Merge pull request #500 from graphql-python/2.0

[WIP] Road to 2.0

.gitignore

@@ -80,3 +80,4 @@ target/
 # Databases
 *.sqlite3
 .vscode
+.mypy_cache

.travis.yml

@@ -2,8 +2,8 @@ language: python
 sudo: false
 python:
 - 2.7
-- 3.4
 - 3.5
+- 3.6
 - pypy
 before_install:
 - |
@@ -26,6 +26,8 @@ install:
     python setup.py develop
   elif [ "$TEST_TYPE" = lint ]; then
     pip install flake8
+  elif [ "$TEST_TYPE" = mypy ]; then
+    pip install mypy
   fi
 script:
 - |
@@ -33,6 +35,10 @@ script:
     echo "Checking Python code lint."
     flake8 graphene
     exit
+  elif [ "$TEST_TYPE" = mypy ]; then
+    echo "Checking Python types."
+    mypy graphene
+    exit
   elif [ "$TEST_TYPE" = build ]; then
     py.test --cov=graphene graphene examples
   fi
@@ -51,6 +57,8 @@ matrix:
   include:
   - python: '2.7'
     env: TEST_TYPE=lint
+  - python: '3.6'
+    env: TEST_TYPE=mypy
 deploy:
   provider: pypi
   user: syrusakbary
@@ -58,3 +66,4 @@ deploy:
     tags: true
   password:
     secure: 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
+  distributions: "sdist bdist_wheel"

README.md

@@ -1,4 +1,4 @@
-Please read [UPGRADE-v1.0.md](/UPGRADE-v1.0.md) to learn how to upgrade to Graphene `1.0`.
+Please read [UPGRADE-v2.0.md](/UPGRADE-v2.0.md) to learn how to upgrade to Graphene `2.0`.
 
 ---
 
@@ -32,12 +32,12 @@ Also, Graphene is fully compatible with the GraphQL spec, working seamlessly wit
 For instaling graphene, just run this command in your shell
 
 ```bash
-pip install "graphene>=1.0"
+pip install "graphene>=2.0.dev"
 ```
 
-## 1.0 Upgrade Guide
+## 2.0 Upgrade Guide
 
-Please read [UPGRADE-v1.0.md](/UPGRADE-v1.0.md) to learn how to upgrade.
+Please read [UPGRADE-v2.0.md](/UPGRADE-v2.0.md) to learn how to upgrade.
 
 
 ## Examples
@@ -48,7 +48,7 @@ Here is one example for you to get started:
 class Query(graphene.ObjectType):
     hello = graphene.String(description='A typical hello world')
 
-    def resolve_hello(self, args, context, info):
+    def resolve_hello(self, info):
         return 'World'
 
 schema = graphene.Schema(query=Query)

README.rst

@@ -1,5 +1,5 @@
-Please read `UPGRADE-v1.0.md </UPGRADE-v1.0.md>`__ to learn how to
-upgrade to Graphene ``1.0``.
+Please read `UPGRADE-v2.0.md </UPGRADE-v2.0.md>`__ to learn how to
+upgrade to Graphene ``2.0``.
 
 --------------
 
@@ -11,7 +11,7 @@ building GraphQL schemas/types fast and easily.
 
 -  **Easy to use:** Graphene helps you use GraphQL in Python without
    effort.
--  **Relay:** Graphene has builtin support for both Relay.
+-  **Relay:** Graphene has builtin support for Relay.
 -  **Data agnostic:** Graphene supports any kind of data source: SQL
    (Django, SQLAlchemy), NoSQL, custom Python objects, etc. We believe
    that by providing a complete API you could plug Graphene anywhere
@@ -47,12 +47,12 @@ For instaling graphene, just run this command in your shell
 
 .. code:: bash
 
-    pip install "graphene>=1.0"
+    pip install "graphene>=2.0"
 
-1.0 Upgrade Guide
+2.0 Upgrade Guide
 -----------------
 
-Please read `UPGRADE-v1.0.md </UPGRADE-v1.0.md>`__ to learn how to
+Please read `UPGRADE-v2.0.md </UPGRADE-v2.0.md>`__ to learn how to
 upgrade.
 
 Examples
@@ -65,7 +65,7 @@ Here is one example for you to get started:
     class Query(graphene.ObjectType):
         hello = graphene.String(description='A typical hello world')
 
-        def resolve_hello(self, args, context, info):
+        def resolve_hello(self, info):
             return 'World'
 
     schema = graphene.Schema(query=Query)

UPGRADE-v2.0.md

@@ -0,0 +1,293 @@
+# v2.0 Upgrade Guide
+
+`ObjectType`, `Interface`, `InputObjectType`, `Scalar` and `Enum` implementations
+have been quite simplified, without the need to define a explicit Metaclass for each subtype.
+
+It also improves the field resolvers, [simplifying the code](#simpler-resolvers) the
+developer has to write to use them.
+
+**Deprecations:**
+* [`AbstractType`](#abstracttype-deprecated)
+* [`resolve_only_args`](#resolve_only_args)
+* [`Mutation.Input`](#mutationinput)
+
+**Breaking changes:**
+* [`Simpler Resolvers`](#simpler-resolvers)
+* [`Node Connections`](#node-connections)
+
+**New Features!**
+* [`InputObjectType`](#inputobjecttype)
+* [`Meta as Class arguments`](#meta-ass-class-arguments) (_only available for Python 3_)
+
+
+> The type metaclasses are now deleted as they are no longer necessary.  If your code was depending
+> on this strategy for creating custom attrs, see an [example on how to do it in 2.0](https://github.com/graphql-python/graphene/blob/2.0/graphene/tests/issues/test_425.py).
+
+## Deprecations
+
+### AbstractType deprecated
+
+AbstractType is deprecated in graphene 2.0, you can now use normal inheritance instead.
+
+Before:
+
+```python
+class CommonFields(AbstractType):
+    name = String()
+
+class Pet(CommonFields, Interface):
+    pass
+```
+
+With 2.0:
+
+```python
+class CommonFields(object):
+    name = String()
+
+class Pet(CommonFields, Interface):
+    pass
+```
+
+### resolve\_only\_args
+
+`resolve_only_args` is now deprecated as the resolver API has been simplified.
+
+Before:
+
+```python
+class User(ObjectType):
+    name = String()
+
+    @resolve_only_args
+    def resolve_name(self):
+        return self.name
+```
+
+With 2.0:
+
+```python
+class User(ObjectType):
+    name = String()
+
+    def resolve_name(self, info):
+        return self.name
+```
+
+### Mutation.Input
+
+`Mutation.Input` is now deprecated in favor of using `Mutation.Arguments` (`ClientIDMutation` still uses `Input`).
+
+Before:
+
+```python
+class User(Mutation):
+    class Input:
+        name = String()
+```
+
+With 2.0:
+
+```python
+class User(Mutation):
+    class Arguments:
+        name = String()
+```
+
+
+## Breaking Changes
+
+### Simpler resolvers
+
+All the resolvers in graphene have been simplified.
+Prior to Graphene `2.0`, all resolvers required four arguments: `(root, args, context, info)`.
+Now, resolver `args` are passed as keyword arguments to the function, and `context` argument dissapeared in favor of `info.context`.
+
+Before:
+
+```python
+my_field = graphene.String(my_arg=graphene.String())
+
+def resolve_my_field(self, args, context, info):
+    my_arg = args.get('my_arg')
+    return ...
+```
+
+With 2.0:
+
+```python
+my_field = graphene.String(my_arg=graphene.String())
+
+def resolve_my_field(self, info, my_arg):
+    return ...
+```
+
+And, if you need the context in the resolver, you can use `info.context`:
+
+```python
+my_field = graphene.String(my_arg=graphene.String())
+
+def resolve_my_field(self, info, my_arg):
+    context = info.context
+    return ...
+```
+
+### Node Connections
+
+Node types no longer have a `Connection` by default.
+In 2.0 and onwards `Connection`s should be defined explicitly.
+
+Before:
+
+```python
+class User(ObjectType):
+    class Meta:
+        interfaces = [relay.Node]
+    name = String()
+
+class Query(ObjectType):
+    user_connection = relay.ConnectionField(User)
+```
+
+With 2.0:
+
+```python
+class User(ObjectType):
+    class Meta:
+        interfaces = [relay.Node]
+    name = String()
+
+class UserConnection(relay.Connection):
+    class Meta:
+        node = User
+
+class Query(ObjectType):
+    user_connection = relay.ConnectionField(UserConnection)
+```
+
+## Node.get_node
+
+The method `get_node` in `ObjectTypes` that have `Node` as interface, changes its API.
+From `def get_node(cls, id, context, info)` to `def get_node(cls, info, id)`.
+
+```python
+class MyObject(ObjectType):
+    class Meta:
+        interfaces = (Node, )
+
+    @classmethod
+    def get_node(cls, id, context, info):
+        return ...
+```
+
+To:
+```python
+class MyObject(ObjectType):
+    class Meta:
+        interfaces = (Node, )
+
+    @classmethod
+    def get_node(cls, info, id):
+        return ...
+```
+
+## Mutation.mutate
+
+Now only receives (`root`, `info`, `**args`)
+
+
+## ClientIDMutation.mutate_and_get_payload
+
+Now only receives (`root`, `info`, `**input`)
+
+
+## New Features
+
+### InputObjectType
+
+If you are using `InputObjectType`, you now can access
+its fields via `getattr` (`my_input.myattr`) when resolving, instead of
+the classic way `my_input['myattr']`.
+
+And also use custom defined properties on your input class.
+
+Example. Before:
+
+```python
+class UserInput(InputObjectType):
+    id = ID(required=True)
+
+def is_valid_input(input):
+    return input.get('id').startswith('userid_')
+
+class Query(ObjectType):
+    user = graphene.Field(User, input=UserInput())
+
+    @resolve_only_args
+    def resolve_user(self, input):
+        user_id = input.get('id')
+        if is_valid_input(user_id):
+            return get_user(user_id)
+```
+
+With 2.0:
+
+```python
+class UserInput(InputObjectType):
+    id = ID(required=True)
+
+    @property
+    def is_valid(self):
+        return self.id.startswith('userid_')
+
+class Query(ObjectType):
+    user = graphene.Field(User, input=UserInput())
+
+    def resolve_user(self, info, input):
+        if input.is_valid:
+            return get_user(input.id)
+```
+
+
+### Meta as Class arguments
+
+Now you can use the meta options as class arguments (**ONLY PYTHON 3**).
+
+Before:
+
+```python
+class Dog(ObjectType):
+    class Meta:
+        interfaces = [Pet]
+    name = String()
+```
+
+With 2.0:
+
+```python
+class Dog(ObjectType, interfaces=[Pet]):
+    name = String()
+```
+
+
+### Abstract types
+
+Now you can create abstact types super easily, without the need of subclassing the meta.
+
+```python
+class Base(ObjectType):
+    class Meta:
+        abstract = True
+    
+    id = ID()
+
+    def resolve_id(self, info):
+        return "{type}_{id}".format(
+            type=self.__class__.__name__,
+            id=self.id
+        )
+```
+
+### UUID Scalar
+
+In Graphene 2.0 there is a new dedicated scalar for UUIDs, `UUID`.

docs/execution/dataloader.rst

@@ -99,8 +99,8 @@ leaner code and at most 4 database requests, and possibly fewer if there are cac
         best_friend = graphene.Field(lambda: User)
         friends = graphene.List(lambda: User)
 
-        def resolve_best_friend(self, args, context, info):
+        def resolve_best_friend(self, info):
             return user_loader.load(self.best_friend_id)
 
-        def resolve_friends(self, args, context, info):
+        def resolve_friends(self, info):
             return user_loader.load_many(self.friend_ids)

docs/execution/execute.rst

@@ -24,8 +24,8 @@ You can pass context to a query via ``context_value``.
     class Query(graphene.ObjectType):
         name = graphene.String()
 
-        def resolve_name(self, args, context, info):
-            return context.get('name')
+        def resolve_name(self, info):
+            return info.context.get('name')
 
     schema = graphene.Schema(Query)
     result = schema.execute('{ name }', context_value={'name': 'Syrus'})
@@ -43,8 +43,8 @@ You can pass variables to a query via ``variable_values``.
     class Query(graphene.ObjectType):
         user = graphene.Field(User)
 
-        def resolve_user(self, args, context, info):
-            return context.get('user')
+        def resolve_user(self, info):
+            return info.context.get('user')
 
     schema = graphene.Schema(Query)
     result = schema.execute(

docs/execution/middleware.rst

@@ -31,10 +31,10 @@ This middleware only continues evaluation if the ``field_name`` is not ``'user'`
 .. code:: python
 
     class AuthorizationMiddleware(object):
-        def resolve(self, next, root, args, context, info):
+        def resolve(self, next, root, info, **args):
             if info.field_name == 'user':
                 return None
-            return next(root, args, context, info)
+            return next(root, info, **args)
 
 
 And then execute it with:

docs/quickstart.rst

@@ -12,15 +12,15 @@ Let’s build a basic GraphQL schema from scratch.
 Requirements
 ------------
 
--  Python (2.7, 3.2, 3.3, 3.4, 3.5, pypy)
--  Graphene (1.0)
+-  Python (2.7, 3.4, 3.5, 3.6, pypy)
+-  Graphene (2.0)
 
 Project setup
 -------------
 
 .. code:: bash
 
-    pip install "graphene>=1.0"
+    pip install "graphene>=2.0"
 
 Creating a basic Schema
 -----------------------
@@ -37,10 +37,10 @@ one field: ``hello`` and an input name. And when we query it, it should return `
     import graphene
 
     class Query(graphene.ObjectType):
-        hello = graphene.String(name=graphene.Argument(graphene.String, default_value="stranger"))
+        hello = graphene.String(name=graphene.String(default_value="stranger"))
 
-        def resolve_hello(self, args, context, info):
-            return 'Hello ' + args['name']
+        def resolve_hello(self, info, name):
+            return 'Hello ' + name
 
     schema = graphene.Schema(query=Query)
 

docs/relay/connection.rst

@@ -41,5 +41,5 @@ that implements ``Node`` will have a default Connection.
         name = graphene.String()
         ships = relay.ConnectionField(ShipConnection)
 
-        def resolve_ships(self, args, context, info):
+        def resolve_ships(self, info):
             return []

docs/relay/mutations.rst

@@ -21,9 +21,9 @@ subclass of ``relay.ClientIDMutation``.
         faction = graphene.Field(Faction)
 
         @classmethod
-        def mutate_and_get_payload(cls, input, context, info):
-            ship_name = input.get('ship_name')
-            faction_id = input.get('faction_id')
+        def mutate_and_get_payload(cls, root, info, **input):
+            ship_name = input.ship_name
+            faction_id = input.faction_id
             ship = create_ship(ship_name, faction_id)
             faction = get_faction(faction_id)
             return IntroduceShip(ship=ship, faction=faction)
@@ -46,7 +46,7 @@ Mutations can also accept files, that's how it will work with different integrat
          success = graphene.String()
 
         @classmethod
-        def mutate_and_get_payload(cls, input, context, info):
+        def mutate_and_get_payload(cls, root, info, **input):
             # When using it in Django, context will be the request
             files = context.FILES
             # Or, if used in Flask, context will be the flask global request

docs/relay/nodes.rst

@@ -22,7 +22,7 @@ Example usage (taken from the `Starwars Relay example`_):
         name = graphene.String(description='The name of the ship.')
 
         @classmethod
-        def get_node(cls, id, context, info):
+        def get_node(cls, info, id):
             return get_ship(id)
 
 The ``id`` returned by the ``Ship`` type when you query it will be a
@@ -55,7 +55,7 @@ Example of a custom node:
             return '{}:{}'.format(type, id)
 
         @staticmethod
-        def get_node_from_global_id(global_id, context, info, only_type=None):
+        def get_node_from_global_id(info global_id, only_type=None):
             type, id = global_id.split(':')
             if only_node:
                 # We assure that the node type that we want to retrieve

docs/types/mutations.rst

@@ -13,15 +13,14 @@ This example defines a Mutation:
     import graphene
 
     class CreatePerson(graphene.Mutation):
-        class Input:
+        class Arguments:
             name = graphene.String()
 
         ok = graphene.Boolean()
         person = graphene.Field(lambda: Person)
 
-        @staticmethod
-        def mutate(root, args, context, info):
-            person = Person(name=args.get('name'))
+        def mutate(self, name):
+            person = Person(name=name)
             ok = True
             return CreatePerson(person=person, ok=ok)
 
@@ -90,30 +89,29 @@ InputFields are used in mutations to allow nested input data for mutations
 To use an InputField you define an InputObjectType that specifies the structure of your input data
 
 
-
-
 .. code:: python
 
     import graphene
 
     class PersonInput(graphene.InputObjectType):
-        name = graphene.String()
-        age = graphene.Int()
+        name = graphene.String(required=True)
+        age = graphene.Int(required=True)
 
     class CreatePerson(graphene.Mutation):
-        class Input:
-            person_data = graphene.Argument(PersonInput)
+        class Arguments:
+            person_data = PersonInput(required=True)
 
-        person = graphene.Field(lambda: Person)
+        person = graphene.Field(Person)
 
         @staticmethod
-        def mutate(root, args, context, info):
-            p_data = args.get('person_data')
-
+        def mutate(root, person_data=None):
             name = p_data.get('name')
             age = p_data.get('age')
 
-            person = Person(name=name, age=age)
+            person = Person(
+                name=person_data.name,
+                age=person_data.age
+            )
             return CreatePerson(person=person)
 
 

docs/types/objecttypes.rst

@@ -25,7 +25,7 @@ This example model defines a Person, with a first and a last name:
         last_name = graphene.String()
         full_name = graphene.String()
 
-        def resolve_full_name(self, args, context, info):
+        def resolve_full_name(self, info):
             return '{} {}'.format(self.first_name, self.last_name)
 
 **first\_name** and **last\_name** are fields of the ObjectType. Each
@@ -71,8 +71,7 @@ method in the class.
     class Query(graphene.ObjectType):
         reverse = graphene.String(word=graphene.String())
 
-        def resolve_reverse(self, args, context, info):
-            word = args.get('word')
+        def resolve_reverse(self, info, word):
             return word[::-1]
 
 Resolvers outside the class
@@ -84,8 +83,7 @@ A field can use a custom resolver from outside the class:
 
     import graphene
 
-    def reverse(root, args, context, info):
-        word = args.get('word')
+    def reverse(root, info, word):
         return word[::-1]
 
     class Query(graphene.ObjectType):

docs/types/unions.rst

@@ -0,0 +1,63 @@
+Unions
+======
+
+Union types are very similar to interfaces, but they don't get
+to specify any common fields between the types.
+
+The basics:
+
+- Each Union is a Python class that inherits from ``graphene.Union``.
+- Unions don't have any fields on it, just links to the possible objecttypes.
+
+Quick example
+-------------
+
+This example model defines a ``Character`` interface with a name. ``Human``
+and ``Droid`` are two implementations of that interface.
+
+.. code:: python
+
+    import graphene
+
+    class Human(graphene.ObjectType):
+        name = graphene.String()
+        born_in = graphene.String()
+
+    class Droid(graphene.ObjectType):
+        name = graphene.String()
+        primary_function = graphene.String()
+
+    class Starship(graphene.ObjectType):
+        name = graphene.String()
+        length = graphene.Int()
+
+    class SearchResult(graphene.Union):
+        class Meta:
+            types = (Human, Droid, Starship)
+
+
+Wherever we return a SearchResult type in our schema, we might get a Human, a Droid, or a Starship.
+Note that members of a union type need to be concrete object types;
+you can't create a union type out of interfaces or other unions.
+
+The above types have the following representation in a schema:
+
+.. code::
+
+    type Droid {
+      name: String
+      primaryFunction: String
+    }
+
+    type Human {
+      name: String
+      bornIn: String
+    }
+
+    type Ship {
+      name: String
+      length: Int
+    }
+
+    union SearchResult = Human | Droid | Starship
+

examples/complex_example.py

@@ -11,10 +11,9 @@ class Address(graphene.ObjectType):
 
 
 class Query(graphene.ObjectType):
-    address = graphene.Field(Address, geo=GeoInput())
+    address = graphene.Field(Address, geo=GeoInput(required=True))
 
-    def resolve_address(self, args, context, info):
-        geo = args.get('geo')
+    def resolve_address(self, info, geo):
         return Address(latlng="({},{})".format(geo.get('lat'), geo.get('lng')))
 
 

examples/context_example.py

@@ -9,8 +9,9 @@ class User(graphene.ObjectType):
 class Query(graphene.ObjectType):
     me = graphene.Field(User)
 
-    def resolve_me(self, args, context, info):
-        return context['user']
+    def resolve_me(self, info):
+        return info.context['user']
+
 
 schema = graphene.Schema(query=Query)
 query = '''

examples/simple_example.py

@@ -11,9 +11,10 @@ class Query(graphene.ObjectType):
 
     patron = graphene.Field(Patron)
 
-    def resolve_patron(self, args, context, info):
+    def resolve_patron(self, info):
         return Patron(id=1, name='Syrus', age=27)
 
+
 schema = graphene.Schema(query=Query)
 query = '''
     query something{

examples/starwars/schema.py

@@ -1,5 +1,4 @@
 import graphene
-from graphene import resolve_only_args
 
 from .data import get_character, get_droid, get_hero, get_human
 
@@ -16,7 +15,7 @@ class Character(graphene.Interface):
     friends = graphene.List(lambda: Character)
     appears_in = graphene.List(Episode)
 
-    def resolve_friends(self, args, *_):
+    def resolve_friends(self, info):
         # The character friends is a list of strings
         return [get_character(f) for f in self.friends]
 
@@ -46,16 +45,13 @@ class Query(graphene.ObjectType):
                            id=graphene.String()
                            )
 
-    @resolve_only_args
-    def resolve_hero(self, episode=None):
+    def resolve_hero(self, info, episode=None):
         return get_hero(episode)
 
-    @resolve_only_args
-    def resolve_human(self, id):
+    def resolve_human(self, info, id):
         return get_human(id)
 
-    @resolve_only_args
-    def resolve_droid(self, id):
+    def resolve_droid(self, info, id):
         return get_droid(id)
 
 

examples/starwars/tests/test_query.py

@@ -1,4 +1,5 @@
 from graphene.test import Client
+
 from ..data import setup
 from ..schema import schema
 
@@ -6,6 +7,7 @@ setup()
 
 client = Client(schema)
 
+
 def test_hero_name_query(snapshot):
     query = '''
         query HeroNameQuery {
@@ -17,7 +19,6 @@ def test_hero_name_query(snapshot):
     snapshot.assert_match(client.execute(query))
 
 
-
 def test_hero_name_and_friends_query(snapshot):
     query = '''
         query HeroNameAndFriendsQuery {

examples/starwars_relay/schema.py

@@ -1,5 +1,5 @@
 import graphene
-from graphene import relay, resolve_only_args
+from graphene import relay
 
 from .data import create_ship, get_empire, get_faction, get_rebels, get_ship
 
@@ -13,10 +13,16 @@ class Ship(graphene.ObjectType):
     name = graphene.String(description='The name of the ship.')
 
     @classmethod
-    def get_node(cls, id, context, info):
+    def get_node(cls, info, id):
         return get_ship(id)
 
 
+class ShipConnection(relay.Connection):
+
+    class Meta:
+        node = Ship
+
+
 class Faction(graphene.ObjectType):
     '''A faction in the Star Wars saga'''
 
@@ -24,15 +30,14 @@ class Faction(graphene.ObjectType):
         interfaces = (relay.Node, )
 
     name = graphene.String(description='The name of the faction.')
-    ships = relay.ConnectionField(Ship, description='The ships used by the faction.')
+    ships = relay.ConnectionField(ShipConnection, description='The ships used by the faction.')
 
-    @resolve_only_args
-    def resolve_ships(self, **args):
+    def resolve_ships(self, info, **args):
         # Transform the instance ship_ids into real instances
         return [get_ship(ship_id) for ship_id in self.ships]
 
     @classmethod
-    def get_node(cls, id, context, info):
+    def get_node(cls, info, id):
         return get_faction(id)
 
 
@@ -46,9 +51,7 @@ class IntroduceShip(relay.ClientIDMutation):
     faction = graphene.Field(Faction)
 
     @classmethod
-    def mutate_and_get_payload(cls, input, context, info):
-        ship_name = input.get('ship_name')
-        faction_id = input.get('faction_id')
+    def mutate_and_get_payload(cls, root, info, ship_name, faction_id, client_mutation_id=None):
         ship = create_ship(ship_name, faction_id)
         faction = get_faction(faction_id)
         return IntroduceShip(ship=ship, faction=faction)
@@ -59,12 +62,10 @@ class Query(graphene.ObjectType):
     empire = graphene.Field(Faction)
     node = relay.Node.Field()
 
-    @resolve_only_args
-    def resolve_rebels(self):
+    def resolve_rebels(self, info):
         return get_rebels()
 
-    @resolve_only_args
-    def resolve_empire(self):
+    def resolve_empire(self, info):
         return get_empire()
 
 

examples/starwars_relay/tests/snapshots/snap_test_objectidentification.py

@@ -51,3 +51,63 @@ snapshots['test_correctly_refetches_xwing 1'] = {
         }
     }
 }
+
+snapshots['test_str_schema 1'] = '''schema {
+  query: Query
+  mutation: Mutation
+}
+
+type Faction implements Node {
+  id: ID!
+  name: String
+  ships(before: String, after: String, first: Int, last: Int): ShipConnection
+}
+
+input IntroduceShipInput {
+  shipName: String!
+  factionId: String!
+  clientMutationId: String
+}
+
+type IntroduceShipPayload {
+  ship: Ship
+  faction: Faction
+  clientMutationId: String
+}
+
+type Mutation {
+  introduceShip(input: IntroduceShipInput!): IntroduceShipPayload
+}
+
+interface Node {
+  id: ID!
+}
+
+type PageInfo {
+  hasNextPage: Boolean!
+  hasPreviousPage: Boolean!
+  startCursor: String
+  endCursor: String
+}
+
+type Query {
+  rebels: Faction
+  empire: Faction
+  node(id: ID!): Node
+}
+
+type Ship implements Node {
+  id: ID!
+  name: String
+}
+
+type ShipConnection {
+  pageInfo: PageInfo!
+  edges: [ShipEdge]!
+}
+
+type ShipEdge {
+  node: Ship
+  cursor: String!
+}
+'''

examples/starwars_relay/tests/test_connections.py

@@ -1,4 +1,5 @@
 from graphene.test import Client
+
 from ..data import setup
 from ..schema import schema
 

examples/starwars_relay/tests/test_mutation.py

@@ -1,4 +1,5 @@
 from graphene.test import Client
+
 from ..data import setup
 from ..schema import schema
 

examples/starwars_relay/tests/test_objectidentification.py

@@ -1,4 +1,5 @@
 from graphene.test import Client
+
 from ..data import setup
 from ..schema import schema
 
@@ -7,66 +8,8 @@ setup()
 client = Client(schema)
 
 
-def test_str_schema():
-    assert str(schema) == '''schema {
-  query: Query
-  mutation: Mutation
-}
-
-type Faction implements Node {
-  id: ID!
-  name: String
-  ships(before: String, after: String, first: Int, last: Int): ShipConnection
-}
-
-input IntroduceShipInput {
-  shipName: String!
-  factionId: String!
-  clientMutationId: String
-}
-
-type IntroduceShipPayload {
-  ship: Ship
-  faction: Faction
-  clientMutationId: String
-}
-
-type Mutation {
-  introduceShip(input: IntroduceShipInput!): IntroduceShipPayload
-}
-
-interface Node {
-  id: ID!
-}
-
-type PageInfo {
-  hasNextPage: Boolean!
-  hasPreviousPage: Boolean!
-  startCursor: String
-  endCursor: String
-}
-
-type Query {
-  rebels: Faction
-  empire: Faction
-  node(id: ID!): Node
-}
-
-type Ship implements Node {
-  id: ID!
-  name: String
-}
-
-type ShipConnection {
-  pageInfo: PageInfo!
-  edges: [ShipEdge]!
-}
-
-type ShipEdge {
-  node: Ship
-  cursor: String!
-}
-'''
+def test_str_schema(snapshot):
+    snapshot.assert_match(str(schema))
 
 
 def test_correctly_fetches_id_name_rebels(snapshot):

graphene/__init__.py

@@ -1,21 +1,5 @@
 from .pyutils.version import get_version
 
-
-try:
-    # This variable is injected in the __builtins__ by the build
-    # process. It used to enable importing subpackages when
-    # the required packages are not installed
-    __SETUP__
-except NameError:
-    __SETUP__ = False
-
-
-VERSION = (1, 4, 1, 'final', 0)
-
-__version__ = get_version(VERSION)
-
-if not __SETUP__:
-
 from .types import (
     AbstractType,
     ObjectType,
@@ -27,11 +11,15 @@ if not __SETUP__:
     Schema,
     Scalar,
     String, ID, Int, Float, Boolean,
+    JSONString,
+    UUID,
     List, NonNull,
     Enum,
     Argument,
     Dynamic,
     Union,
+    Context,
+    ResolveInfo
 )
 from .relay import (
     Node,
@@ -45,8 +33,13 @@ if not __SETUP__:
 from .utils.resolve_only_args import resolve_only_args
 from .utils.module_loading import lazy_import
 
+
+VERSION = (2, 0, 0, 'alpha', 0)
+
+__version__ = get_version(VERSION)
+
 __all__ = [
-        'AbstractType',
+    '__version__',
     'ObjectType',
     'InputObjectType',
     'Interface',
@@ -61,6 +54,8 @@ if not __SETUP__:
     'Float',
     'Enum',
     'Boolean',
+    'JSONString',
+    'UUID',
     'List',
     'NonNull',
     'Argument',
@@ -75,4 +70,9 @@ if not __SETUP__:
     'ConnectionField',
     'PageInfo',
     'lazy_import',
+    'Context',
+    'ResolveInfo',
+
+    # Deprecated
+    'AbstractType',
 ]

graphene/pyutils/compat.py

@@ -0,0 +1,19 @@
+from __future__ import absolute_import
+import six
+
+try:
+    from enum import Enum
+except ImportError:
+    from .enum import Enum
+
+try:
+    from inspect import signature
+except ImportError:
+    from .signature import signature
+
+if six.PY2:
+    def func_name(func):
+        return func.func_name
+else:
+    def func_name(func):
+        return func.__name__

graphene/pyutils/init_subclass.py

@@ -0,0 +1,19 @@
+is_init_subclass_available = hasattr(object, '__init_subclass__')
+
+if not is_init_subclass_available:
+    class InitSubclassMeta(type):
+        """Metaclass that implements PEP 487 protocol"""
+        def __new__(cls, name, bases, ns, **kwargs):
+            __init_subclass__ = ns.pop('__init_subclass__', None)
+            if __init_subclass__:
+                __init_subclass__ = classmethod(__init_subclass__)
+                ns['__init_subclass__'] = __init_subclass__
+            return super(InitSubclassMeta, cls).__new__(cls, name, bases, ns, **kwargs)
+
+        def __init__(cls, name, bases, ns, **kwargs):
+            super(InitSubclassMeta, cls).__init__(name, bases, ns)
+            super_class = super(cls, cls)
+            if hasattr(super_class, '__init_subclass__'):
+                super_class.__init_subclass__.__func__(cls, **kwargs)
+else:
+    InitSubclassMeta = type  # type: ignore

graphene/pyutils/signature.py

@@ -0,0 +1,808 @@
+# Copyright 2001-2013 Python Software Foundation; All Rights Reserved
+"""Function signature objects for callables
+Back port of Python 3.3's function signature tools from the inspect module,
+modified to be compatible with Python 2.7 and 3.2+.
+"""
+from __future__ import absolute_import, division, print_function
+import itertools
+import functools
+import re
+import types
+
+from collections import OrderedDict
+
+__version__ = "0.4"
+
+__all__ = ['BoundArguments', 'Parameter', 'Signature', 'signature']
+
+
+_WrapperDescriptor = type(type.__call__)
+_MethodWrapper = type(all.__call__)
+
+_NonUserDefinedCallables = (_WrapperDescriptor,
+                            _MethodWrapper,
+                            types.BuiltinFunctionType)
+
+
+def formatannotation(annotation, base_module=None):
+    if isinstance(annotation, type):
+        if annotation.__module__ in ('builtins', '__builtin__', base_module):
+            return annotation.__name__
+        return annotation.__module__+'.'+annotation.__name__
+    return repr(annotation)
+
+
+def _get_user_defined_method(cls, method_name, *nested):
+    try:
+        if cls is type:
+            return
+        meth = getattr(cls, method_name)
+        for name in nested:
+            meth = getattr(meth, name, meth)
+    except AttributeError:
+        return
+    else:
+        if not isinstance(meth, _NonUserDefinedCallables):
+            # Once '__signature__' will be added to 'C'-level
+            # callables, this check won't be necessary
+            return meth
+
+
+def signature(obj):
+    '''Get a signature object for the passed callable.'''
+
+    if not callable(obj):
+        raise TypeError('{0!r} is not a callable object'.format(obj))
+
+    if isinstance(obj, types.MethodType):
+        sig = signature(obj.__func__)
+        if obj.__self__ is None:
+            # Unbound method: the first parameter becomes positional-only
+            if sig.parameters:
+                first = sig.parameters.values()[0].replace(
+                    kind=_POSITIONAL_ONLY)
+                return sig.replace(
+                    parameters=(first,) + tuple(sig.parameters.values())[1:])
+            else:
+                return sig
+        else:
+            # In this case we skip the first parameter of the underlying
+            # function (usually `self` or `cls`).
+            return sig.replace(parameters=tuple(sig.parameters.values())[1:])
+
+    try:
+        sig = obj.__signature__
+    except AttributeError:
+        pass
+    else:
+        if sig is not None:
+            return sig
+
+    try:
+        # Was this function wrapped by a decorator?
+        wrapped = obj.__wrapped__
+    except AttributeError:
+        pass
+    else:
+        return signature(wrapped)
+
+    if isinstance(obj, types.FunctionType):
+        return Signature.from_function(obj)
+
+    if isinstance(obj, functools.partial):
+        sig = signature(obj.func)
+
+        new_params = OrderedDict(sig.parameters.items())
+
+        partial_args = obj.args or ()
+        partial_keywords = obj.keywords or {}
+        try:
+            ba = sig.bind_partial(*partial_args, **partial_keywords)
+        except TypeError as ex:
+            msg = 'partial object {0!r} has incorrect arguments'.format(obj)
+            raise ValueError(msg)
+
+        for arg_name, arg_value in ba.arguments.items():
+            param = new_params[arg_name]
+            if arg_name in partial_keywords:
+                # We set a new default value, because the following code
+                # is correct:
+                #
+                #   >>> def foo(a): print(a)
+                #   >>> print(partial(partial(foo, a=10), a=20)())
+                #   20
+                #   >>> print(partial(partial(foo, a=10), a=20)(a=30))
+                #   30
+                #
+                # So, with 'partial' objects, passing a keyword argument is
+                # like setting a new default value for the corresponding
+                # parameter
+                #
+                # We also mark this parameter with '_partial_kwarg'
+                # flag.  Later, in '_bind', the 'default' value of this
+                # parameter will be added to 'kwargs', to simulate
+                # the 'functools.partial' real call.
+                new_params[arg_name] = param.replace(default=arg_value,
+                                                     _partial_kwarg=True)
+
+            elif (param.kind not in (_VAR_KEYWORD, _VAR_POSITIONAL) and
+                            not param._partial_kwarg):
+                new_params.pop(arg_name)
+
+        return sig.replace(parameters=new_params.values())
+
+    sig = None
+    if isinstance(obj, type):
+        # obj is a class or a metaclass
+
+        # First, let's see if it has an overloaded __call__ defined
+        # in its metaclass
+        call = _get_user_defined_method(type(obj), '__call__')
+        if call is not None:
+            sig = signature(call)
+        else:
+            # Now we check if the 'obj' class has a '__new__' method
+            new = _get_user_defined_method(obj, '__new__')
+            if new is not None:
+                sig = signature(new)
+            else:
+                # Finally, we should have at least __init__ implemented
+                init = _get_user_defined_method(obj, '__init__')
+                if init is not None:
+                    sig = signature(init)
+    elif not isinstance(obj, _NonUserDefinedCallables):
+        # An object with __call__
+        # We also check that the 'obj' is not an instance of
+        # _WrapperDescriptor or _MethodWrapper to avoid
+        # infinite recursion (and even potential segfault)
+        call = _get_user_defined_method(type(obj), '__call__', 'im_func')
+        if call is not None:
+            sig = signature(call)
+
+    if sig is not None:
+        # For classes and objects we skip the first parameter of their
+        # __call__, __new__, or __init__ methods
+        return sig.replace(parameters=tuple(sig.parameters.values())[1:])
+
+    if isinstance(obj, types.BuiltinFunctionType):
+        # Raise a nicer error message for builtins
+        msg = 'no signature found for builtin function {0!r}'.format(obj)
+        raise ValueError(msg)
+
+    raise ValueError('callable {0!r} is not supported by signature'.format(obj))
+
+
+class _void(object):
+    '''A private marker - used in Parameter & Signature'''
+
+
+class _empty(object):
+    pass
+
+
+class _ParameterKind(int):
+    def __new__(self, *args, **kwargs):
+        obj = int.__new__(self, *args)
+        obj._name = kwargs['name']
+        return obj
+
+    def __str__(self):
+        return self._name
+
+    def __repr__(self):
+        return '<_ParameterKind: {0!r}>'.format(self._name)
+
+
+_POSITIONAL_ONLY        = _ParameterKind(0, name='POSITIONAL_ONLY')
+_POSITIONAL_OR_KEYWORD  = _ParameterKind(1, name='POSITIONAL_OR_KEYWORD')
+_VAR_POSITIONAL         = _ParameterKind(2, name='VAR_POSITIONAL')
+_KEYWORD_ONLY           = _ParameterKind(3, name='KEYWORD_ONLY')
+_VAR_KEYWORD            = _ParameterKind(4, name='VAR_KEYWORD')
+
+
+class Parameter(object):
+    '''Represents a parameter in a function signature.
+    Has the following public attributes:
+    * name : str
+        The name of the parameter as a string.
+    * default : object
+        The default value for the parameter if specified.  If the
+        parameter has no default value, this attribute is not set.
+    * annotation
+        The annotation for the parameter if specified.  If the
+        parameter has no annotation, this attribute is not set.
+    * kind : str
+        Describes how argument values are bound to the parameter.
+        Possible values: `Parameter.POSITIONAL_ONLY`,
+        `Parameter.POSITIONAL_OR_KEYWORD`, `Parameter.VAR_POSITIONAL`,
+        `Parameter.KEYWORD_ONLY`, `Parameter.VAR_KEYWORD`.
+    '''
+
+    __slots__ = ('_name', '_kind', '_default', '_annotation', '_partial_kwarg')
+
+    POSITIONAL_ONLY         = _POSITIONAL_ONLY
+    POSITIONAL_OR_KEYWORD   = _POSITIONAL_OR_KEYWORD
+    VAR_POSITIONAL          = _VAR_POSITIONAL
+    KEYWORD_ONLY            = _KEYWORD_ONLY
+    VAR_KEYWORD             = _VAR_KEYWORD
+
+    empty = _empty
+
+    def __init__(self, name, kind, default=_empty, annotation=_empty,
+                 _partial_kwarg=False):
+
+        if kind not in (_POSITIONAL_ONLY, _POSITIONAL_OR_KEYWORD,
+                        _VAR_POSITIONAL, _KEYWORD_ONLY, _VAR_KEYWORD):
+            raise ValueError("invalid value for 'Parameter.kind' attribute")
+        self._kind = kind
+
+        if default is not _empty:
+            if kind in (_VAR_POSITIONAL, _VAR_KEYWORD):
+                msg = '{0} parameters cannot have default values'.format(kind)
+                raise ValueError(msg)
+        self._default = default
+        self._annotation = annotation
+
+        if name is None:
+            if kind != _POSITIONAL_ONLY:
+                raise ValueError("None is not a valid name for a "
+                                 "non-positional-only parameter")
+            self._name = name
+        else:
+            name = str(name)
+            if kind != _POSITIONAL_ONLY and not re.match(r'[a-z_]\w*$', name, re.I):
+                msg = '{0!r} is not a valid parameter name'.format(name)
+                raise ValueError(msg)
+            self._name = name
+
+        self._partial_kwarg = _partial_kwarg
+
+    @property
+    def name(self):
+        return self._name
+
+    @property
+    def default(self):
+        return self._default
+
+    @property
+    def annotation(self):
+        return self._annotation
+
+    @property
+    def kind(self):
+        return self._kind
+
+    def replace(self, name=_void, kind=_void, annotation=_void,
+                default=_void, _partial_kwarg=_void):
+        '''Creates a customized copy of the Parameter.'''
+
+        if name is _void:
+            name = self._name
+
+        if kind is _void:
+            kind = self._kind
+
+        if annotation is _void:
+            annotation = self._annotation
+
+        if default is _void:
+            default = self._default
+
+        if _partial_kwarg is _void:
+            _partial_kwarg = self._partial_kwarg
+
+        return type(self)(name, kind, default=default, annotation=annotation,
+                          _partial_kwarg=_partial_kwarg)
+
+    def __str__(self):
+        kind = self.kind
+
+        formatted = self._name
+        if kind == _POSITIONAL_ONLY:
+            if formatted is None:
+                formatted = ''
+            formatted = '<{0}>'.format(formatted)
+
+        # Add annotation and default value
+        if self._annotation is not _empty:
+            formatted = '{0}:{1}'.format(formatted,
+                                       formatannotation(self._annotation))
+
+        if self._default is not _empty:
+            formatted = '{0}={1}'.format(formatted, repr(self._default))
+
+        if kind == _VAR_POSITIONAL:
+            formatted = '*' + formatted
+        elif kind == _VAR_KEYWORD:
+            formatted = '**' + formatted
+
+        return formatted
+
+    def __repr__(self):
+        return '<{0} at {1:#x} {2!r}>'.format(self.__class__.__name__,
+                                           id(self), self.name)
+
+    def __hash__(self):
+        msg = "unhashable type: '{0}'".format(self.__class__.__name__)
+        raise TypeError(msg)
+
+    def __eq__(self, other):
+        return (issubclass(other.__class__, Parameter) and
+                self._name == other._name and
+                self._kind == other._kind and
+                self._default == other._default and
+                self._annotation == other._annotation)
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+
+class BoundArguments(object):
+    '''Result of `Signature.bind` call.  Holds the mapping of arguments
+    to the function's parameters.
+    Has the following public attributes:
+    * arguments : OrderedDict
+        An ordered mutable mapping of parameters' names to arguments' values.
+        Does not contain arguments' default values.
+    * signature : Signature
+        The Signature object that created this instance.
+    * args : tuple
+        Tuple of positional arguments values.
+    * kwargs : dict
+        Dict of keyword arguments values.
+    '''
+
+    def __init__(self, signature, arguments):
+        self.arguments = arguments
+        self._signature = signature
+
+    @property
+    def signature(self):
+        return self._signature
+
+    @property
+    def args(self):
+        args = []
+        for param_name, param in self._signature.parameters.items():
+            if (param.kind in (_VAR_KEYWORD, _KEYWORD_ONLY) or
+                                                    param._partial_kwarg):
+                # Keyword arguments mapped by 'functools.partial'
+                # (Parameter._partial_kwarg is True) are mapped
+                # in 'BoundArguments.kwargs', along with VAR_KEYWORD &
+                # KEYWORD_ONLY
+                break
+
+            try:
+                arg = self.arguments[param_name]
+            except KeyError:
+                # We're done here. Other arguments
+                # will be mapped in 'BoundArguments.kwargs'
+                break
+            else:
+                if param.kind == _VAR_POSITIONAL:
+                    # *args
+                    args.extend(arg)
+                else:
+                    # plain argument
+                    args.append(arg)
+
+        return tuple(args)
+
+    @property
+    def kwargs(self):
+        kwargs = {}
+        kwargs_started = False
+        for param_name, param in self._signature.parameters.items():
+            if not kwargs_started:
+                if (param.kind in (_VAR_KEYWORD, _KEYWORD_ONLY) or
+                                                param._partial_kwarg):
+                    kwargs_started = True
+                else:
+                    if param_name not in self.arguments:
+                        kwargs_started = True
+                        continue
+
+            if not kwargs_started:
+                continue
+
+            try:
+                arg = self.arguments[param_name]
+            except KeyError:
+                pass
+            else:
+                if param.kind == _VAR_KEYWORD:
+                    # **kwargs
+                    kwargs.update(arg)
+                else:
+                    # plain keyword argument
+                    kwargs[param_name] = arg
+
+        return kwargs
+
+    def __hash__(self):
+        msg = "unhashable type: '{0}'".format(self.__class__.__name__)
+        raise TypeError(msg)
+
+    def __eq__(self, other):
+        return (issubclass(other.__class__, BoundArguments) and
+                self.signature == other.signature and
+                self.arguments == other.arguments)
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+
+class Signature(object):
+    '''A Signature object represents the overall signature of a function.
+    It stores a Parameter object for each parameter accepted by the
+    function, as well as information specific to the function itself.
+    A Signature object has the following public attributes and methods:
+    * parameters : OrderedDict
+        An ordered mapping of parameters' names to the corresponding
+        Parameter objects (keyword-only arguments are in the same order
+        as listed in `code.co_varnames`).
+    * return_annotation : object
+        The annotation for the return type of the function if specified.
+        If the function has no annotation for its return type, this
+        attribute is not set.
+    * bind(*args, **kwargs) -> BoundArguments
+        Creates a mapping from positional and keyword arguments to
+        parameters.
+    * bind_partial(*args, **kwargs) -> BoundArguments
+        Creates a partial mapping from positional and keyword arguments
+        to parameters (simulating 'functools.partial' behavior.)
+    '''
+
+    __slots__ = ('_return_annotation', '_parameters')
+
+    _parameter_cls = Parameter
+    _bound_arguments_cls = BoundArguments
+
+    empty = _empty
+
+    def __init__(self, parameters=None, return_annotation=_empty,
+                 __validate_parameters__=True):
+        '''Constructs Signature from the given list of Parameter
+        objects and 'return_annotation'.  All arguments are optional.
+        '''
+
+        if parameters is None:
+            params = OrderedDict()
+        else:
+            if __validate_parameters__:
+                params = OrderedDict()
+                top_kind = _POSITIONAL_ONLY
+
+                for idx, param in enumerate(parameters):
+                    kind = param.kind
+                    if kind < top_kind:
+                        msg = 'wrong parameter order: {0} before {1}'
+                        msg = msg.format(top_kind, param.kind)
+                        raise ValueError(msg)
+                    else:
+                        top_kind = kind
+
+                    name = param.name
+                    if name is None:
+                        name = str(idx)
+                        param = param.replace(name=name)
+
+                    if name in params:
+                        msg = 'duplicate parameter name: {0!r}'.format(name)
+                        raise ValueError(msg)
+                    params[name] = param
+            else:
+                params = OrderedDict(((param.name, param)
+                                                for param in parameters))
+
+        self._parameters = params
+        self._return_annotation = return_annotation
+
+    @classmethod
+    def from_function(cls, func):
+        '''Constructs Signature for the given python function'''
+
+        if not isinstance(func, types.FunctionType):
+            raise TypeError('{0!r} is not a Python function'.format(func))
+
+        Parameter = cls._parameter_cls
+
+        # Parameter information.
+        func_code = func.__code__
+        pos_count = func_code.co_argcount
+        arg_names = func_code.co_varnames
+        positional = tuple(arg_names[:pos_count])
+        keyword_only_count = getattr(func_code, 'co_kwonlyargcount', 0)
+        keyword_only = arg_names[pos_count:(pos_count + keyword_only_count)]
+        annotations = getattr(func, '__annotations__', {})
+        defaults = func.__defaults__
+        kwdefaults = getattr(func, '__kwdefaults__', None)
+
+        if defaults:
+            pos_default_count = len(defaults)
+        else:
+            pos_default_count = 0
+
+        parameters = []
+
+        # Non-keyword-only parameters w/o defaults.
+        non_default_count = pos_count - pos_default_count
+        for name in positional[:non_default_count]:
+            annotation = annotations.get(name, _empty)
+            parameters.append(Parameter(name, annotation=annotation,
+                                        kind=_POSITIONAL_OR_KEYWORD))
+
+        # ... w/ defaults.
+        for offset, name in enumerate(positional[non_default_count:]):
+            annotation = annotations.get(name, _empty)
+            parameters.append(Parameter(name, annotation=annotation,
+                                        kind=_POSITIONAL_OR_KEYWORD,
+                                        default=defaults[offset]))
+
+        # *args
+        if func_code.co_flags & 0x04:
+            name = arg_names[pos_count + keyword_only_count]
+            annotation = annotations.get(name, _empty)
+            parameters.append(Parameter(name, annotation=annotation,
+                                        kind=_VAR_POSITIONAL))
+
+        # Keyword-only parameters.
+        for name in keyword_only:
+            default = _empty
+            if kwdefaults is not None:
+                default = kwdefaults.get(name, _empty)
+
+            annotation = annotations.get(name, _empty)
+            parameters.append(Parameter(name, annotation=annotation,
+                                        kind=_KEYWORD_ONLY,
+                                        default=default))
+        # **kwargs
+        if func_code.co_flags & 0x08:
+            index = pos_count + keyword_only_count
+            if func_code.co_flags & 0x04:
+                index += 1
+
+            name = arg_names[index]
+            annotation = annotations.get(name, _empty)
+            parameters.append(Parameter(name, annotation=annotation,
+                                        kind=_VAR_KEYWORD))
+
+        return cls(parameters,
+                   return_annotation=annotations.get('return', _empty),
+                   __validate_parameters__=False)
+
+    @property
+    def parameters(self):
+        try:
+            return types.MappingProxyType(self._parameters)
+        except AttributeError:
+            return OrderedDict(self._parameters.items())
+
+    @property
+    def return_annotation(self):
+        return self._return_annotation
+
+    def replace(self, parameters=_void, return_annotation=_void):
+        '''Creates a customized copy of the Signature.
+        Pass 'parameters' and/or 'return_annotation' arguments
+        to override them in the new copy.
+        '''
+
+        if parameters is _void:
+            parameters = self.parameters.values()
+
+        if return_annotation is _void:
+            return_annotation = self._return_annotation
+
+        return type(self)(parameters,
+                          return_annotation=return_annotation)
+
+    def __hash__(self):
+        msg = "unhashable type: '{0}'".format(self.__class__.__name__)
+        raise TypeError(msg)
+
+    def __eq__(self, other):
+        if (not issubclass(type(other), Signature) or
+                    self.return_annotation != other.return_annotation or
+                    len(self.parameters) != len(other.parameters)):
+            return False
+
+        other_positions = dict((param, idx)
+                           for idx, param in enumerate(other.parameters.keys()))
+
+        for idx, (param_name, param) in enumerate(self.parameters.items()):
+            if param.kind == _KEYWORD_ONLY:
+                try:
+                    other_param = other.parameters[param_name]
+                except KeyError:
+                    return False
+                else:
+                    if param != other_param:
+                        return False
+            else:
+                try:
+                    other_idx = other_positions[param_name]
+                except KeyError:
+                    return False
+                else:
+                    if (idx != other_idx or
+                                    param != other.parameters[param_name]):
+                        return False
+
+        return True
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def _bind(self, args, kwargs, partial=False):
+        '''Private method.  Don't use directly.'''
+
+        arguments = OrderedDict()
+
+        parameters = iter(self.parameters.values())
+        parameters_ex = ()
+        arg_vals = iter(args)
+
+        if partial:
+            # Support for binding arguments to 'functools.partial' objects.
+            # See 'functools.partial' case in 'signature()' implementation
+            # for details.
+            for param_name, param in self.parameters.items():
+                if (param._partial_kwarg and param_name not in kwargs):
+                    # Simulating 'functools.partial' behavior
+                    kwargs[param_name] = param.default
+
+        while True:
+            # Let's iterate through the positional arguments and corresponding
+            # parameters
+            try:
+                arg_val = next(arg_vals)
+            except StopIteration:
+                # No more positional arguments
+                try:
+                    param = next(parameters)
+                except StopIteration:
+                    # No more parameters. That's it. Just need to check that
+                    # we have no `kwargs` after this while loop
+                    break
+                else:
+                    if param.kind == _VAR_POSITIONAL:
+                        # That's OK, just empty *args.  Let's start parsing
+                        # kwargs
+                        break
+                    elif param.name in kwargs:
+                        if param.kind == _POSITIONAL_ONLY:
+                            msg = '{arg!r} parameter is positional only, ' \
+                                  'but was passed as a keyword'
+                            msg = msg.format(arg=param.name)
+                            raise TypeError(msg)
+                        parameters_ex = (param,)
+                        break
+                    elif (param.kind == _VAR_KEYWORD or
+                                                param.default is not _empty):
+                        # That's fine too - we have a default value for this
+                        # parameter.  So, lets start parsing `kwargs`, starting
+                        # with the current parameter
+                        parameters_ex = (param,)
+                        break
+                    else:
+                        if partial:
+                            parameters_ex = (param,)
+                            break
+                        else:
+                            msg = '{arg!r} parameter lacking default value'
+                            msg = msg.format(arg=param.name)
+                            raise TypeError(msg)
+            else:
+                # We have a positional argument to process
+                try:
+                    param = next(parameters)
+                except StopIteration:
+                    raise TypeError('too many positional arguments')
+                else:
+                    if param.kind in (_VAR_KEYWORD, _KEYWORD_ONLY):
+                        # Looks like we have no parameter for this positional
+                        # argument
+                        raise TypeError('too many positional arguments')
+
+                    if param.kind == _VAR_POSITIONAL:
+                        # We have an '*args'-like argument, let's fill it with
+                        # all positional arguments we have left and move on to
+                        # the next phase
+                        values = [arg_val]
+                        values.extend(arg_vals)
+                        arguments[param.name] = tuple(values)
+                        break
+
+                    if param.name in kwargs:
+                        raise TypeError('multiple values for argument '
+                                        '{arg!r}'.format(arg=param.name))
+
+                    arguments[param.name] = arg_val
+
+        # Now, we iterate through the remaining parameters to process
+        # keyword arguments
+        kwargs_param = None
+        for param in itertools.chain(parameters_ex, parameters):
+            if param.kind == _POSITIONAL_ONLY:
+                # This should never happen in case of a properly built
+                # Signature object (but let's have this check here
+                # to ensure correct behaviour just in case)
+                raise TypeError('{arg!r} parameter is positional only, '
+                                'but was passed as a keyword'. \
+                                format(arg=param.name))
+
+            if param.kind == _VAR_KEYWORD:
+                # Memorize that we have a '**kwargs'-like parameter
+                kwargs_param = param
+                continue
+
+            param_name = param.name
+            try:
+                arg_val = kwargs.pop(param_name)
+            except KeyError:
+                # We have no value for this parameter.  It's fine though,
+                # if it has a default value, or it is an '*args'-like
+                # parameter, left alone by the processing of positional
+                # arguments.
+                if (not partial and param.kind != _VAR_POSITIONAL and
+                                                    param.default is _empty):
+                    raise TypeError('{arg!r} parameter lacking default value'. \
+                                    format(arg=param_name))
+
+            else:
+                arguments[param_name] = arg_val
+
+        if kwargs:
+            if kwargs_param is not None:
+                # Process our '**kwargs'-like parameter
+                arguments[kwargs_param.name] = kwargs
+            else:
+                raise TypeError('too many keyword arguments')
+
+        return self._bound_arguments_cls(self, arguments)
+
+    def bind(self, *args, **kwargs):
+        '''Get a BoundArguments object, that maps the passed `args`
+        and `kwargs` to the function's signature.  Raises `TypeError`
+        if the passed arguments can not be bound.
+        '''
+        return self._bind(args, kwargs)
+
+    def bind_partial(self, *args, **kwargs):
+        '''Get a BoundArguments object, that partially maps the
+        passed `args` and `kwargs` to the function's signature.
+        Raises `TypeError` if the passed arguments can not be bound.
+        '''
+        return self._bind(args, kwargs, partial=True)
+
+    def __str__(self):
+        result = []
+        render_kw_only_separator = True
+        for idx, param in enumerate(self.parameters.values()):
+            formatted = str(param)
+
+            kind = param.kind
+            if kind == _VAR_POSITIONAL:
+                # OK, we have an '*args'-like parameter, so we won't need
+                # a '*' to separate keyword-only arguments
+                render_kw_only_separator = False
+            elif kind == _KEYWORD_ONLY and render_kw_only_separator:
+                # We have a keyword-only parameter to render and we haven't
+                # rendered an '*args'-like parameter before, so add a '*'
+                # separator to the parameters list ("foo(arg1, *, arg2)" case)
+                result.append('*')
+                # This condition should be only triggered once, so
+                # reset the flag
+                render_kw_only_separator = False
+
+            result.append(formatted)
+
+        rendered = '({0})'.format(', '.join(result))
+
+        if self.return_annotation is not _empty:
+            anno = formatannotation(self.return_annotation)
+            rendered += ' -> {0}'.format(anno)
+
+        return rendered

graphene/pyutils/tests/test_enum.py

@@ -21,6 +21,7 @@ def test__is_dunder():
     for name in non_dunder_names:
         assert _is_dunder(name) is False
 
+
 def test__is_sunder():
     sunder_names = [
         '_i_',

graphene/relay/connection.py

@@ -2,18 +2,13 @@ import re
 from collections import Iterable, OrderedDict
 from functools import partial
 
-import six
-
 from graphql_relay import connection_from_list
 from promise import Promise, is_thenable
 
-from ..types import (AbstractType, Boolean, Enum, Int, Interface, List, NonNull, Scalar, String,
-                     Union)
+from ..types import (Boolean, Enum, Int, Interface, List, NonNull, Scalar,
+                     String, Union)
 from ..types.field import Field
-from ..types.objecttype import ObjectType, ObjectTypeMeta
-from ..types.options import Options
-from ..utils.is_base_type import is_base_type
-from ..utils.props import props
+from ..types.objecttype import ObjectType, ObjectTypeOptions
 from .node import is_node
 
 
@@ -41,56 +36,50 @@ class PageInfo(ObjectType):
     )
 
 
-class ConnectionMeta(ObjectTypeMeta):
+class ConnectionOptions(ObjectTypeOptions):
+    node = None
 
-    def __new__(cls, name, bases, attrs):
-        # Also ensure initialization is only performed for subclasses of Model
-        # (excluding Model class itself).
-        if not is_base_type(bases, ConnectionMeta):
-            return type.__new__(cls, name, bases, attrs)
 
-        options = Options(
-            attrs.pop('Meta', None),
-            name=name,
-            description=None,
-            node=None,
-        )
-        options.interfaces = ()
-        options.local_fields = OrderedDict()
+class Connection(ObjectType):
 
-        assert options.node, 'You have to provide a node in {}.Meta'.format(cls.__name__)
-        assert issubclass(options.node, (Scalar, Enum, ObjectType, Interface, Union, NonNull)), (
+    class Meta:
+        abstract = True
+
+    @classmethod
+    def __init_subclass_with_meta__(cls, node=None, name=None, **options):
+        _meta = ConnectionOptions(cls)
+        assert node, 'You have to provide a node in {}.Meta'.format(cls.__name__)
+        assert issubclass(node, (Scalar, Enum, ObjectType, Interface, Union, NonNull)), (
             'Received incompatible node "{}" for Connection {}.'
-        ).format(options.node, name)
+        ).format(node, cls.__name__)
 
-        base_name = re.sub('Connection$', '', options.name) or options.node._meta.name
-        if not options.name:
-            options.name = '{}Connection'.format(base_name)
+        base_name = re.sub('Connection$', '', name or cls.__name__) or node._meta.name
+        if not name:
+            name = '{}Connection'.format(base_name)
 
-        edge_class = attrs.pop('Edge', None)
+        edge_class = getattr(cls, 'Edge', None)
+        _node = node
 
-        class EdgeBase(AbstractType):
-            node = Field(options.node, description='The item at the end of the edge')
+        class EdgeBase(object):
+            node = Field(_node, description='The item at the end of the edge')
             cursor = String(required=True, description='A cursor for use in pagination')
 
         edge_name = '{}Edge'.format(base_name)
-        if edge_class and issubclass(edge_class, AbstractType):
-            edge = type(edge_name, (EdgeBase, edge_class, ObjectType, ), {})
+        if edge_class:
+            edge_bases = (edge_class, EdgeBase, ObjectType,)
         else:
-            edge_attrs = props(edge_class) if edge_class else {}
-            edge = type(edge_name, (EdgeBase, ObjectType, ), edge_attrs)
+            edge_bases = (EdgeBase, ObjectType,)
 
-        class ConnectionBase(AbstractType):
-            page_info = Field(PageInfo, name='pageInfo', required=True)
-            edges = NonNull(List(edge))
+        edge = type(edge_name, edge_bases, {})
+        cls.Edge = edge
 
-        bases = (ConnectionBase, ) + bases
-        attrs = dict(attrs, _meta=options, Edge=edge)
-        return ObjectTypeMeta.__new__(cls, name, bases, attrs)
-
-
-class Connection(six.with_metaclass(ConnectionMeta, ObjectType)):
-    pass
+        _meta.name = name
+        _meta.node = node
+        _meta.fields = OrderedDict([
+            ('page_info', Field(PageInfo, name='pageInfo', required=True)),
+            ('edges', Field(NonNull(List(edge)))),
+        ])
+        return super(Connection, cls).__init_subclass_with_meta__(_meta=_meta, **options)
 
 
 class IterableConnectionField(Field):
@@ -109,10 +98,13 @@ class IterableConnectionField(Field):
     @property
     def type(self):
         type = super(IterableConnectionField, self).type
-        if is_node(type):
-            connection_type = type.Connection
-        else:
         connection_type = type
+        if is_node(type):
+            raise Exception(
+                "ConnectionField's now need a explicit ConnectionType for Nodes.\n"
+                "Read more: https://github.com/graphql-python/graphene/blob/2.0/UPGRADE-v2.0.md#node-connections"
+            )
+
         assert issubclass(connection_type, Connection), (
             '{} type have to be a subclass of Connection. Received "{}".'
         ).format(self.__class__.__name__, connection_type)
@@ -138,8 +130,8 @@ class IterableConnectionField(Field):
         return connection
 
     @classmethod
-    def connection_resolver(cls, resolver, connection_type, root, args, context, info):
-        resolved = resolver(root, args, context, info)
+    def connection_resolver(cls, resolver, connection_type, root, info, **args):
+        resolved = resolver(root, info, **args)
 
         on_resolve = partial(cls.resolve_connection, connection_type, args)
         if is_thenable(resolved):

graphene/relay/mutation.py

@@ -1,68 +1,72 @@
 import re
-from functools import partial
+from collections import OrderedDict
 
-import six
+from promise import Promise, is_thenable
 
-from promise import Promise
-
-from ..types import Field, AbstractType, Argument, InputObjectType, String
-from ..types.mutation import Mutation, MutationMeta
-from ..types.objecttype import ObjectTypeMeta
-from ..utils.is_base_type import is_base_type
-from ..utils.props import props
+from ..types import Field, InputObjectType, String
+from ..types.mutation import Mutation
 
 
-class ClientIDMutationMeta(MutationMeta):
-    def __new__(cls, name, bases, attrs):
-        # Also ensure initialization is only performed for subclasses of
-        # Mutation
-        if not is_base_type(bases, ClientIDMutationMeta):
-            return type.__new__(cls, name, bases, attrs)
+class ClientIDMutation(Mutation):
 
-        input_class = attrs.pop('Input', None)
-        base_name = re.sub('Payload$', '', name)
-        if 'client_mutation_id' not in attrs:
-            attrs['client_mutation_id'] = String(name='clientMutationId')
-        cls = ObjectTypeMeta.__new__(cls, '{}Payload'.format(base_name), bases,
-                                     attrs)
+    class Meta:
+        abstract = True
+
+    @classmethod
+    def __init_subclass_with_meta__(cls, output=None, input_fields=None,
+                                    arguments=None, name=None, **options):
+        input_class = getattr(cls, 'Input', None)
+        base_name = re.sub('Payload$', '', name or cls.__name__)
+
+        assert not output, "Can't specify any output"
+        assert not arguments, "Can't specify any arguments"
+
+        bases = (InputObjectType, )
+        if input_class:
+            bases += (input_class, )
+
+        if not input_fields:
+            input_fields = {}
+
+        cls.Input = type(
+            '{}Input'.format(base_name),
+            bases,
+            OrderedDict(input_fields, client_mutation_id=String(
+                name='clientMutationId'))
+        )
+
+        arguments = OrderedDict(
+            input=cls.Input(required=True)
+            # 'client_mutation_id': String(name='clientMutationId')
+        )
         mutate_and_get_payload = getattr(cls, 'mutate_and_get_payload', None)
         if cls.mutate and cls.mutate.__func__ == ClientIDMutation.mutate.__func__:
             assert mutate_and_get_payload, (
-                "{}.mutate_and_get_payload method is required"
-                " in a ClientIDMutation.").format(name)
-        input_attrs = {}
-        bases = ()
-        if not input_class:
-            input_attrs = {}
-        elif not issubclass(input_class, AbstractType):
-            input_attrs = props(input_class)
-        else:
-            bases += (input_class, )
-        input_attrs['client_mutation_id'] = String(name='clientMutationId')
-        cls.Input = type('{}Input'.format(base_name),
-                         bases + (InputObjectType, ), input_attrs)
-        output_class = getattr(cls, 'Output', cls)
-        cls.Field = partial(
-            Field,
-            output_class,
-            resolver=cls.mutate,
-            input=Argument(cls.Input, required=True))
-        return cls
+                "{name}.mutate_and_get_payload method is required"
+                " in a ClientIDMutation.").format(name=name or cls.__name__)
 
+        if not name:
+            name = '{}Payload'.format(base_name)
+
+        super(ClientIDMutation, cls).__init_subclass_with_meta__(
+            output=None, arguments=arguments, name=name, **options)
+        cls._meta.fields['client_mutation_id'] = (
+            Field(String, name='clientMutationId')
+        )
 
-class ClientIDMutation(six.with_metaclass(ClientIDMutationMeta, Mutation)):
     @classmethod
-    def mutate(cls, root, args, context, info):
-        input = args.get('input')
-
+    def mutate(cls, root, info, input):
         def on_resolve(payload):
             try:
-                payload.client_mutation_id = input.get('clientMutationId')
+                payload.client_mutation_id = input.get('client_mutation_id')
             except:
                 raise Exception(
                     ('Cannot set client_mutation_id in the payload object {}'
                      ).format(repr(payload)))
             return payload
 
-        return Promise.resolve(
-            cls.mutate_and_get_payload(input, context, info)).then(on_resolve)
+        result = cls.mutate_and_get_payload(root, info, **input)
+        if is_thenable(result):
+            return Promise.resolve(result).then(on_resolve)
+
+        return on_resolve(result)

graphene/relay/node.py

@@ -1,12 +1,11 @@
+from collections import OrderedDict
 from functools import partial
 
-import six
-
 from graphql_relay import from_global_id, to_global_id
 
 from ..types import ID, Field, Interface, ObjectType
+from ..types.interface import InterfaceOptions
 from ..types.utils import get_type
-from ..types.interface import InterfaceMeta
 
 
 def is_node(objecttype):
@@ -22,18 +21,6 @@ def is_node(objecttype):
     return False
 
 
-def get_default_connection(cls):
-    from .connection import Connection
-    assert issubclass(cls, ObjectType), (
-        'Can only get connection type on implemented Nodes.'
-    )
-
-    class Meta:
-        node = cls
-
-    return type('{}Connection'.format(cls.__name__), (Connection,), {'Meta': Meta})
-
-
 class GlobalID(Field):
 
     def __init__(self, node=None, parent_type=None, required=True, *args, **kwargs):
@@ -42,21 +29,15 @@ class GlobalID(Field):
         self.parent_type_name = parent_type._meta.name if parent_type else None
 
     @staticmethod
-    def id_resolver(parent_resolver, node, root, args, context, info, parent_type_name=None):
-        type_id = parent_resolver(root, args, context, info)
+    def id_resolver(parent_resolver, node, root, info, parent_type_name=None, **args):
+        type_id = parent_resolver(root, info, **args)
         parent_type_name = parent_type_name or info.parent_type.name
         return node.to_global_id(parent_type_name, type_id)  # root._meta.name
 
     def get_resolver(self, parent_resolver):
-        return partial(self.id_resolver, parent_resolver, self.node, parent_type_name=self.parent_type_name)
-
-
-class NodeMeta(InterfaceMeta):
-
-    def __new__(cls, name, bases, attrs):
-        cls = InterfaceMeta.__new__(cls, name, bases, attrs)
-        cls._meta.fields['id'] = GlobalID(cls, description='The ID of the object.')
-        return cls
+        return partial(
+            self.id_resolver, parent_resolver, self.node, parent_type_name=self.parent_type_name
+        )
 
 
 class NodeField(Field):
@@ -75,10 +56,24 @@ class NodeField(Field):
         )
 
     def get_resolver(self, parent_resolver):
-        return partial(self.node_type.node_resolver, only_type=get_type(self.field_type))
+        return partial(self.node_type.node_resolver, get_type(self.field_type))
 
 
-class Node(six.with_metaclass(NodeMeta, Interface)):
+class AbstractNode(Interface):
+
+    class Meta:
+        abstract = True
+
+    @classmethod
+    def __init_subclass_with_meta__(cls, **options):
+        _meta = InterfaceOptions(cls)
+        _meta.fields = OrderedDict(
+            id=GlobalID(cls, description='The ID of the object.')
+        )
+        super(AbstractNode, cls).__init_subclass_with_meta__(_meta=_meta, **options)
+
+
+class Node(AbstractNode):
     '''An object with an ID'''
 
     @classmethod
@@ -86,11 +81,11 @@ class Node(six.with_metaclass(NodeMeta, Interface)):
         return NodeField(cls, *args, **kwargs)
 
     @classmethod
-    def node_resolver(cls, root, args, context, info, only_type=None):
-        return cls.get_node_from_global_id(args.get('id'), context, info, only_type)
+    def node_resolver(cls, only_type, root, info, id):
+        return cls.get_node_from_global_id(info, id, only_type=only_type)
 
     @classmethod
-    def get_node_from_global_id(cls, global_id, context, info, only_type=None):
+    def get_node_from_global_id(cls, info, global_id, only_type=None):
         try:
             _type, _id = cls.from_global_id(global_id)
             graphene_type = info.schema.get_type(_type).graphene_type
@@ -108,7 +103,7 @@ class Node(six.with_metaclass(NodeMeta, Interface)):
 
         get_node = getattr(graphene_type, 'get_node', None)
         if get_node:
-            return get_node(_id, context, info)
+            return get_node(info, _id)
 
     @classmethod
     def from_global_id(cls, global_id):
@@ -117,11 +112,3 @@ class Node(six.with_metaclass(NodeMeta, Interface)):
     @classmethod
     def to_global_id(cls, type, id):
         return to_global_id(type, id)
-
-    @classmethod
-    def implements(cls, objecttype):
-        get_connection = getattr(objecttype, 'get_connection', None)
-        if not get_connection:
-            get_connection = partial(get_default_connection, objecttype)
-
-        objecttype.Connection = get_connection()

graphene/relay/tests/test_connection.py

@@ -1,6 +1,7 @@
+import pytest
 
-from ...types import AbstractType, Field, List, NonNull, ObjectType, String, Argument, Int
-from ..connection import Connection, PageInfo, ConnectionField
+from ...types import Argument, Field, Int, List, NonNull, ObjectType, String
+from ..connection import Connection, ConnectionField, PageInfo
 from ..node import Node
 
 
@@ -38,7 +39,7 @@ def test_connection():
 
 
 def test_connection_inherit_abstracttype():
-    class BaseConnection(AbstractType):
+    class BaseConnection(object):
         extra = String()
 
     class MyObjectConnection(BaseConnection, Connection):
@@ -73,7 +74,7 @@ def test_edge():
 
 
 def test_edge_with_bases():
-    class BaseEdge(AbstractType):
+    class BaseEdge(object):
         extra = String()
 
     class MyObjectConnection(Connection):
@@ -96,16 +97,6 @@ def test_edge_with_bases():
     assert edge_fields['other'].type == String
 
 
-def test_edge_on_node():
-    Edge = MyObject.Connection.Edge
-    assert Edge._meta.name == 'MyObjectEdge'
-    edge_fields = Edge._meta.fields
-    assert list(edge_fields.keys()) == ['node', 'cursor']
-
-    assert isinstance(edge_fields['node'], Field)
-    assert edge_fields['node'].type == MyObject
-
-
 def test_pageinfo():
     assert PageInfo._meta.name == 'PageInfo'
     fields = PageInfo._meta.fields
@@ -114,6 +105,7 @@ def test_pageinfo():
 
 def test_connectionfield():
     class MyObjectConnection(Connection):
+
         class Meta:
             node = MyObject
 
@@ -126,8 +118,16 @@ def test_connectionfield():
     }
 
 
+def test_connectionfield_node_deprecated():
+    field = ConnectionField(MyObject)
+    with pytest.raises(Exception) as exc_info:
+        field.type
+    
+    assert "ConnectionField's now need a explicit ConnectionType for Nodes." in str(exc_info.value)
+
 def test_connectionfield_custom_args():
     class MyObjectConnection(Connection):
+
         class Meta:
             node = MyObject
 

graphene/relay/tests/test_connection_query.py

@@ -4,7 +4,7 @@ from graphql_relay.utils import base64
 from promise import Promise
 
 from ...types import ObjectType, Schema, String
-from ..connection import ConnectionField, PageInfo
+from ..connection import Connection, ConnectionField, PageInfo
 from ..node import Node
 
 letter_chars = ['A', 'B', 'C', 'D', 'E']
@@ -18,27 +18,33 @@ class Letter(ObjectType):
     letter = String()
 
 
+class LetterConnection(Connection):
+
+    class Meta:
+        node = Letter
+
+
 class Query(ObjectType):
-    letters = ConnectionField(Letter)
-    connection_letters = ConnectionField(Letter)
-    promise_letters = ConnectionField(Letter)
+    letters = ConnectionField(LetterConnection)
+    connection_letters = ConnectionField(LetterConnection)
+    promise_letters = ConnectionField(LetterConnection)
 
     node = Node.Field()
 
-    def resolve_letters(self, args, context, info):
+    def resolve_letters(self, info, **args):
         return list(letters.values())
 
-    def resolve_promise_letters(self, args, context, info):
+    def resolve_promise_letters(self, info, **args):
         return Promise.resolve(list(letters.values()))
 
-    def resolve_connection_letters(self, args, context, info):
-        return Letter.Connection(
+    def resolve_connection_letters(self, info, **args):
+        return LetterConnection(
             page_info=PageInfo(
                 has_next_page=True,
                 has_previous_page=False
             ),
             edges=[
-                Letter.Connection.Edge(
+                LetterConnection.Edge(
                     node=Letter(id=0, letter='A'),
                     cursor='a-cursor'
                 ),

graphene/relay/tests/test_global_id.py

@@ -1,8 +1,8 @@
 from graphql_relay import to_global_id
 
-from ..node import Node, GlobalID
-from ...types import NonNull, ID, ObjectType, String
+from ...types import ID, NonNull, ObjectType, String
 from ...types.definitions import GrapheneObjectType
+from ..node import GlobalID, Node
 
 
 class CustomNode(Node):
@@ -48,7 +48,7 @@ def test_global_id_defaults_to_info_parent_type():
     my_id = '1'
     gid = GlobalID()
     id_resolver = gid.get_resolver(lambda *_: my_id)
-    my_global_id = id_resolver(None, None, None, Info(User))
+    my_global_id = id_resolver(None, Info(User))
     assert my_global_id == to_global_id(User._meta.name, my_id)
 
 
@@ -56,5 +56,5 @@ def test_global_id_allows_setting_customer_parent_type():
     my_id = '1'
     gid = GlobalID(parent_type=User)
     id_resolver = gid.get_resolver(lambda *_: my_id)
-    my_global_id = id_resolver(None, None, None, None)
+    my_global_id = id_resolver(None, None)
     assert my_global_id == to_global_id(User._meta.name, my_id)

graphene/relay/tests/test_mutation.py

@@ -1,62 +1,86 @@
 import pytest
 
-from ...types import (AbstractType, Argument, Field, InputField,
-                      InputObjectType, NonNull, ObjectType, Schema)
-from ...types.scalars import String
-from ..mutation import ClientIDMutation
-from ..node import Node
 from promise import Promise
 
+from ...types import (ID, Argument, Field, InputField, InputObjectType,
+                      NonNull, ObjectType, Schema)
+from ...types.scalars import String
+from ..mutation import ClientIDMutation
 
-class SharedFields(AbstractType):
+
+class SharedFields(object):
     shared = String()
 
 
 class MyNode(ObjectType):
-    class Meta:
-        interfaces = (Node, )
-
+    # class Meta:
+    #     interfaces = (Node, )
+    id = ID()
     name = String()
 
 
 class SaySomething(ClientIDMutation):
+
     class Input:
         what = String()
 
     phrase = String()
 
     @staticmethod
-    def mutate_and_get_payload(args, context, info):
-        what = args.get('what')
+    def mutate_and_get_payload(self, info, what, client_mutation_id=None):
         return SaySomething(phrase=str(what))
 
 
-class SaySomethingPromise(ClientIDMutation):
+class FixedSaySomething(object):
+    __slots__ = 'phrase',
+
+    def __init__(self, phrase):
+        self.phrase = phrase
+
+
+class SaySomethingFixed(ClientIDMutation):
+
     class Input:
         what = String()
 
     phrase = String()
 
     @staticmethod
-    def mutate_and_get_payload(args, context, info):
-        what = args.get('what')
+    def mutate_and_get_payload(self, info, what, client_mutation_id=None):
+        return FixedSaySomething(phrase=str(what))
+
+
+class SaySomethingPromise(ClientIDMutation):
+
+    class Input:
+        what = String()
+
+    phrase = String()
+
+    @staticmethod
+    def mutate_and_get_payload(self, info, what, client_mutation_id=None):
         return Promise.resolve(SaySomething(phrase=str(what)))
 
 
+# MyEdge = MyNode.Connection.Edge
+class MyEdge(ObjectType):
+    node = Field(MyNode)
+    cursor = String()
+
+
 class OtherMutation(ClientIDMutation):
+
     class Input(SharedFields):
         additional_field = String()
 
     name = String()
-    my_node_edge = Field(MyNode.Connection.Edge)
+    my_node_edge = Field(MyEdge)
 
-    @classmethod
-    def mutate_and_get_payload(cls, args, context, info):
-        shared = args.get('shared', '')
-        additionalField = args.get('additionalField', '')
-        edge_type = MyNode.Connection.Edge
+    @staticmethod
+    def mutate_and_get_payload(self, info, shared='', additional_field='', client_mutation_id=None):
+        edge_type = MyEdge
         return OtherMutation(
-            name=shared + additionalField,
+            name=shared + additional_field,
             my_node_edge=edge_type(cursor='1', node=MyNode(name='name')))
 
 
@@ -66,6 +90,7 @@ class RootQuery(ObjectType):
 
 class Mutation(ObjectType):
     say = SaySomething.Field()
+    say_fixed = SaySomethingFixed.Field()
     say_promise = SaySomethingPromise.Field()
     other = OtherMutation.Field()
 
@@ -86,6 +111,7 @@ def test_no_mutate_and_get_payload():
 def test_mutation():
     fields = SaySomething._meta.fields
     assert list(fields.keys()) == ['phrase', 'client_mutation_id']
+    assert SaySomething._meta.name == "SaySomethingPayload"
     assert isinstance(fields['phrase'], Field)
     field = SaySomething.Field()
     assert field.type == SaySomething
@@ -146,7 +172,14 @@ def test_node_query():
     assert executed.data == {'say': {'phrase': 'hello'}}
 
 
-def test_node_query():
+def test_node_query_fixed():
+    executed = schema.execute(
+        'mutation a { sayFixed(input: {what:"hello", clientMutationId:"1"}) { phrase } }'
+    )
+    assert "Cannot set client_mutation_id in the payload object" in str(executed.errors[0])
+
+
+def test_node_query_promise():
     executed = schema.execute(
         'mutation a { sayPromise(input: {what:"hello", clientMutationId:"1"}) { phrase } }'
     )

graphene/relay/tests/test_node.py

@@ -2,12 +2,11 @@ from collections import OrderedDict
 
 from graphql_relay import to_global_id
 
-from ...types import AbstractType, ObjectType, Schema, String
-from ..connection import Connection
-from ..node import Node
+from ...types import ObjectType, Schema, String
+from ..node import Node, is_node
 
 
-class SharedNodeFields(AbstractType):
+class SharedNodeFields(object):
 
     shared = String()
     something_else = String()
@@ -23,7 +22,7 @@ class MyNode(ObjectType):
     name = String()
 
     @staticmethod
-    def get_node(id, *_):
+    def get_node(info, id):
         return MyNode(name=str(id))
 
 
@@ -37,7 +36,7 @@ class MyOtherNode(SharedNodeFields, ObjectType):
         return 'extra field info.'
 
     @staticmethod
-    def get_node(id, *_):
+    def get_node(info, id):
         return MyOtherNode(shared=str(id))
 
 
@@ -47,20 +46,14 @@ class RootQuery(ObjectType):
     only_node = Node.Field(MyNode)
     only_node_lazy = Node.Field(lambda: MyNode)
 
+
 schema = Schema(query=RootQuery, types=[MyNode, MyOtherNode])
 
 
 def test_node_good():
     assert 'id' in MyNode._meta.fields
-
-
-def test_node_get_connection():
-    connection = MyNode.Connection
-    assert issubclass(connection, Connection)
-
-
-def test_node_get_connection_dont_duplicate():
-    assert MyNode.Connection == MyNode.Connection
+    assert is_node(MyNode)
+    assert not is_node(object)
 
 
 def test_node_query():
@@ -80,6 +73,15 @@ def test_subclassed_node_query():
         [('shared', '1'), ('extraField', 'extra field info.'), ('somethingElse', '----')])})
 
 
+def test_node_requesting_non_node():
+    executed = schema.execute(
+        '{ node(id:"%s") { __typename } } ' % Node.to_global_id("RootQuery", 1)
+    )
+    assert executed.data == {
+        'node': None
+    }
+
+
 def test_node_query_incorrect_id():
     executed = schema.execute(
         '{ node(id:"%s") { ... on MyNode { name } } }' % "something:2"

graphene/relay/tests/test_node_custom.py

@@ -15,7 +15,7 @@ class CustomNode(Node):
         return id
 
     @staticmethod
-    def get_node_from_global_id(id, context, info, only_type=None):
+    def get_node_from_global_id(info, id, only_type=None):
         assert info.schema == schema
         if id in user_data:
             return user_data.get(id)

graphene/test/__init__.py

@@ -29,6 +29,7 @@ def format_execution_result(execution_result, format_error):
 
 
 class Client(object):
+
     def __init__(self, schema, format_error=None, **execute_options):
         assert isinstance(schema, Schema)
         self.schema = schema

graphene/tests/issues/test_313.py

@@ -3,9 +3,11 @@
 import graphene
 from graphene import resolve_only_args
 
+
 class Query(graphene.ObjectType):
     rand = graphene.String()
 
+
 class Success(graphene.ObjectType):
     yeah = graphene.String()
 
@@ -15,18 +17,19 @@ class Error(graphene.ObjectType):
 
 
 class CreatePostResult(graphene.Union):
+
     class Meta:
         types = [Success, Error]
 
 
 class CreatePost(graphene.Mutation):
+
     class Input:
         text = graphene.String(required=True)
 
     result = graphene.Field(CreatePostResult)
 
-    @resolve_only_args
-    def mutate(self, text):
+    def mutate(self, info, text):
         result = Success(yeah='yeah')
 
         return CreatePost(result=result)
@@ -37,6 +40,7 @@ class Mutations(graphene.ObjectType):
 
 # tests.py
 
+
 def test_create_post():
     query_string = '''
     mutation {

graphene/tests/issues/test_356.py

@@ -1,19 +1,25 @@
 # https://github.com/graphql-python/graphene/issues/356
 
 import pytest
+
 import graphene
 from graphene import relay
 
+
 class SomeTypeOne(graphene.ObjectType):
     pass
 
+
 class SomeTypeTwo(graphene.ObjectType):
     pass
 
+
 class MyUnion(graphene.Union):
+
     class Meta:
         types = (SomeTypeOne, SomeTypeTwo)
 
+
 def test_issue():
     with pytest.raises(Exception) as exc_info:
         class Query(graphene.ObjectType):

graphene/tests/issues/test_425.py

@@ -1,36 +1,25 @@
 # https://github.com/graphql-python/graphene/issues/425
-import six
+# Adapted for Graphene 2.0
 
-from graphene.utils.is_base_type import is_base_type
-
-from graphene.types.objecttype import ObjectTypeMeta, ObjectType
-from graphene.types.options import Options
-
-class SpecialObjectTypeMeta(ObjectTypeMeta):
-
-    @staticmethod
-    def __new__(cls, name, bases, attrs):
-        # Also ensure initialization is only performed for subclasses of
-        # DjangoObjectType
-        if not is_base_type(bases, SpecialObjectTypeMeta):
-            return type.__new__(cls, name, bases, attrs)
-
-        options = Options(
-            attrs.pop('Meta', None),
-            other_attr='default',
-        )
-
-        cls = ObjectTypeMeta.__new__(cls, name, bases, dict(attrs, _meta=options))
-        assert cls._meta is options
-        return cls
+from graphene.types.objecttype import ObjectType, ObjectTypeOptions
 
 
-class SpecialObjectType(six.with_metaclass(SpecialObjectTypeMeta, ObjectType)):
-    pass
+class SpecialOptions(ObjectTypeOptions):
+    other_attr = None
+
+
+class SpecialObjectType(ObjectType):
+
+    @classmethod
+    def __init_subclass_with_meta__(cls, other_attr='default', **options):
+        _meta = SpecialOptions(cls)
+        _meta.other_attr = other_attr
+        super(SpecialObjectType, cls).__init_subclass_with_meta__(_meta=_meta, **options)
 
 
 def test_special_objecttype_could_be_subclassed():
     class MyType(SpecialObjectType):
+
         class Meta:
             other_attr = 'yeah!'
 
@@ -49,5 +38,5 @@ def test_special_objecttype_inherit_meta_options():
         pass
 
     assert MyType._meta.name == 'MyType'
-    assert MyType._meta.default_resolver == None
+    assert MyType._meta.default_resolver is None
     assert MyType._meta.interfaces == ()

graphene/tests/issues/test_490.py

@@ -1,14 +1,13 @@
 # https://github.com/graphql-python/graphene/issues/313
 
 import graphene
-from graphene import resolve_only_args
 
 
 class Query(graphene.ObjectType):
     some_field = graphene.String(from_=graphene.String(name="from"))
 
-    def resolve_some_field(_, args, context, infos):
-        return args.get("from_")
+    def resolve_some_field(self, info, from_=None):
+        return from_
 
 
 def test_issue():

graphene/types/__init__.py

@@ -1,10 +1,12 @@
 # flake8: noqa
+from graphql import ResolveInfo
 
 from .objecttype import ObjectType
-from .abstracttype import AbstractType
 from .interface import Interface
 from .mutation import Mutation
 from .scalars import Scalar, String, ID, Int, Float, Boolean
+from .json import JSONString
+from .uuid import UUID
 from .schema import Schema
 from .structures import List, NonNull
 from .enum import Enum
@@ -14,10 +16,13 @@ from .argument import Argument
 from .inputobjecttype import InputObjectType
 from .dynamic import Dynamic
 from .union import Union
+from .context import Context
+
+# Deprecated
+from .abstracttype import AbstractType
 
 
 __all__ = [
-    'AbstractType',
     'ObjectType',
     'InputObjectType',
     'Interface',
@@ -31,10 +36,17 @@ __all__ = [
     'ID',
     'Int',
     'Float',
+    'JSONString',
+    'UUID',
     'Boolean',
     'List',
     'NonNull',
     'Argument',
     'Dynamic',
     'Union',
+    'Context',
+    'ResolveInfo',
+
+    # Deprecated
+    'AbstractType',
 ]

graphene/types/abstracttype.py

@@ -1,41 +1,12 @@
-import six
-
-from ..utils.is_base_type import is_base_type
-from .options import Options
-from .utils import get_base_fields, merge, yank_fields_from_attrs
+from ..utils.subclass_with_meta import SubclassWithMeta
+from ..utils.deprecated import warn_deprecation
 
 
-class AbstractTypeMeta(type):
-    '''
-    AbstractType Definition
+class AbstractType(SubclassWithMeta):
 
-    When we want to share fields across multiple types, like a Interface,
-    a ObjectType and a Input ObjectType we can use AbstractTypes for defining
-    our fields that the other types will inherit from.
-    '''
-
-    def __new__(cls, name, bases, attrs):
-        # Also ensure initialization is only performed for subclasses of
-        # AbstractType
-        if not is_base_type(bases, AbstractTypeMeta):
-            return type.__new__(cls, name, bases, attrs)
-
-        for base in bases:
-            if not issubclass(base, AbstractType) and issubclass(type(base), AbstractTypeMeta):
-                # raise Exception('You can only extend AbstractTypes after the base definition.')
-                return type.__new__(cls, name, bases, attrs)
-
-        base_fields = get_base_fields(bases, _as=None)
-
-        fields = yank_fields_from_attrs(attrs, _as=None)
-
-        options = Options(
-            fields=merge(base_fields, fields)
+    def __init_subclass__(cls, *args, **kwargs):
+        warn_deprecation(
+            "Abstract type is deprecated, please use normal object inheritance instead.\n"
+            "See more: https://github.com/graphql-python/graphene/blob/2.0/UPGRADE-v2.0.md#deprecations"
         )
-        cls = type.__new__(cls, name, bases, dict(attrs, _meta=options))
-
-        return cls
-
-
-class AbstractType(six.with_metaclass(AbstractTypeMeta)):
-    pass
+        super(AbstractType, cls).__init_subclass__(*args, **kwargs)

graphene/types/argument.py

@@ -1,9 +1,9 @@
 from collections import OrderedDict
 from itertools import chain
 
+from .dynamic import Dynamic
 from .mountedtype import MountedType
 from .structures import NonNull
-from .dynamic import Dynamic
 from .utils import get_type
 
 

graphene/types/base.py

@@ -0,0 +1,42 @@
+from ..utils.subclass_with_meta import SubclassWithMeta
+from ..utils.trim_docstring import trim_docstring
+
+
+class BaseOptions(object):
+    name = None  # type: str
+    description = None  # type: str
+
+    _frozen = False  # type: bool
+
+    def __init__(self, class_type):
+        self.class_type = class_type  # type: Type
+
+    def freeze(self):
+        self._frozen = True
+
+    def __setattr__(self, name, value):
+        if not self._frozen:
+            super(BaseOptions, self).__setattr__(name, value)
+        else:
+            raise Exception("Can't modify frozen Options {0}".format(self))
+
+    def __repr__(self):
+        return "<{} type={}>".format(self.__class__.__name__, self.class_type.__name__)
+
+
+class BaseType(SubclassWithMeta):
+
+    @classmethod
+    def create_type(cls, class_name, **options):
+        return type(class_name, (cls, ), {'Meta': options})
+
+    @classmethod
+    def __init_subclass_with_meta__(cls, name=None, description=None, _meta=None):
+        assert "_meta" not in cls.__dict__, "Can't assign directly meta"
+        if not _meta:
+            return
+        _meta.name = name or cls.__name__
+        _meta.description = description or trim_docstring(cls.__doc__)
+        _meta.freeze()
+        cls._meta = _meta
+        super(BaseType, cls).__init_subclass_with_meta__()

graphene/types/context.py

@@ -0,0 +1,4 @@
+class Context(object):
+    def __init__(self, **params):
+        for key, value in params.items():
+            setattr(self, key, value)

graphene/types/enum.py

@@ -2,15 +2,12 @@ from collections import OrderedDict
 
 import six
 
-from ..utils.is_base_type import is_base_type
-from ..utils.trim_docstring import trim_docstring
-from .options import Options
+from graphene.utils.subclass_with_meta import SubclassWithMeta_Meta
+
+from .base import BaseOptions, BaseType
 from .unmountedtype import UnmountedType
 
-try:
-    from enum import Enum as PyEnum
-except ImportError:
-    from ..pyutils.enum import Enum as PyEnum
+from ..pyutils.compat import Enum as PyEnum
 
 
 def eq_enum(self, other):
@@ -19,29 +16,18 @@ def eq_enum(self, other):
     return self.value is other
 
 
-class EnumTypeMeta(type):
+EnumType = type(PyEnum)
 
-    def __new__(cls, name, bases, attrs):
-        # Also ensure initialization is only performed for subclasses of Model
-        # (excluding Model class itself).
-        if not is_base_type(bases, EnumTypeMeta):
-            return type.__new__(cls, name, bases, attrs)
 
-        options = Options(
-            attrs.pop('Meta', None),
-            name=name,
-            description=trim_docstring(attrs.get('__doc__')),
-            enum=None,
-        )
-        if not options.enum:
-            attrs['__eq__'] = eq_enum
-            options.enum = PyEnum(cls.__name__, attrs)
+class EnumOptions(BaseOptions):
+    enum = None  # type: Enum
 
-        new_attrs = OrderedDict(attrs, _meta=options, **options.enum.__members__)
-        return type.__new__(cls, name, bases, new_attrs)
 
-    def __prepare__(name, bases, **kwargs):  # noqa: N805
-        return OrderedDict()
+class EnumMeta(SubclassWithMeta_Meta):
+
+    def __new__(cls, name, bases, classdict, **options):
+        enum = PyEnum(cls.__name__, OrderedDict(classdict, __eq__=eq_enum))
+        return SubclassWithMeta_Meta.__new__(cls, name, bases, OrderedDict(classdict, __enum__=enum), **options)
 
     def get(cls, value):
         return cls._meta.enum(value)
@@ -49,29 +35,30 @@ class EnumTypeMeta(type):
     def __getitem__(cls, value):
         return cls._meta.enum[value]
 
+    def __prepare__(name, bases, **kwargs):  # noqa: N805
+        return OrderedDict()
+
     def __call__(cls, *args, **kwargs):  # noqa: N805
         if cls is Enum:
             description = kwargs.pop('description', None)
             return cls.from_enum(PyEnum(*args, **kwargs), description=description)
-        return super(EnumTypeMeta, cls).__call__(*args, **kwargs)
+        return super(EnumMeta, cls).__call__(*args, **kwargs)
         # return cls._meta.enum(*args, **kwargs)
 
     def from_enum(cls, enum, description=None):  # noqa: N805
         meta_class = type('Meta', (object,), {'enum': enum, 'description': description})
         return type(meta_class.enum.__name__, (Enum,), {'Meta': meta_class})
 
-    def __str__(cls):  # noqa: N805
-        return cls._meta.name
 
+class Enum(six.with_metaclass(EnumMeta, UnmountedType, BaseType)):
 
-class Enum(six.with_metaclass(EnumTypeMeta, UnmountedType)):
-    '''
-    Enum Type Definition
-
-    Some leaf values of requests and input values are Enums. GraphQL serializes
-    Enum values as strings, however internally Enums can be represented by any
-    kind of type, often integers.
-    '''
+    @classmethod
+    def __init_subclass_with_meta__(cls, enum=None, **options):
+        _meta = EnumOptions(cls)
+        _meta.enum = enum or cls.__enum__
+        for key, value in _meta.enum.__members__.items():
+            setattr(cls, key, value)
+        super(Enum, cls).__init_subclass_with_meta__(_meta=_meta, **options)
 
     @classmethod
     def get_type(cls):

graphene/types/field.py

@@ -8,11 +8,10 @@ from .structures import NonNull
 from .unmountedtype import UnmountedType
 from .utils import get_type
 
-
 base_type = type
 
 
-def source_resolver(source, root, args, context, info):
+def source_resolver(source, root, info, **args):
     resolved = getattr(root, source, None)
     if inspect.isfunction(resolved) or inspect.ismethod(resolved):
         return resolved()

graphene/types/generic.py

@@ -1,9 +1,9 @@
 from __future__ import unicode_literals
 
+from graphene.types.scalars import MAX_INT, MIN_INT
 from graphql.language.ast import (BooleanValue, FloatValue, IntValue,
-                                  StringValue, ListValue, ObjectValue)
+                                  ListValue, ObjectValue, StringValue)
 
-from graphene.types.scalars import MIN_INT, MAX_INT
 from .scalars import Scalar
 
 

graphene/types/inputobjecttype.py

@@ -1,45 +1,36 @@
-import six
+from collections import OrderedDict
 
-from ..utils.is_base_type import is_base_type
-from ..utils.trim_docstring import trim_docstring
-from .abstracttype import AbstractTypeMeta
+from .base import BaseOptions, BaseType
 from .inputfield import InputField
-from .options import Options
 from .unmountedtype import UnmountedType
-from .utils import get_base_fields, merge, yank_fields_from_attrs
+from .utils import yank_fields_from_attrs
 
 
-class InputObjectTypeMeta(AbstractTypeMeta):
-
-    def __new__(cls, name, bases, attrs):
-        # Also ensure initialization is only performed for subclasses of
-        # InputObjectType
-        if not is_base_type(bases, InputObjectTypeMeta):
-            return type.__new__(cls, name, bases, attrs)
-
-        options = Options(
-            attrs.pop('Meta', None),
-            name=name,
-            description=trim_docstring(attrs.get('__doc__')),
-            local_fields=None,
-        )
-
-        options.base_fields = get_base_fields(bases, _as=InputField)
-
-        if not options.local_fields:
-            options.local_fields = yank_fields_from_attrs(attrs, _as=InputField)
-
-        options.fields = merge(
-            options.base_fields,
-            options.local_fields
-        )
-        return type.__new__(cls, name, bases, dict(attrs, _meta=options))
-
-    def __str__(cls):  # noqa: N802
-        return cls._meta.name
+# For static type checking with Mypy
+MYPY = False
+if MYPY:
+    from typing import Dict, Callable  # NOQA
 
 
-class InputObjectType(six.with_metaclass(InputObjectTypeMeta, UnmountedType)):
+class InputObjectTypeOptions(BaseOptions):
+    fields = None  # type: Dict[str, InputField]
+    create_container = None  # type: Callable
+
+
+class InputObjectTypeContainer(dict, BaseType):
+    class Meta:
+        abstract = True
+
+    def __init__(self, *args, **kwargs):
+        dict.__init__(self, *args, **kwargs)
+        for key, value in self.items():
+            setattr(self, key, value)
+
+    def __init_subclass__(cls, *args, **kwargs):
+        pass
+
+
+class InputObjectType(UnmountedType, BaseType):
     '''
     Input Object Type Definition
 
@@ -49,6 +40,22 @@ class InputObjectType(six.with_metaclass(InputObjectTypeMeta, UnmountedType)):
     Using `NonNull` will ensure that a value must be provided by the query
     '''
 
+    @classmethod
+    def __init_subclass_with_meta__(cls, container=None, **options):
+        _meta = InputObjectTypeOptions(cls)
+
+        fields = OrderedDict()
+        for base in reversed(cls.__mro__):
+            fields.update(
+                yank_fields_from_attrs(base.__dict__, _as=InputField)
+            )
+
+        _meta.fields = fields
+        if container is None:
+            container = type(cls.__name__, (InputObjectTypeContainer, cls), {})
+        _meta.container = container
+        super(InputObjectType, cls).__init_subclass_with_meta__(_meta=_meta, **options)
+
     @classmethod
     def get_type(cls):
         '''

graphene/types/interface.py

@@ -1,45 +1,20 @@
-import six
+from collections import OrderedDict
 
-from ..utils.is_base_type import is_base_type
-from ..utils.trim_docstring import trim_docstring
-from .abstracttype import AbstractTypeMeta
+from .base import BaseOptions, BaseType
 from .field import Field
-from .options import Options
-from .utils import get_base_fields, merge, yank_fields_from_attrs
+from .utils import yank_fields_from_attrs
+
+# For static type checking with Mypy
+MYPY = False
+if MYPY:
+    from typing import Dict  # NOQA
 
 
-class InterfaceMeta(AbstractTypeMeta):
-
-    def __new__(cls, name, bases, attrs):
-        # Also ensure initialization is only performed for subclasses of
-        # Interface
-        if not is_base_type(bases, InterfaceMeta):
-            return type.__new__(cls, name, bases, attrs)
-
-        options = Options(
-            attrs.pop('Meta', None),
-            name=name,
-            description=trim_docstring(attrs.get('__doc__')),
-            local_fields=None,
-        )
-
-        options.base_fields = get_base_fields(bases, _as=Field)
-
-        if not options.local_fields:
-            options.local_fields = yank_fields_from_attrs(attrs, _as=Field)
-
-        options.fields = merge(
-            options.base_fields,
-            options.local_fields
-        )
-
-        return type.__new__(cls, name, bases, dict(attrs, _meta=options))
-
-    def __str__(cls):  # noqa: N802
-        return cls._meta.name
+class InterfaceOptions(BaseOptions):
+    fields = None  # type: Dict[str, Field]
 
 
-class Interface(six.with_metaclass(InterfaceMeta)):
+class Interface(BaseType):
     '''
     Interface Type Definition
 
@@ -48,16 +23,29 @@ class Interface(six.with_metaclass(InterfaceMeta)):
     all types, as well as a function to determine which type is actually used
     when the field is resolved.
     '''
+    @classmethod
+    def __init_subclass_with_meta__(cls, _meta=None, **options):
+        if not _meta:
+            _meta = InterfaceOptions(cls)
+
+        fields = OrderedDict()
+        for base in reversed(cls.__mro__):
+            fields.update(
+                yank_fields_from_attrs(base.__dict__, _as=Field)
+            )
+
+        if _meta.fields:
+            _meta.fields.update(fields)
+        else:
+            _meta.fields = fields
+
+        super(Interface, cls).__init_subclass_with_meta__(_meta=_meta, **options)
 
     @classmethod
-    def resolve_type(cls, instance, context, info):
+    def resolve_type(cls, instance, info):
         from .objecttype import ObjectType
         if isinstance(instance, ObjectType):
             return type(instance)
 
     def __init__(self, *args, **kwargs):
         raise Exception("An Interface cannot be intitialized")
-
-    @classmethod
-    def implements(cls, objecttype):
-        pass

graphene/types/mutation.py

@@ -1,33 +1,81 @@
-from functools import partial
+from collections import OrderedDict
 
-import six
-
-from ..utils.is_base_type import is_base_type
 from ..utils.get_unbound_function import get_unbound_function
 from ..utils.props import props
 from .field import Field
-from .objecttype import ObjectType, ObjectTypeMeta
+from .objecttype import ObjectType, ObjectTypeOptions
+from .utils import yank_fields_from_attrs
+from ..utils.deprecated import warn_deprecation
 
 
-class MutationMeta(ObjectTypeMeta):
-    def __new__(cls, name, bases, attrs):
-        # Also ensure initialization is only performed for subclasses of
-        # Mutation
-        if not is_base_type(bases, MutationMeta):
-            return type.__new__(cls, name, bases, attrs)
-
-        input_class = attrs.pop('Input', None)
-
-        cls = ObjectTypeMeta.__new__(cls, name, bases, attrs)
-        field_args = props(input_class) if input_class else {}
-        output_class = getattr(cls, 'Output', cls)
-        resolver = getattr(cls, 'mutate', None)
-        assert resolver, 'All mutations must define a mutate method in it'
-        resolver = get_unbound_function(resolver)
-        cls.Field = partial(
-            Field, output_class, args=field_args, resolver=resolver)
-        return cls
+# For static type checking with Mypy
+MYPY = False
+if MYPY:
+    from .argument import Argument  # NOQA
+    from typing import Dict, Type, Callable  # NOQA
 
 
-class Mutation(six.with_metaclass(MutationMeta, ObjectType)):
-    pass
+class MutationOptions(ObjectTypeOptions):
+    arguments = None  # type: Dict[str, Argument]
+    output = None  # type: Type[ObjectType]
+    resolver = None  # type: Callable
+
+
+class Mutation(ObjectType):
+    '''
+    Mutation Type Definition
+    '''
+    @classmethod
+    def __init_subclass_with_meta__(cls, resolver=None, output=None, arguments=None,
+                                    _meta=None, **options):
+        if not _meta:
+            _meta = MutationOptions(cls)
+
+        output = output or getattr(cls, 'Output', None)
+        fields = {}
+        if not output:
+            # If output is defined, we don't need to get the fields
+            fields = OrderedDict()
+            for base in reversed(cls.__mro__):
+                fields.update(
+                    yank_fields_from_attrs(base.__dict__, _as=Field)
+                )
+            output = cls
+
+        if not arguments:
+            input_class = getattr(cls, 'Arguments', None)
+            if not input_class:
+                input_class = getattr(cls, 'Input', None)
+                if input_class:
+                    warn_deprecation((
+                        "Please use {name}.Arguments instead of {name}.Input."
+                        "Input is now only used in ClientMutationID.\n"
+                        "Read more: https://github.com/graphql-python/graphene/blob/2.0/UPGRADE-v2.0.md#mutation-input"
+                    ).format(name=cls.__name__))
+
+            if input_class:
+                arguments = props(input_class)
+            else:
+                arguments = {}
+
+        if not resolver:
+            mutate = getattr(cls, 'mutate', None)
+            assert mutate, 'All mutations must define a mutate method in it'
+            resolver = get_unbound_function(mutate)
+
+        if _meta.fields:
+            _meta.fields.update(fields)
+        else:
+            _meta.fields = fields
+
+        _meta.output = output
+        _meta.resolver = resolver
+        _meta.arguments = arguments
+
+        super(Mutation, cls).__init_subclass_with_meta__(_meta=_meta, **options)
+
+    @classmethod
+    def Field(cls, *args, **kwargs):
+        return Field(
+            cls._meta.output, args=cls._meta.arguments, resolver=cls._meta.resolver
+        )

graphene/types/objecttype.py

@@ -1,82 +1,64 @@
 from collections import OrderedDict
 
-import six
-
-from ..utils.is_base_type import is_base_type
-from ..utils.trim_docstring import trim_docstring
-from .abstracttype import AbstractTypeMeta
+from .base import BaseOptions, BaseType
 from .field import Field
 from .interface import Interface
-from .options import Options
-from .utils import get_base_fields, merge, yank_fields_from_attrs
+from .utils import yank_fields_from_attrs
+
+# For static type checking with Mypy
+MYPY = False
+if MYPY:
+    from typing import Dict, Iterable, Type  # NOQA
 
 
-class ObjectTypeMeta(AbstractTypeMeta):
-
-    def __new__(cls, name, bases, attrs):
-        # Also ensure initialization is only performed for subclasses of
-        # ObjectType
-        if not is_base_type(bases, ObjectTypeMeta):
-            return type.__new__(cls, name, bases, attrs)
-
-        _meta = attrs.pop('_meta', None)
-        defaults = dict(
-            name=name,
-            description=trim_docstring(attrs.get('__doc__')),
-            interfaces=(),
-            possible_types=(),
-            default_resolver=None,
-            local_fields=OrderedDict(),
-        )
-        if not _meta:
-            options = Options(
-                attrs.pop('Meta', None),
-                **defaults
-            )
-        else:
-            options = _meta.extend_with_defaults(defaults)
-
-        options.base_fields = get_base_fields(bases, _as=Field)
-
-        if not options.local_fields:
-            options.local_fields = yank_fields_from_attrs(attrs=attrs, _as=Field)
-
-        options.interface_fields = OrderedDict()
-        for interface in options.interfaces:
-            assert issubclass(interface, Interface), (
-                'All interfaces of {} must be a subclass of Interface. Received "{}".'
-            ).format(name, interface)
-            options.interface_fields.update(interface._meta.fields)
-
-        options.fields = merge(
-            options.interface_fields,
-            options.base_fields,
-            options.local_fields
-        )
-
-        cls = type.__new__(cls, name, bases, dict(attrs, _meta=options))
-
-        assert not (options.possible_types and cls.is_type_of), (
-            '{}.Meta.possible_types will cause type collision with {}.is_type_of. '
-            'Please use one or other.'
-        ).format(name, name)
-
-        for interface in options.interfaces:
-            interface.implements(cls)
-
-        return cls
-
-    def __str__(cls):  # noqa: N802
-        return cls._meta.name
+class ObjectTypeOptions(BaseOptions):
+    fields = None  # type: Dict[str, Field]
+    interfaces = ()  # type: Iterable[Type[Interface]]
 
 
-class ObjectType(six.with_metaclass(ObjectTypeMeta)):
+class ObjectType(BaseType):
     '''
     Object Type Definition
 
     Almost all of the GraphQL types you define will be object types. Object types
     have a name, but most importantly describe their fields.
     '''
+    @classmethod
+    def __init_subclass_with_meta__(
+            cls, interfaces=(),
+            possible_types=(),
+            default_resolver=None, _meta=None, **options):
+        if not _meta:
+            _meta = ObjectTypeOptions(cls)
+
+        fields = OrderedDict()
+
+        for interface in interfaces:
+            assert issubclass(interface, Interface), (
+                'All interfaces of {} must be a subclass of Interface. Received "{}".'
+            ).format(cls.__name__, interface)
+            fields.update(interface._meta.fields)
+
+        for base in reversed(cls.__mro__):
+            fields.update(
+                yank_fields_from_attrs(base.__dict__, _as=Field)
+            )
+
+        assert not (possible_types and cls.is_type_of), (
+            '{name}.Meta.possible_types will cause type collision with {name}.is_type_of. '
+            'Please use one or other.'
+        ).format(name=cls.__name__)
+
+        if _meta.fields:
+            _meta.fields.update(fields)
+        else:
+            _meta.fields = fields
+
+        _meta.interfaces = interfaces
+        _meta.possible_types = possible_types
+        _meta.default_resolver = default_resolver
+
+        super(ObjectType, cls).__init_subclass_with_meta__(_meta=_meta, **options)
 
     is_type_of = None
 

graphene/types/options.py

@@ -1,42 +0,0 @@
-import inspect
-
-from ..utils.props import props
-
-
-class Options(object):
-    '''
-    This is the class wrapper around Meta.
-    It helps to validate and cointain the attributes inside
-    '''
-
-    def __init__(self, meta=None, **defaults):
-        if meta:
-            assert inspect.isclass(meta), (
-                'Meta have to be a class, received "{}".'.format(repr(meta))
-            )
-
-        meta_attrs = props(meta) if meta else {}
-        for attr_name, value in defaults.items():
-            if attr_name in meta_attrs:
-                value = meta_attrs.pop(attr_name)
-            setattr(self, attr_name, value)
-
-        # If meta_attrs is not empty, it implicitly means
-        # it received invalid attributes
-        if meta_attrs:
-            raise TypeError(
-                "Invalid attributes: {}".format(
-                    ', '.join(sorted(meta_attrs.keys()))
-                )
-            )
-
-    def extend_with_defaults(self, defaults):
-        for attr_name, value in defaults.items():
-            if not hasattr(self, attr_name):
-                setattr(self, attr_name, value)
-        return self
-
-    def __repr__(self):
-        options_props = props(self)
-        props_as_attrs = ' '.join(['{}={}'.format(key, value) for key, value in options_props.items()])
-        return '<Options {}>'.format(props_as_attrs)

graphene/types/resolver.py

@@ -1,8 +1,8 @@
-def attr_resolver(attname, default_value, root, args, context, info):
+def attr_resolver(attname, default_value, root, info, **args):
     return getattr(root, attname, default_value)
 
 
-def dict_resolver(attname, default_value, root, args, context, info):
+def dict_resolver(attname, default_value, root, info, **args):
     return root.get(attname, default_value)
 
 

graphene/types/scalars.py

@@ -1,34 +1,17 @@
 import six
+
 from graphql.language.ast import (BooleanValue, FloatValue, IntValue,
                                   StringValue)
 
-from ..utils.is_base_type import is_base_type
-from ..utils.trim_docstring import trim_docstring
-from .options import Options
+from .base import BaseOptions, BaseType
 from .unmountedtype import UnmountedType
 
 
-class ScalarTypeMeta(type):
-
-    def __new__(cls, name, bases, attrs):
-        # Also ensure initialization is only performed for subclasses of Model
-        # (excluding Model class itself).
-        if not is_base_type(bases, ScalarTypeMeta):
-            return type.__new__(cls, name, bases, attrs)
-
-        options = Options(
-            attrs.pop('Meta', None),
-            name=name,
-            description=trim_docstring(attrs.get('__doc__')),
-        )
-
-        return type.__new__(cls, name, bases, dict(attrs, _meta=options))
-
-    def __str__(cls):  # noqa: N802
-        return cls._meta.name
+class ScalarOptions(BaseOptions):
+    pass
 
 
-class Scalar(six.with_metaclass(ScalarTypeMeta, UnmountedType)):
+class Scalar(UnmountedType, BaseType):
     '''
     Scalar Type Definition
 
@@ -36,6 +19,10 @@ class Scalar(six.with_metaclass(ScalarTypeMeta, UnmountedType)):
     Scalars (or Enums) and are defined with a name and a series of functions
     used to parse input from ast or variables and to ensure validity.
     '''
+    @classmethod
+    def __init_subclass_with_meta__(cls, **options):
+        _meta = ScalarOptions(cls)
+        super(Scalar, cls).__init_subclass_with_meta__(_meta=_meta, **options)
 
     serialize = None
     parse_value = None
@@ -99,6 +86,7 @@ class Float(Scalar):
 
     @staticmethod
     def coerce_float(value):
+        # type: (Any) -> float
         try:
             return float(value)
         except ValueError:

graphene/types/structures.py

@@ -68,9 +68,9 @@ class NonNull(Structure):
 
     def __init__(self, *args, **kwargs):
         super(NonNull, self).__init__(*args, **kwargs)
-        assert not isinstance(self.of_type, NonNull), (
+        assert not isinstance(self._of_type, NonNull), (
             'Can only create NonNull of a Nullable GraphQLType but got: {}.'
-        ).format(self.of_type)
+        ).format(self._of_type)
 
     def __str__(self):
         return '{}!'.format(self.of_type)

graphene/types/tests/test_abstracttype.py

@@ -1,10 +1,13 @@
+import pytest
 
-from ..abstracttype import AbstractType
-from ..field import Field
+from ..objecttype import ObjectType
 from ..unmountedtype import UnmountedType
+from ..abstracttype import AbstractType
+from .. import abstracttype
+from ..field import Field
 
 
-class MyType(object):
+class MyType(ObjectType):
     pass
 
 
@@ -14,29 +17,24 @@ class MyScalar(UnmountedType):
         return MyType
 
 
-def test_generate_abstracttype_with_fields():
+def test_abstract_objecttype_warn_deprecation(mocker):
+    mocker.patch.object(abstracttype, 'warn_deprecation')
+
     class MyAbstractType(AbstractType):
-        field = Field(MyType)
+        field1 = MyScalar()
 
-    assert 'field' in MyAbstractType._meta.fields
-    assert isinstance(MyAbstractType._meta.fields['field'], Field)
+    assert abstracttype.warn_deprecation.called
 
 
-def test_generate_abstracttype_with_unmountedfields():
+def test_generate_objecttype_inherit_abstracttype():
     class MyAbstractType(AbstractType):
-        field = UnmountedType(MyType)
+        field1 = MyScalar()
 
-    assert 'field' in MyAbstractType._meta.fields
-    assert isinstance(MyAbstractType._meta.fields['field'], UnmountedType)
+    class MyObjectType(ObjectType, MyAbstractType):
+        field2 = MyScalar()
 
-
-def test_generate_abstracttype_inheritance():
-    class MyAbstractType1(AbstractType):
-        field1 = UnmountedType(MyType)
-
-    class MyAbstractType2(MyAbstractType1):
-        field2 = UnmountedType(MyType)
-
-    assert list(MyAbstractType2._meta.fields.keys()) == ['field1', 'field2']
-    assert not hasattr(MyAbstractType1, 'field1')
-    assert not hasattr(MyAbstractType2, 'field2')
+    assert MyObjectType._meta.description is None
+    assert MyObjectType._meta.interfaces == ()
+    assert MyObjectType._meta.name == "MyObjectType"
+    assert list(MyObjectType._meta.fields.keys()) == ['field1', 'field2']
+    assert list(map(type, MyObjectType._meta.fields.values())) == [Field, Field]

graphene/types/tests/test_argument.py

@@ -1,11 +1,12 @@
-import pytest
 from functools import partial
 
+import pytest
+
 from ..argument import Argument, to_arguments
 from ..field import Field
 from ..inputfield import InputField
-from ..structures import NonNull
 from ..scalars import String
+from ..structures import NonNull
 
 
 def test_argument():

graphene/types/tests/test_base.py

@@ -0,0 +1,63 @@
+import pytest
+
+from ..base import BaseType, BaseOptions
+
+
+class CustomOptions(BaseOptions):
+    pass
+
+
+class CustomType(BaseType):
+    @classmethod
+    def __init_subclass_with_meta__(cls, **options):
+        _meta = CustomOptions(cls)
+        super(CustomType, cls).__init_subclass_with_meta__(_meta=_meta, **options)
+
+
+def test_basetype():
+    class MyBaseType(CustomType):
+        pass
+    
+    assert isinstance(MyBaseType._meta, CustomOptions)
+    assert MyBaseType._meta.name == "MyBaseType"
+    assert MyBaseType._meta.description is None
+
+
+def test_basetype_nones():
+    class MyBaseType(CustomType):
+        '''Documentation'''
+        class Meta:
+            name = None
+            description = None
+
+    assert isinstance(MyBaseType._meta, CustomOptions)
+    assert MyBaseType._meta.name == "MyBaseType"
+    assert MyBaseType._meta.description == "Documentation"
+
+
+def test_basetype_custom():
+    class MyBaseType(CustomType):
+        '''Documentation'''
+        class Meta:
+            name = 'Base'
+            description = 'Desc'
+
+    assert isinstance(MyBaseType._meta, CustomOptions)
+    assert MyBaseType._meta.name == "Base"
+    assert MyBaseType._meta.description == "Desc"
+
+
+def test_basetype_create():
+    MyBaseType = CustomType.create_type('MyBaseType')
+
+    assert isinstance(MyBaseType._meta, CustomOptions)
+    assert MyBaseType._meta.name == "MyBaseType"
+    assert MyBaseType._meta.description is None
+
+
+def test_basetype_create_extra():
+    MyBaseType = CustomType.create_type('MyBaseType', name='Base', description='Desc')
+
+    assert isinstance(MyBaseType._meta, CustomOptions)
+    assert MyBaseType._meta.name == "Base"
+    assert MyBaseType._meta.description == "Desc"

graphene/types/tests/test_datetime.py

@@ -1,4 +1,5 @@
 import datetime
+
 import pytz
 
 from ..datetime import DateTime, Time
@@ -10,12 +11,11 @@ class Query(ObjectType):
     datetime = DateTime(_in=DateTime(name='in'))
     time = Time(_at=Time(name='at'))
 
-    def resolve_datetime(self, args, context, info):
-        _in = args.get('_in')
+    def resolve_datetime(self, info, _in=None):
         return _in
 
-    def resolve_time(self, args, context, info):
-        return args.get('_at')
+    def resolve_time(self, info, _at=None):
+        return _at
 
 
 schema = Schema(query=Query)

graphene/types/tests/test_definition.py

@@ -1,6 +1,5 @@
 
 
-from ..abstracttype import AbstractType
 from ..argument import Argument
 from ..enum import Enum
 from ..field import Field
@@ -296,7 +295,7 @@ def test_stringifies_simple_types():
 
 
 def test_does_not_mutate_passed_field_definitions():
-    class CommonFields(AbstractType):
+    class CommonFields(object):
         field1 = String()
         field2 = String(id=String())
 
@@ -307,12 +306,8 @@ def test_does_not_mutate_passed_field_definitions():
         pass
 
     assert TestObject1._meta.fields == TestObject2._meta.fields
-    assert CommonFields._meta.fields == {
-        'field1': String(),
-        'field2': String(id=String()),
-    }
 
-    class CommonFields(AbstractType):
+    class CommonFields(object):
         field1 = String()
         field2 = String()
 
@@ -323,8 +318,3 @@ def test_does_not_mutate_passed_field_definitions():
         pass
 
     assert TestInputObject1._meta.fields == TestInputObject2._meta.fields
-
-    assert CommonFields._meta.fields == {
-        'field1': String(),
-        'field2': String(),
-    }

graphene/types/tests/test_dynamic.py

@@ -1,6 +1,6 @@
-from ..structures import List, NonNull
-from ..scalars import String
 from ..dynamic import Dynamic
+from ..scalars import String
+from ..structures import List, NonNull
 
 
 def test_dynamic():

graphene/types/tests/test_enum.py

@@ -1,7 +1,7 @@
+from ..argument import Argument
 from ..enum import Enum, PyEnum
 from ..field import Field
 from ..inputfield import InputField
-from ..argument import Argument
 
 
 def test_enum_construction():

graphene/types/tests/test_field.py

@@ -1,10 +1,11 @@
-import pytest
 from functools import partial
 
+import pytest
+
 from ..argument import Argument
 from ..field import Field
-from ..structures import NonNull
 from ..scalars import String
+from ..structures import NonNull
 from .utils import MyLazyType
 
 
@@ -19,7 +20,8 @@ class MyInstance(object):
 def test_field_basic():
     MyType = object()
     args = {'my arg': Argument(True)}
-    resolver = lambda: None
+
+    def resolver(): return None
     deprecation_reason = 'Deprecated now'
     description = 'My Field'
     my_default = 'something'
@@ -59,7 +61,7 @@ def test_field_default_value_not_callable():
 def test_field_source():
     MyType = object()
     field = Field(MyType, source='value')
-    assert field.resolver(MyInstance, {}, None, None) == MyInstance.value
+    assert field.resolver(MyInstance(), None) == MyInstance.value
 
 
 def test_field_with_lazy_type():
@@ -83,19 +85,20 @@ def test_field_not_source_and_resolver():
     MyType = object()
     with pytest.raises(Exception) as exc_info:
         Field(MyType, source='value', resolver=lambda: None)
-    assert str(exc_info.value) == 'A Field cannot have a source and a resolver in at the same time.'
+    assert str(
+        exc_info.value) == 'A Field cannot have a source and a resolver in at the same time.'
 
 
 def test_field_source_func():
     MyType = object()
     field = Field(MyType, source='value_func')
-    assert field.resolver(MyInstance(), {}, None, None) == MyInstance.value_func()
+    assert field.resolver(MyInstance(), None) == MyInstance.value_func()
 
 
 def test_field_source_method():
     MyType = object()
     field = Field(MyType, source='value_method')
-    assert field.resolver(MyInstance(), {}, None, None) == MyInstance().value_method()
+    assert field.resolver(MyInstance(), None) == MyInstance().value_method()
 
 
 def test_field_source_as_argument():

graphene/types/tests/test_generic.py

@@ -6,8 +6,7 @@ from ..schema import Schema
 class Query(ObjectType):
     generic = GenericScalar(input=GenericScalar())
 
-    def resolve_generic(self, args, context, info):
-        input = args.get('input')
+    def resolve_generic(self, info, input=None):
         return input
 
 

graphene/types/tests/test_inputfield.py

@@ -1,4 +1,3 @@
-import pytest
 from functools import partial
 
 from ..inputfield import InputField

graphene/types/tests/test_inputobjecttype.py

@@ -1,10 +1,9 @@
 
-from ..abstracttype import AbstractType
-from ..field import Field
 from ..argument import Argument
+from ..field import Field
 from ..inputfield import InputField
-from ..objecttype import ObjectType
 from ..inputobjecttype import InputObjectType
+from ..objecttype import ObjectType
 from ..unmountedtype import UnmountedType
 
 
@@ -80,7 +79,7 @@ def test_generate_inputobjecttype_as_argument():
 
 
 def test_generate_inputobjecttype_inherit_abstracttype():
-    class MyAbstractType(AbstractType):
+    class MyAbstractType(object):
         field1 = MyScalar(MyType)
 
     class MyInputObjectType(InputObjectType, MyAbstractType):
@@ -91,7 +90,7 @@ def test_generate_inputobjecttype_inherit_abstracttype():
 
 
 def test_generate_inputobjecttype_inherit_abstracttype_reversed():
-    class MyAbstractType(AbstractType):
+    class MyAbstractType(object):
         field1 = MyScalar(MyType)
 
     class MyInputObjectType(MyAbstractType, InputObjectType):

graphene/types/tests/test_interface.py

@@ -1,5 +1,3 @@
-
-from ..abstracttype import AbstractType
 from ..field import Field
 from ..interface import Interface
 from ..unmountedtype import UnmountedType
@@ -61,7 +59,7 @@ def test_generate_interface_unmountedtype():
 
 
 def test_generate_interface_inherit_abstracttype():
-    class MyAbstractType(AbstractType):
+    class MyAbstractType(object):
         field1 = MyScalar()
 
     class MyInterface(Interface, MyAbstractType):
@@ -84,7 +82,7 @@ def test_generate_interface_inherit_interface():
 
 
 def test_generate_interface_inherit_abstracttype_reversed():
-    class MyAbstractType(AbstractType):
+    class MyAbstractType(object):
         field1 = MyScalar()
 
     class MyInterface(MyAbstractType, Interface):

graphene/types/tests/test_json.py

@@ -1,4 +1,3 @@
-import json
 
 from ..json import JSONString
 from ..objecttype import ObjectType
@@ -8,8 +7,7 @@ from ..schema import Schema
 class Query(ObjectType):
     json = JSONString(input=JSONString())
 
-    def resolve_json(self, args, context, info):
-        input = args.get('input')
+    def resolve_json(self, info, input):
         return input
 
 schema = Schema(query=Query)

graphene/types/tests/test_mountedtype.py

@@ -1,11 +1,10 @@
-import pytest
 
-from ..mountedtype import MountedType
 from ..field import Field
 from ..scalars import String
 
 
 class CustomField(Field):
+
     def __init__(self, *args, **kwargs):
         self.metadata = kwargs.pop('metadata', None)
         super(CustomField, self).__init__(*args, **kwargs)

graphene/types/tests/test_mutation.py

@@ -1,40 +1,41 @@
 import pytest
 
+from ..argument import Argument
+from ..dynamic import Dynamic
 from ..mutation import Mutation
 from ..objecttype import ObjectType
-from ..schema import Schema
-from ..argument import Argument
 from ..scalars import String
-from ..dynamic import Dynamic
+from ..schema import Schema
 
 
 def test_generate_mutation_no_args():
     class MyMutation(Mutation):
         '''Documentation'''
 
-        @classmethod
-        def mutate(cls, *args, **kwargs):
-            pass
+        def mutate(self, info, **args):
+            return args
 
     assert issubclass(MyMutation, ObjectType)
     assert MyMutation._meta.name == "MyMutation"
     assert MyMutation._meta.description == "Documentation"
-    assert MyMutation.Field().resolver == MyMutation.mutate
+    resolved = MyMutation.Field().resolver(None, None, name='Peter')
+    assert resolved == {'name': 'Peter'}
 
 
 def test_generate_mutation_with_meta():
     class MyMutation(Mutation):
+
         class Meta:
             name = 'MyOtherMutation'
             description = 'Documentation'
 
-        @classmethod
-        def mutate(cls, *args, **kwargs):
-            pass
+        def mutate(self, info, **args):
+            return args
 
     assert MyMutation._meta.name == "MyOtherMutation"
     assert MyMutation._meta.description == "Documentation"
-    assert MyMutation.Field().resolver == MyMutation.mutate
+    resolved = MyMutation.Field().resolver(None, None, name='Peter')
+    assert resolved == {'name': 'Peter'}
 
 
 def test_mutation_raises_exception_if_no_mutate():
@@ -52,24 +53,26 @@ def test_mutation_custom_output_type():
         name = String()
 
     class CreateUser(Mutation):
+
         class Input:
             name = String()
 
         Output = User
 
-        @classmethod
-        def mutate(cls, args, context, info):
-            name = args.get('name')
+        def mutate(self, info, name):
             return User(name=name)
 
     field = CreateUser.Field()
     assert field.type == User
     assert field.args == {'name': Argument(String)}
-    assert field.resolver == CreateUser.mutate
+    resolved = field.resolver(None, None, name='Peter')
+    assert isinstance(resolved, User)
+    assert resolved.name == 'Peter'
 
 
 def test_mutation_execution():
     class CreateUser(Mutation):
+
         class Input:
             name = String()
             dynamic = Dynamic(lambda: String())
@@ -78,9 +81,7 @@ def test_mutation_execution():
         name = String()
         dynamic = Dynamic(lambda: String())
 
-        def mutate(self, args, context, info):
-            name = args.get('name')
-            dynamic = args.get('dynamic')
+        def mutate(self, info, name, dynamic):
             return CreateUser(name=name, dynamic=dynamic)
 
     class Query(ObjectType):

graphene/types/tests/test_objecttype.py

@@ -1,6 +1,5 @@
 import pytest
 
-from ..abstracttype import AbstractType
 from ..field import Field
 from ..interface import Interface
 from ..objecttype import ObjectType
@@ -89,7 +88,7 @@ def test_ordered_fields_in_objecttype():
 
 
 def test_generate_objecttype_inherit_abstracttype():
-    class MyAbstractType(AbstractType):
+    class MyAbstractType(object):
         field1 = MyScalar()
 
     class MyObjectType(ObjectType, MyAbstractType):
@@ -103,7 +102,7 @@ def test_generate_objecttype_inherit_abstracttype():
 
 
 def test_generate_objecttype_inherit_abstracttype_reversed():
-    class MyAbstractType(AbstractType):
+    class MyAbstractType(object):
         field1 = MyScalar()
 
     class MyObjectType(MyAbstractType, ObjectType):
@@ -188,6 +187,7 @@ def test_generate_objecttype_description():
 
 def test_objecttype_with_possible_types():
     class MyObjectType(ObjectType):
+
         class Meta:
             possible_types = (dict, )
 
@@ -197,6 +197,7 @@ def test_objecttype_with_possible_types():
 def test_objecttype_with_possible_types_and_is_type_of_should_raise():
     with pytest.raises(AssertionError) as excinfo:
         class MyObjectType(ObjectType):
+
             class Meta:
                 possible_types = (dict, )
 

graphene/types/tests/test_options.py

@@ -1,30 +0,0 @@
-import pytest
-
-from ..options import Options
-
-
-def test_options():
-    class BaseOptions:
-        option_1 = False
-        name = True
-    meta = Options(BaseOptions, name=False, option_1=False)
-    assert meta.name == True
-    assert meta.option_1 == False
-
-
-def test_options_extra_attrs():
-    class BaseOptions:
-        name = True
-        type = True
-    
-    with pytest.raises(Exception) as exc_info:
-        meta = Options(BaseOptions)
-
-    assert str(exc_info.value) == 'Invalid attributes: name, type'
-
-
-def test_options_repr():
-    class BaseOptions:
-        name = True
-    meta = Options(BaseOptions, name=False)
-    assert repr(meta) == '<Options name=True>'

graphene/types/tests/test_query.py

@@ -1,18 +1,19 @@
 import json
 from functools import partial
 
-from graphql import Source, execute, parse, GraphQLError
+from graphql import GraphQLError, Source, execute, parse, ResolveInfo
 
+from ..dynamic import Dynamic
 from ..field import Field
-from ..interface import Interface
 from ..inputfield import InputField
 from ..inputobjecttype import InputObjectType
+from ..interface import Interface
 from ..objecttype import ObjectType
 from ..scalars import Int, String
 from ..schema import Schema
 from ..structures import List
 from ..union import Union
-from ..dynamic import Dynamic
+from ..context import Context
 
 
 def test_query():
@@ -26,6 +27,23 @@ def test_query():
     assert executed.data == {'hello': 'World'}
 
 
+def test_query_source():
+    class Root(object):
+        _hello = "World"
+
+        def hello(self):
+            return self._hello
+
+    class Query(ObjectType):
+        hello = String(source="hello")
+
+    hello_schema = Schema(Query)
+
+    executed = hello_schema.execute('{ hello }', Root())
+    assert not executed.errors
+    assert executed.data == {'hello': 'World'}
+
+
 def test_query_union():
     class one_object(object):
         pass
@@ -37,24 +55,25 @@ def test_query_union():
         one = String()
 
         @classmethod
-        def is_type_of(cls, root, context, info):
+        def is_type_of(cls, root, info):
             return isinstance(root, one_object)
 
     class Two(ObjectType):
         two = String()
 
         @classmethod
-        def is_type_of(cls, root, context, info):
+        def is_type_of(cls, root, info):
             return isinstance(root, two_object)
 
     class MyUnion(Union):
+
         class Meta:
             types = (One, Two)
 
     class Query(ObjectType):
         unions = List(MyUnion)
 
-        def resolve_unions(self, args, context, info):
+        def resolve_unions(self, info):
             return [one_object(), two_object()]
 
     hello_schema = Schema(Query)
@@ -81,29 +100,31 @@ def test_query_interface():
         base = String()
 
     class One(ObjectType):
+
         class Meta:
             interfaces = (MyInterface, )
 
         one = String()
 
         @classmethod
-        def is_type_of(cls, root, context, info):
+        def is_type_of(cls, root, info):
             return isinstance(root, one_object)
 
     class Two(ObjectType):
+
         class Meta:
             interfaces = (MyInterface, )
 
         two = String()
 
         @classmethod
-        def is_type_of(cls, root, context, info):
+        def is_type_of(cls, root, info):
             return isinstance(root, two_object)
 
     class Query(ObjectType):
         interfaces = List(MyInterface)
 
-        def resolve_interfaces(self, args, context, info):
+        def resolve_interfaces(self, info):
             return [one_object(), two_object()]
 
     hello_schema = Schema(Query, types=[One, Two])
@@ -123,13 +144,15 @@ def test_query_dynamic():
     class Query(ObjectType):
         hello = Dynamic(lambda: String(resolver=lambda *_: 'World'))
         hellos = Dynamic(lambda: List(String, resolver=lambda *_: ['Worlds']))
-        hello_field = Dynamic(lambda: Field(String, resolver=lambda *_: 'Field World'))
+        hello_field = Dynamic(lambda: Field(
+            String, resolver=lambda *_: 'Field World'))
 
     hello_schema = Schema(Query)
 
     executed = hello_schema.execute('{ hello hellos helloField }')
     assert not executed.errors
-    assert executed.data == {'hello': 'World', 'hellos': ['Worlds'], 'helloField': 'Field World'}
+    assert executed.data == {'hello': 'World', 'hellos': [
+        'Worlds'], 'helloField': 'Field World'}
 
 
 def test_query_default_value():
@@ -151,7 +174,7 @@ def test_query_wrong_default_value():
         field = String()
 
         @classmethod
-        def is_type_of(cls, root, context, info):
+        def is_type_of(cls, root, info):
             return isinstance(root, MyType)
 
     class Query(ObjectType):
@@ -161,7 +184,8 @@ def test_query_wrong_default_value():
 
     executed = hello_schema.execute('{ hello { field } }')
     assert len(executed.errors) == 1
-    assert executed.errors[0].message == GraphQLError('Expected value of type "MyType" but got: str.').message
+    assert executed.errors[0].message == GraphQLError(
+        'Expected value of type "MyType" but got: str.').message
     assert executed.data == {'hello': None}
 
 
@@ -170,7 +194,8 @@ def test_query_default_value_ignored_by_resolver():
         field = String()
 
     class Query(ObjectType):
-        hello = Field(MyType, default_value='hello', resolver=lambda *_: MyType(field='no default.'))
+        hello = Field(MyType, default_value='hello',
+                      resolver=lambda *_: MyType(field='no default.'))
 
     hello_schema = Schema(Query)
 
@@ -183,7 +208,7 @@ def test_query_resolve_function():
     class Query(ObjectType):
         hello = String()
 
-        def resolve_hello(self, args, context, info):
+        def resolve_hello(self, info):
             return 'World'
 
     hello_schema = Schema(Query)
@@ -197,7 +222,7 @@ def test_query_arguments():
     class Query(ObjectType):
         test = String(a_str=String(), a_int=Int())
 
-        def resolve_test(self, args, context, info):
+        def resolve_test(self, info, **args):
             return json.dumps([self, args], separators=(',', ':'))
 
     test_schema = Schema(Query)
@@ -210,7 +235,8 @@ def test_query_arguments():
     assert not result.errors
     assert result.data == {'test': '["Source!",{"a_str":"String!"}]'}
 
-    result = test_schema.execute('{ test(aInt: -123, aStr: "String!") }', 'Source!')
+    result = test_schema.execute(
+        '{ test(aInt: -123, aStr: "String!") }', 'Source!')
     assert not result.errors
     assert result.data in [
         {'test': '["Source!",{"a_str":"String!","a_int":-123}]'},
@@ -226,7 +252,7 @@ def test_query_input_field():
     class Query(ObjectType):
         test = String(a_input=Input())
 
-        def resolve_test(self, args, context, info):
+        def resolve_test(self, info, **args):
             return json.dumps([self, args], separators=(',', ':'))
 
     test_schema = Schema(Query)
@@ -235,13 +261,17 @@ def test_query_input_field():
     assert not result.errors
     assert result.data == {'test': '[null,{}]'}
 
-    result = test_schema.execute('{ test(aInput: {aField: "String!"} ) }', 'Source!')
+    result = test_schema.execute(
+        '{ test(aInput: {aField: "String!"} ) }', 'Source!')
     assert not result.errors
-    assert result.data == {'test': '["Source!",{"a_input":{"a_field":"String!"}}]'}
+    assert result.data == {
+        'test': '["Source!",{"a_input":{"a_field":"String!"}}]'}
 
-    result = test_schema.execute('{ test(aInput: {recursiveField: {aField: "String!"}}) }', 'Source!')
+    result = test_schema.execute(
+        '{ test(aInput: {recursiveField: {aField: "String!"}}) }', 'Source!')
     assert not result.errors
-    assert result.data == {'test': '["Source!",{"a_input":{"recursive_field":{"a_field":"String!"}}}]'}
+    assert result.data == {
+        'test': '["Source!",{"a_input":{"recursive_field":{"a_field":"String!"}}}]'}
 
 
 def test_query_middlewares():
@@ -249,10 +279,10 @@ def test_query_middlewares():
         hello = String()
         other = String()
 
-        def resolve_hello(self, args, context, info):
+        def resolve_hello(self, info):
             return 'World'
 
-        def resolve_other(self, args, context, info):
+        def resolve_other(self, info):
             return 'other'
 
     def reversed_middleware(next, *args, **kwargs):
@@ -261,27 +291,29 @@ def test_query_middlewares():
 
     hello_schema = Schema(Query)
 
-    executed = hello_schema.execute('{ hello, other }', middleware=[reversed_middleware])
+    executed = hello_schema.execute(
+        '{ hello, other }', middleware=[reversed_middleware])
     assert not executed.errors
     assert executed.data == {'hello': 'dlroW', 'other': 'rehto'}
 
 
 def test_objecttype_on_instances():
     class Ship:
+
         def __init__(self, name):
             self.name = name
 
     class ShipType(ObjectType):
         name = String(description="Ship name", required=True)
 
-        def resolve_name(self, context, args, info):
+        def resolve_name(self, info):
             # Here self will be the Ship instance returned in resolve_ship
             return self.name
 
     class Query(ObjectType):
         ship = Field(ShipType)
 
-        def resolve_ship(self, context, args, info):
+        def resolve_ship(self, info):
             return Ship(name='xwing')
 
     schema = Schema(query=Query)
@@ -296,7 +328,7 @@ def test_big_list_query_benchmark(benchmark):
     class Query(ObjectType):
         all_ints = List(Int)
 
-        def resolve_all_ints(self, args, context, info):
+        def resolve_all_ints(self, info):
             return big_list
 
     hello_schema = Schema(Query)
@@ -313,7 +345,7 @@ def test_big_list_query_compiled_query_benchmark(benchmark):
     class Query(ObjectType):
         all_ints = List(Int)
 
-        def resolve_all_ints(self, args, context, info):
+        def resolve_all_ints(self, info):
             return big_list
 
     hello_schema = Schema(Query)
@@ -335,7 +367,7 @@ def test_big_list_of_containers_query_benchmark(benchmark):
     class Query(ObjectType):
         all_containers = List(Container)
 
-        def resolve_all_containers(self, args, context, info):
+        def resolve_all_containers(self, info):
             return big_container_list
 
     hello_schema = Schema(Query)
@@ -343,7 +375,8 @@ def test_big_list_of_containers_query_benchmark(benchmark):
     big_list_query = partial(hello_schema.execute, '{ allContainers { x } }')
     result = benchmark(big_list_query)
     assert not result.errors
-    assert result.data == {'allContainers': [{'x': c.x} for c in big_container_list]}
+    assert result.data == {'allContainers': [
+        {'x': c.x} for c in big_container_list]}
 
 
 def test_big_list_of_containers_multiple_fields_query_benchmark(benchmark):
@@ -358,15 +391,17 @@ def test_big_list_of_containers_multiple_fields_query_benchmark(benchmark):
     class Query(ObjectType):
         all_containers = List(Container)
 
-        def resolve_all_containers(self, args, context, info):
+        def resolve_all_containers(self, info):
             return big_container_list
 
     hello_schema = Schema(Query)
 
-    big_list_query = partial(hello_schema.execute, '{ allContainers { x, y, z, o } }')
+    big_list_query = partial(hello_schema.execute,
+                             '{ allContainers { x, y, z, o } }')
     result = benchmark(big_list_query)
     assert not result.errors
-    assert result.data == {'allContainers': [{'x': c.x, 'y': c.y, 'z': c.z, 'o': c.o} for c in big_container_list]}
+    assert result.data == {'allContainers': [
+        {'x': c.x, 'y': c.y, 'z': c.z, 'o': c.o} for c in big_container_list]}
 
 
 def test_big_list_of_containers_multiple_fields_custom_resolvers_query_benchmark(benchmark):
@@ -376,16 +411,16 @@ def test_big_list_of_containers_multiple_fields_custom_resolvers_query_benchmark
         z = Int()
         o = Int()
 
-        def resolve_x(self, args, context, info):
+        def resolve_x(self, info):
             return self.x
 
-        def resolve_y(self, args, context, info):
+        def resolve_y(self, info):
             return self.y
 
-        def resolve_z(self, args, context, info):
+        def resolve_z(self, info):
             return self.z
 
-        def resolve_o(self, args, context, info):
+        def resolve_o(self, info):
             return self.o
 
     big_container_list = [Container(x=x, y=x, z=x, o=x) for x in range(1000)]
@@ -393,12 +428,50 @@ def test_big_list_of_containers_multiple_fields_custom_resolvers_query_benchmark
     class Query(ObjectType):
         all_containers = List(Container)
 
-        def resolve_all_containers(self, args, context, info):
+        def resolve_all_containers(self, info):
             return big_container_list
 
     hello_schema = Schema(Query)
 
-    big_list_query = partial(hello_schema.execute, '{ allContainers { x, y, z, o } }')
+    big_list_query = partial(hello_schema.execute,
+                             '{ allContainers { x, y, z, o } }')
     result = benchmark(big_list_query)
     assert not result.errors
-    assert result.data == {'allContainers': [{'x': c.x, 'y': c.y, 'z': c.z, 'o': c.o} for c in big_container_list]}
+    assert result.data == {'allContainers': [
+        {'x': c.x, 'y': c.y, 'z': c.z, 'o': c.o} for c in big_container_list]}
+
+
+def test_query_annotated_resolvers():
+    import json
+
+    context = Context(key="context")
+
+    class Query(ObjectType):
+        annotated = String(id=String())
+        context = String()
+        info = String()
+
+        def resolve_annotated(self, info, id):
+            return "{}-{}".format(self, id)
+
+        def resolve_context(self, info):
+            assert isinstance(info.context, Context)
+            return "{}-{}".format(self, info.context.key)
+
+        def resolve_info(self, info):
+            assert isinstance(info, ResolveInfo)
+            return "{}-{}".format(self, info.field_name)
+
+    test_schema = Schema(Query)
+
+    result = test_schema.execute('{ annotated(id:"self") }', "base")
+    assert not result.errors
+    assert result.data == {'annotated': 'base-self'}
+
+    result = test_schema.execute('{ context }', "base", context_value=context)
+    assert not result.errors
+    assert result.data == {'context': 'base-context'}
+
+    result = test_schema.execute('{ info }', "base")
+    assert not result.errors
+    assert result.data == {'info': 'base-info'}

graphene/types/tests/test_resolver.py

@@ -1,6 +1,6 @@
-import pytest
 
-from ..resolver import attr_resolver, dict_resolver, get_default_resolver, set_default_resolver
+from ..resolver import (attr_resolver, dict_resolver, get_default_resolver,
+                        set_default_resolver)
 
 args = {}
 context = None
@@ -16,22 +16,22 @@ class demo_obj(object):
 
 
 def test_attr_resolver():
-    resolved = attr_resolver('attr', None, demo_obj, args, context, info)
+    resolved = attr_resolver('attr', None, demo_obj, info, **args)
     assert resolved == 'value'
 
 
 def test_attr_resolver_default_value():
-    resolved = attr_resolver('attr2', 'default', demo_obj, args, context, info)
+    resolved = attr_resolver('attr2', 'default', demo_obj, info, **args)
     assert resolved == 'default'
 
 
 def test_dict_resolver():
-    resolved = dict_resolver('attr', None, demo_dict, args, context, info)
+    resolved = dict_resolver('attr', None, demo_dict, info, **args)
     assert resolved == 'value'
 
 
 def test_dict_resolver_default_value():
-    resolved = dict_resolver('attr2', 'default', demo_dict, args, context, info)
+    resolved = dict_resolver('attr2', 'default', demo_dict, info, **args)
     assert resolved == 'default'
 
 

graphene/types/tests/test_scalar.py

@@ -0,0 +1,10 @@
+
+from ..scalars import Scalar
+
+
+def test_scalar():
+    class JSONScalar(Scalar):
+        '''Documentation'''
+
+    assert JSONScalar._meta.name == "JSONScalar"
+    assert JSONScalar._meta.description == "Documentation"

graphene/types/tests/test_schema.py

@@ -1,9 +1,9 @@
 import pytest
 
-from ..schema import Schema
+from ..field import Field
 from ..objecttype import ObjectType
 from ..scalars import String
-from ..field import Field
+from ..schema import Schema
 
 
 class MyOtherType(ObjectType):

graphene/types/tests/test_structures.py

@@ -1,8 +1,9 @@
-import pytest
 from functools import partial
 
-from ..structures import List, NonNull
+import pytest
+
 from ..scalars import String
+from ..structures import List, NonNull
 from .utils import MyLazyType
 
 

graphene/types/tests/test_typemap.py

@@ -49,8 +49,8 @@ def test_objecttype():
         foo = String(bar=String(description='Argument description', default_value='x'), description='Field description')
         bar = String(name='gizmo')
 
-        def resolve_foo(self, args, info):
-            return args.get('bar')
+        def resolve_foo(self, bar):
+            return bar
 
     typemap = TypeMap([MyObjectType])
     assert 'MyObjectType' in typemap
@@ -65,7 +65,7 @@ def test_objecttype():
     assert isinstance(foo_field, GraphQLField)
     assert foo_field.description == 'Field description'
     f = MyObjectType.resolve_foo
-    assert foo_field.resolver == getattr(f, '__func__', f)
+    # assert foo_field.resolver == getattr(f, '__func__', f)
     assert foo_field.args == {
         'bar': GraphQLArgument(GraphQLString, description='Argument description', default_value='x', out_name='bar')
     }
@@ -135,9 +135,17 @@ def test_inputobject():
     assert graphql_type.name == 'MyInputObjectType'
     assert graphql_type.description == 'Description'
 
+    # Container
+    container = graphql_type.create_container({'bar': 'oh!'})
+    assert isinstance(container, MyInputObjectType)
+    assert 'bar' in container
+    assert container.bar == 'oh!'
+    assert 'foo_bar' not in container
+
     fields = graphql_type.fields
     assert list(fields.keys()) == ['fooBar', 'gizmo', 'own']
-    assert fields['own'].type == graphql_type
+    own_field = fields['own']
+    assert own_field.type == graphql_type
     foo_field = fields['fooBar']
     assert isinstance(foo_field, GraphQLInputObjectField)
     assert foo_field.description == 'Field description'
@@ -196,5 +204,5 @@ def test_objecttype_with_possible_types():
     typemap = TypeMap([MyObjectType])
     graphql_type = typemap['MyObjectType']
     assert graphql_type.is_type_of
-    assert graphql_type.is_type_of({}, None, None) is True
-    assert graphql_type.is_type_of(MyObjectType(), None, None) is False
+    assert graphql_type.is_type_of({}, None) is True
+    assert graphql_type.is_type_of(MyObjectType(), None) is False

graphene/types/tests/test_union.py

@@ -47,6 +47,7 @@ def test_generate_union_with_no_types():
 
 def test_union_can_be_mounted():
     class MyUnion(Union):
+
         class Meta:
             types = (MyObjectType1, MyObjectType2)
 

graphene/types/tests/test_uuid.py

@@ -0,0 +1,34 @@
+from ..uuid import UUID
+from ..objecttype import ObjectType
+from ..schema import Schema
+
+
+class Query(ObjectType):
+    uuid = UUID(input=UUID())
+
+    def resolve_uuid(self, info, input):
+        return input
+
+schema = Schema(query=Query)
+
+
+def test_uuidstring_query():
+    uuid_value = 'dfeb3bcf-70fd-11e7-a61a-6003088f8204'
+    result = schema.execute('''{ uuid(input: "%s") }''' % uuid_value)
+    assert not result.errors
+    assert result.data == {
+        'uuid': uuid_value
+    }
+
+
+def test_uuidstring_query_variable():
+    uuid_value = 'dfeb3bcf-70fd-11e7-a61a-6003088f8204'
+
+    result = schema.execute(
+        '''query Test($uuid: UUID){ uuid(input: $uuid) }''',
+        variable_values={'uuid': uuid_value}
+    )
+    assert not result.errors
+    assert result.data == {
+        'uuid': uuid_value
+    }

graphene/types/typemap.py

@@ -11,10 +11,10 @@ from graphql.type.typemap import GraphQLTypeMap
 
 from ..utils.get_unbound_function import get_unbound_function
 from ..utils.str_converters import to_camel_case
-from .definitions import (GrapheneEnumType, GrapheneInputObjectType,
-                          GrapheneInterfaceType, GrapheneObjectType,
-                          GrapheneScalarType, GrapheneUnionType,
-                          GrapheneGraphQLType)
+from .definitions import (GrapheneEnumType, GrapheneGraphQLType,
+                          GrapheneInputObjectType, GrapheneInterfaceType,
+                          GrapheneObjectType, GrapheneScalarType,
+                          GrapheneUnionType)
 from .dynamic import Dynamic
 from .enum import Enum
 from .field import Field
@@ -37,12 +37,12 @@ def is_graphene_type(_type):
         return True
 
 
-def resolve_type(resolve_type_func, map, type_name, root, context, info):
-    _type = resolve_type_func(root, context, info)
+def resolve_type(resolve_type_func, map, type_name, root, info):
+    _type = resolve_type_func(root, info)
 
     if not _type:
         return_type = map[type_name]
-        return get_default_resolve_type_fn(root, context, info, return_type)
+        return get_default_resolve_type_fn(root, info, return_type)
 
     if inspect.isclass(_type) and issubclass(_type, ObjectType):
         graphql_type = map.get(_type._meta.name)
@@ -54,11 +54,12 @@ def resolve_type(resolve_type_func, map, type_name, root, context, info):
     return _type
 
 
-def is_type_of_from_possible_types(possible_types, root, context, info):
+def is_type_of_from_possible_types(possible_types, root, info):
     return isinstance(root, possible_types)
 
 
 class TypeMap(GraphQLTypeMap):
+
     def __init__(self, types, auto_camelcase=True, schema=None):
         self.auto_camelcase = auto_camelcase
         self.schema = schema
@@ -194,6 +195,7 @@ class TypeMap(GraphQLTypeMap):
             graphene_type=type,
             name=type._meta.name,
             description=type._meta.description,
+            container_type=type._meta.container,
             fields=partial(
                 self.construct_fields_for_type, map, type, is_input_type=True),
         )
@@ -237,7 +239,7 @@ class TypeMap(GraphQLTypeMap):
                 _field = GraphQLInputObjectField(
                     field_type,
                     default_value=field.default_value,
-                    out_name=field.name or name,
+                    out_name=name,
                     description=field.description)
             else:
                 args = OrderedDict()
@@ -254,8 +256,12 @@ class TypeMap(GraphQLTypeMap):
                     field_type,
                     args=args,
                     resolver=field.get_resolver(
-                        self.get_resolver_for_type(type, name,
-                                                   field.default_value)),
+                        self.get_resolver_for_type(
+                            type,
+                            name,
+                            field.default_value
+                        )
+                    ),
                     deprecation_reason=field.deprecation_reason,
                     description=field.description)
             field_name = field.name or self.get_name(name)

graphene/types/union.py

@@ -1,38 +1,19 @@
-import six
-
-from ..utils.is_base_type import is_base_type
-from ..utils.trim_docstring import trim_docstring
-from .options import Options
+from .base import BaseOptions, BaseType
 from .unmountedtype import UnmountedType
 
 
-class UnionMeta(type):
-
-    def __new__(cls, name, bases, attrs):
-        # Also ensure initialization is only performed for subclasses of
-        # Union
-        if not is_base_type(bases, UnionMeta):
-            return type.__new__(cls, name, bases, attrs)
-
-        options = Options(
-            attrs.pop('Meta', None),
-            name=name,
-            description=trim_docstring(attrs.get('__doc__')),
-            types=(),
-        )
-
-        assert (
-            isinstance(options.types, (list, tuple)) and
-            len(options.types) > 0
-        ), 'Must provide types for Union {}.'.format(options.name)
-
-        return type.__new__(cls, name, bases, dict(attrs, _meta=options))
-
-    def __str__(cls):  # noqa: N805
-        return cls._meta.name
+# For static type checking with Mypy
+MYPY = False
+if MYPY:
+    from .objecttype import ObjectType  # NOQA
+    from typing import Iterable, Type  # NOQA
 
 
-class Union(six.with_metaclass(UnionMeta, UnmountedType)):
+class UnionOptions(BaseOptions):
+    types = ()  # type: Iterable[Type[ObjectType]]
+
+
+class Union(UnmountedType, BaseType):
     '''
     Union Type Definition
 
@@ -40,6 +21,16 @@ class Union(six.with_metaclass(UnionMeta, UnmountedType)):
     is used to describe what types are possible as well as providing a function
     to determine which type is actually used when the field is resolved.
     '''
+    @classmethod
+    def __init_subclass_with_meta__(cls, types=None, **options):
+        assert (
+            isinstance(types, (list, tuple)) and
+            len(types) > 0
+        ), 'Must provide types for Union {name}.'.format(name=cls.__name__)
+
+        _meta = UnionOptions(cls)
+        _meta.types = types
+        super(Union, cls).__init_subclass_with_meta__(_meta=_meta, **options)
 
     @classmethod
     def get_type(cls):
@@ -50,7 +41,7 @@ class Union(six.with_metaclass(UnionMeta, UnmountedType)):
         return cls
 
     @classmethod
-    def resolve_type(cls, instance, context, info):
-        from .objecttype import ObjectType
+    def resolve_type(cls, instance, info):
+        from .objecttype import ObjectType  # NOQA
         if isinstance(instance, ObjectType):
             return type(instance)

graphene/types/utils.py

@@ -1,6 +1,7 @@
 import inspect
 from collections import OrderedDict
 from functools import partial
+
 from six import string_types
 
 from ..utils.module_loading import import_string
@@ -8,35 +9,6 @@ from .mountedtype import MountedType
 from .unmountedtype import UnmountedType
 
 
-def merge(*dicts):
-    '''
-    Merge the dicts into one
-    '''
-    merged = OrderedDict()
-    for _dict in dicts:
-        merged.update(_dict)
-    return merged
-
-
-def get_base_fields(bases, _as=None):
-    '''
-    Get all the fields in the given bases
-    '''
-    fields = OrderedDict()
-    from ..types import AbstractType, Interface
-    # We allow inheritance in AbstractTypes and Interfaces but not ObjectTypes
-    inherited_bases = (AbstractType, Interface)
-    for base in bases:
-        if base in inherited_bases or not issubclass(base, inherited_bases):
-            continue
-        for name, field in base._meta.fields.items():
-            if name in fields:
-                continue
-            fields[name] = get_field_as(field, _as=_as)
-
-    return fields
-
-
 def get_field_as(value, _as=None):
     '''
     Get type mounted
@@ -49,7 +21,7 @@ def get_field_as(value, _as=None):
         return _as.mounted(value)
 
 
-def yank_fields_from_attrs(attrs, _as=None, delete=True, sort=True):
+def yank_fields_from_attrs(attrs, _as=None, sort=True):
     '''
     Extract all the fields in given attributes (dict)
     and return them ordered
@@ -60,8 +32,6 @@ def yank_fields_from_attrs(attrs, _as=None, delete=True, sort=True):
         if not field:
             continue
         fields_with_names.append((attname, field))
-        if delete:
-            del attrs[attname]
 
     if sort:
         fields_with_names = sorted(fields_with_names, key=lambda f: f[1])
@@ -71,6 +41,6 @@ def yank_fields_from_attrs(attrs, _as=None, delete=True, sort=True):
 def get_type(_type):
     if isinstance(_type, string_types):
         return import_string(_type)
-    if inspect.isfunction(_type) or type(_type) is partial:
+    if inspect.isfunction(_type) or isinstance(_type, partial):
         return _type()
     return _type

graphene/types/uuid.py

@@ -0,0 +1,27 @@
+from __future__ import absolute_import
+
+from uuid import UUID as _UUID
+
+from graphql.language import ast
+
+from .scalars import Scalar
+
+
+class UUID(Scalar):
+    '''UUID'''
+
+    @staticmethod
+    def serialize(uuid):
+        if isinstance(uuid, str):
+            uuid = _UUID(uuid)
+        assert isinstance(uuid, _UUID), "Expected UUID instance, received {}".format(uuid)
+        return str(uuid)
+
+    @staticmethod
+    def parse_literal(node):
+        if isinstance(node, ast.StringValue):
+            return _UUID(node.value)
+
+    @staticmethod
+    def parse_value(value):
+        return _UUID(value)

graphene/utils/annotate.py

@@ -0,0 +1,36 @@
+import six
+from ..pyutils.compat import signature, func_name
+
+from .deprecated import warn_deprecation
+
+
+def annotate(_func=None, _trigger_warning=True, **annotations):
+    if not six.PY2 and _trigger_warning:
+        warn_deprecation(
+            "annotate is intended for use in Python 2 only, as you can use type annotations Python 3.\n"
+            "Read more in https://docs.python.org/3/library/typing.html"
+        )
+
+    if not _func:
+        def _func(f):
+            return annotate(f, **annotations)
+        return _func
+
+    func_signature = signature(_func)
+
+    # We make sure the annotations are valid
+    for key, value in annotations.items():
+        assert key in func_signature.parameters, (
+            'The key {key} is not a function parameter in the function "{func_name}".'
+        ).format(
+            key=key,
+            func_name=func_name(_func)
+        )
+
+    func_annotations = getattr(_func, '__annotations__', None)
+    if func_annotations is None:
+        _func.__annotations__ = annotations
+    else:
+        _func.__annotations__.update(annotations)
+
+    return _func

graphene/utils/deprecated.py

@@ -0,0 +1,80 @@
+import functools
+import inspect
+import warnings
+
+string_types = (type(b''), type(u''))
+
+
+def warn_deprecation(text):
+    warnings.simplefilter('always', DeprecationWarning)
+    warnings.warn(
+        text,
+        category=DeprecationWarning,
+        stacklevel=2
+    )
+    warnings.simplefilter('default', DeprecationWarning)
+
+
+def deprecated(reason):
+    """
+    This is a decorator which can be used to mark functions
+    as deprecated. It will result in a warning being emitted
+    when the function is used.
+    """
+
+    if isinstance(reason, string_types):
+
+        # The @deprecated is used with a 'reason'.
+        #
+        # .. code-block:: python
+        #
+        #    @deprecated("please, use another function")
+        #    def old_function(x, y):
+        #      pass
+
+        def decorator(func1):
+
+            if inspect.isclass(func1):
+                fmt1 = "Call to deprecated class {name} ({reason})."
+            else:
+                fmt1 = "Call to deprecated function {name} ({reason})."
+
+            @functools.wraps(func1)
+            def new_func1(*args, **kwargs):
+                warn_deprecation(
+                    fmt1.format(name=func1.__name__, reason=reason),
+                )
+                return func1(*args, **kwargs)
+
+            return new_func1
+
+        return decorator
+
+    elif inspect.isclass(reason) or inspect.isfunction(reason):
+
+        # The @deprecated is used without any 'reason'.
+        #
+        # .. code-block:: python
+        #
+        #    @deprecated
+        #    def old_function(x, y):
+        #      pass
+
+        func2 = reason
+
+        if inspect.isclass(func2):
+            fmt2 = "Call to deprecated class {name}."
+        else:
+            fmt2 = "Call to deprecated function {name}."
+
+        @functools.wraps(func2)
+        def new_func2(*args, **kwargs):
+            warn_deprecation(
+                fmt2.format(name=func2.__name__),
+            )
+            return func2(*args, **kwargs)
+
+        return new_func2
+
+    else:
+        raise TypeError(repr(type(reason)))

graphene/utils/is_base_type.py

@@ -1,3 +0,0 @@
-
-def is_base_type(bases, _type):
-    return any(b for b in bases if isinstance(b, _type))

graphene/utils/resolve_only_args.py

@@ -1,8 +1,11 @@
 from functools import wraps
+from .deprecated import deprecated
 
 
+@deprecated('This function is deprecated')
 def resolve_only_args(func):
     @wraps(func)
-    def inner(root, args, context, info):
+    def wrapped_func(root, info, **args):
         return func(root, **args)
-    return inner
+
+    return wrapped_func

graphene/utils/subclass_with_meta.py

@@ -0,0 +1,44 @@
+import six
+from inspect import isclass
+
+from ..pyutils.init_subclass import InitSubclassMeta
+from .props import props
+
+
+class SubclassWithMeta_Meta(InitSubclassMeta):
+
+    def __repr__(cls):
+        return cls._meta.name
+
+
+class SubclassWithMeta(six.with_metaclass(SubclassWithMeta_Meta)):
+    """This class improves __init_subclass__ to receive automatically the options from meta"""
+    # We will only have the metaclass in Python 2
+    def __init_subclass__(cls, **meta_options):
+        """This method just terminates the super() chain"""
+        _Meta = getattr(cls, "Meta", None)
+        _meta_props = {}
+        if _Meta:
+            if isinstance(_Meta, dict):
+                _meta_props = _Meta
+            elif isclass(_Meta):
+                _meta_props = props(_Meta)
+            else:
+                raise Exception("Meta have to be either a class or a dict. Received {}".format(_Meta))
+            delattr(cls, "Meta")
+        options = dict(meta_options, **_meta_props)
+
+        abstract = options.pop('abstract', False)
+        if abstract:
+            assert not options, (
+                "Abstract types can only contain the abstract attribute. "
+                "Received: abstract, {option_keys}"
+            ).format(option_keys=', '.join(options.keys()))
+        else:
+            super_class = super(cls, cls)
+            if hasattr(super_class, '__init_subclass_with_meta__'):
+                super_class.__init_subclass_with_meta__(**options)
+
+    @classmethod
+    def __init_subclass_with_meta__(cls, **meta_options):
+        """This method just terminates the super() chain"""

graphene/utils/tests/test_annotate.py

@@ -0,0 +1,33 @@
+import pytest
+from ..annotate import annotate
+
+def func(a, b, *c, **d):
+    pass
+
+annotations = {
+    'a': int,
+    'b': str,
+    'c': list,
+    'd': dict
+}
+
+def func_with_annotations(a, b, *c, **d):
+    pass
+func_with_annotations.__annotations__ = annotations
+
+
+def test_annotate_with_no_params():
+    annotated_func = annotate(func, _trigger_warning=False)
+    assert annotated_func.__annotations__ == {}
+
+
+def test_annotate_with_params():
+    annotated_func = annotate(_trigger_warning=False, **annotations)(func)
+    assert annotated_func.__annotations__ == annotations
+
+
+def test_annotate_with_wront_params():
+    with pytest.raises(Exception) as exc_info:
+        annotated_func = annotate(p=int, _trigger_warning=False)(func)
+
+    assert str(exc_info.value) == 'The key p is not a function parameter in the function "func".'

graphene/utils/tests/test_deprecated.py

@@ -0,0 +1,65 @@
+import pytest
+from .. import deprecated
+from ..deprecated import deprecated as deprecated_decorator, warn_deprecation
+
+
+def test_warn_deprecation(mocker):
+    mocker.patch.object(deprecated.warnings, 'warn')
+    
+    warn_deprecation("OH!")
+    deprecated.warnings.warn.assert_called_with('OH!', stacklevel=2, category=DeprecationWarning)
+
+
+def test_deprecated_decorator(mocker):
+    mocker.patch.object(deprecated, 'warn_deprecation')
+    
+    @deprecated_decorator
+    def my_func():
+        return True
+
+    result = my_func()
+    assert result
+    deprecated.warn_deprecation.assert_called_with("Call to deprecated function my_func.")
+
+
+def test_deprecated_class(mocker):
+    mocker.patch.object(deprecated, 'warn_deprecation')
+    
+    @deprecated_decorator
+    class X:
+        pass
+
+    result = X()
+    assert result
+    deprecated.warn_deprecation.assert_called_with("Call to deprecated class X.")
+
+
+def test_deprecated_decorator_text(mocker):
+    mocker.patch.object(deprecated, 'warn_deprecation')
+    
+    @deprecated_decorator("Deprecation text")
+    def my_func():
+        return True
+
+    result = my_func()
+    assert result
+    deprecated.warn_deprecation.assert_called_with("Call to deprecated function my_func (Deprecation text).")
+
+
+def test_deprecated_class_text(mocker):
+    mocker.patch.object(deprecated, 'warn_deprecation')
+    
+    @deprecated_decorator("Deprecation text")
+    class X:
+        pass
+
+    result = X()
+    assert result
+    deprecated.warn_deprecation.assert_called_with("Call to deprecated class X (Deprecation text).")
+
+
+def test_deprecated_other_object(mocker):
+    mocker.patch.object(deprecated, 'warn_deprecation')
+    
+    with pytest.raises(TypeError) as exc_info:
+        deprecated_decorator({})

graphene/utils/tests/test_module_loading.py

@@ -1,16 +1,16 @@
 from pytest import raises
 
-from graphene import String
-from graphene.types.objecttype import ObjectTypeMeta
-from ..module_loading import lazy_import, import_string
+from graphene import ObjectType, String
+
+from ..module_loading import import_string, lazy_import
 
 
 def test_import_string():
     MyString = import_string('graphene.String')
     assert MyString == String
 
-    MyObjectTypeMeta = import_string('graphene.ObjectType', '__class__')
-    assert MyObjectTypeMeta == ObjectTypeMeta
+    MyObjectTypeMeta = import_string('graphene.ObjectType', '__doc__')
+    assert MyObjectTypeMeta == ObjectType.__doc__
 
 
 def test_import_string_module():
@@ -52,6 +52,6 @@ def test_lazy_import():
     MyString = f()
     assert MyString == String
 
-    f = lazy_import('graphene.ObjectType', '__class__')
+    f = lazy_import('graphene.ObjectType', '__doc__')
     MyObjectTypeMeta = f()
-    assert MyObjectTypeMeta == ObjectTypeMeta
+    assert MyObjectTypeMeta == ObjectType.__doc__

graphene/utils/tests/test_resolve_only_args.py

@@ -1,12 +1,15 @@
 from ..resolve_only_args import resolve_only_args
+from .. import deprecated
 
 
-def test_resolve_only_args():
-
-    def resolver(*args, **kwargs):
-        return kwargs
+def test_resolve_only_args(mocker):
+    mocker.patch.object(deprecated, 'warn_deprecation')
+    def resolver(root, **args):
+        return root, args
 
     my_data = {'one': 1, 'two': 2}
 
-    wrapped = resolve_only_args(resolver)
-    assert wrapped(None, my_data, None, None) == my_data
+    wrapped_resolver = resolve_only_args(resolver)
+    assert deprecated.warn_deprecation.called
+    result = wrapped_resolver(1, 2, a=3)
+    assert result == (1, {'a': 3})

graphene/utils/tests/test_trim_docstring.py

@@ -9,7 +9,6 @@ def test_trim_docstring():
 
         Multiple paragraphs too
         """
-        pass
 
     assert (trim_docstring(WellDocumentedObject.__doc__) ==
             "This object is very well-documented. It has multiple lines in its\n"