mirror of
https://github.com/graphql-python/graphene.git
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123 lines
3.0 KiB
ReStructuredText
123 lines
3.0 KiB
ReStructuredText
Graphene |Build Status| |Coverage Status|
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=========================================
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Graphene is a Python library for creating GraphQL schemas/types easly.
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It maps the models/fields to internal GraphQL objects without effort.
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Including automatic `Django models`_ conversion.
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Installation
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------------
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For instaling graphene, just run this command in your shell
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.. code:: bash
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pip install graphene
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Usage
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-----
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Example code of a GraphQL schema using Graphene:
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Schema definition
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~~~~~~~~~~~~~~~~~
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.. code:: python
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class Character(graphene.Interface):
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id = graphene.IDField()
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name = graphene.StringField()
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friends = graphene.ListField('self')
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def resolve_friends(self, args, *_):
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return [Human(f) for f in self.instance.friends]
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class Human(Character):
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homePlanet = graphene.StringField()
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class Query(graphene.ObjectType):
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human = graphene.Field(Human)
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schema = graphene.Schema(query=Query)
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Querying
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~~~~~~~~
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Querying ``graphene.Schema`` is as simple as:
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.. code:: python
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query = '''
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query HeroNameQuery {
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hero {
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name
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}
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}
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'''
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result = schema.execute(query)
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Relay Schema
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~~~~~~~~~~~~
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Graphene also supports Relay, check the `Starwars Relay example`_!
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.. code:: python
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class Ship(relay.Node):
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'''A ship in the Star Wars saga'''
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name = graphene.StringField(description='The name of the ship.')
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@classmethod
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def get_node(cls, id):
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return Ship(getShip(id))
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class Query(graphene.ObjectType):
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ships = relay.ConnectionField(Ship, description='The ships used by the faction.')
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node = relay.NodeField()
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@resolve_only_args
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def resolve_ships(self):
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return [Ship(s) for s in getShips()]
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Django+Relay Schema
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~~~~~~~~~~~~~~~~~~~
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If you want to use graphene with your Django Models check the `Starwars
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Django example`_!
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.. code:: python
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class Ship(DjangoNode):
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class Meta:
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model = YourDjangoModelHere
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# only_fields = ('id', 'name') # Only map this fields from the model
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# excluxe_fields ('field_to_excluxe', ) # Exclude mapping this fields from the model
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class Query(graphene.ObjectType):
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node = relay.NodeField()
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Contributing
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------------
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After cloning this repo, ensure dependencies are installed by running:
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.. code:: sh
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python setup.py install
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After developing, the full test suite can be evaluated by running:
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.. code:: sh
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python setup.py test # Use --pytest-args="-v -s" for verbose mode
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.. _Django models: #djangorelay-schema
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.. _Starwars Relay example: tests/starwars_relay
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.. _Starwars Django example: tests/starwars_django
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.. |Build Status| image:: https://travis-ci.org/graphql-python/graphene.svg?branch=master
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:target: https://travis-ci.org/graphql-python/graphene
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.. |Coverage Status| image:: https://coveralls.io/repos/graphql-python/graphene/badge.svg?branch=master&service=github
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:target: https://coveralls.io/github/graphql-python/graphene?branch=master
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