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83 lines
1.8 KiB
Markdown
83 lines
1.8 KiB
Markdown
# v2.0 Upgrade Guide
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* `ObjectType`, `Interface`, `InputObjectType`, `Scalar` and `Enum` implementations
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have been quite simplified, without the need of define a explicit Metaclass.
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The metaclasses threfore are now deleted as are no longer necessary, if your code was depending
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on this internal metaclass for creating custom attrs, please see an [example of how to do it now in 2.0](https://github.com/graphql-python/graphene/blob/master/graphene/tests/issues/test_425_graphene2.py).
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## Deprecations
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* AbstractType is deprecated, please use normal inheritance instead.
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Before:
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```python
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class CommonFields(AbstractType):
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name = String()
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class Pet(CommonFields, Interface):
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pass
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```
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With 2.0:
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```python
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class CommonFields(object):
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name = String()
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class Pet(CommonFields, Interface):
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pass
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```
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* Meta options as class arguments (**ONLY PYTHON 3**).
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Before:
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```python
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class Dog(ObjectType):
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class Meta:
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interfaces = [Pet]
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name = String()
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```
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With 2.0:
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```python
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class Dog(ObjectType, interfaces=[Pet]):
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name = String()
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```
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## Breaking Changes
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* Node types no longer have a `Connection` by default.
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In 2.0 and onwoards `Connection`s should be defined explicitly.
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Before:
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```python
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class User(ObjectType):
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class Meta:
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interfaces = [relay.Node]
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name = String()
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class Query(ObjectType):
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user_connection = relay.ConnectionField(User)
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```
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With 2.0:
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```python
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class User(ObjectType):
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class Meta:
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interfaces = [relay.Node]
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name = String()
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class UserConnection(relay.Connection):
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class Meta:
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node = User
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class Query(ObjectType):
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user_connection = relay.ConnectionField(UserConnection)
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```
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