What's Changed

Extended Support for hybrid_property

In older versions, hybrid properties of an SQLAlchemy model were converted to Strings in the SQLAlchemyObjectType, unless overridden by an ORMField. This release includes support for automatic type detection based on the type hints of the method.

Old Behavior

class Interval(Base):

    id = Column(Integer, primary_key=True)
    start = Column(Integer, nullable=False)
    end = Column(Integer, nullable=False)

    @hybrid_property
    def length(self):
        return self.end - self.start

class GQLInterval(SQLAlchemyObjectType):
    class Meta:
        model = Interval

GraphQL Schema:

type Interval {
  id: ID!
  start: Int!
  end: Int!
  length: String
}

New Behavior

class Interval(Base):
    #Fields from above

    @hybrid_property
    def length(self) -> int:
        return self.end - self.start

class GQLInterval(SQLAlchemyObjectType):
    class Meta:
        model = Interval

GraphQL Schema:

type Interval {
  id: ID!
  start: Int!
  end: Int!
  length: Int
}

The feature supports all basic python types (#340) , ObjectTypes and Unions of ObjectTypes (Union[T1,T2] or 3.10-style: T1 | T2). Adding additional converters is possible similar to column type converters using @convert_sqlalchemy_hybrid_property_type.register(matcher). See converter.py for examples.

This feature is experimental and subject to extension (NonNull Support, Hybrid Methods, @property support). If you encounter an issue, see room for improvement or want to help extend the feature, please open an issue!

• Support setting @hybrid_property's return type from the functions type annotations. by @flipbit03 in https://github.com/graphql-python/graphene-sqlalchemy/pull/340
• Supplant @hybrid_property's type annotation support with Optional[T] by @flipbit03 in https://github.com/graphql-python/graphene-sqlalchemy/pull/343

Docstring Support for hybrid_property

The default behavior was changed to include the docstrings of hybrid property methods into the schema, similar to the docstrings of the column. This can be overridden using an ORMField providing an empty docstring.

• Pick up the docstrings of hybrid properties by @bim9262 in https://github.com/graphql-python/graphene-sqlalchemy/pull/344

Changes to existing Column Type converters

This PR brought updates and additions to type converters. Some type converters were adjusted to map to the correct graphene scalar type. The changes might reflect in your schema types.

Additionally, Enums are now generated from Column.key instead of Column.name. See #301

• Native support for additional Type Converters by @erikwrede in https://github.com/graphql-python/graphene-sqlalchemy/pull/353

Other changes

• Build clean up by @mvanlonden in https://github.com/graphql-python/graphene-sqlalchemy/pull/318
• I resolved spelling and capitalization mistakes in the file, README.md. by @quinnkj in https://github.com/graphql-python/graphene-sqlalchemy/pull/290
• Fix for import from graphql-relay-py (#329) by @Cito in https://github.com/graphql-python/graphene-sqlalchemy/pull/330
• Fix for issue graphql-python/graphene-sqlalchemy#288 by @jbeard4 in https://github.com/graphql-python/graphene-sqlalchemy/pull/289
• Don't suppress SQLAlchemy errors when mapping classes by @connorbrinton in https://github.com/graphql-python/graphene-sqlalchemy/pull/169
• Pick up the docstrings of hybrid properties by @bim9262 in https://github.com/graphql-python/graphene-sqlalchemy/pull/344
• Add Python 3.10 Support & update pre-commit hooks by @erikwrede in https://github.com/graphql-python/graphene-sqlalchemy/pull/352

New Contributors

• @quinnkj made their first contribution in https://github.com/graphql-python/graphene-sqlalchemy/pull/290
• @jbeard4 made their first contribution in https://github.com/graphql-python/graphene-sqlalchemy/pull/289
• @connorbrinton made their first contribution in https://github.com/graphql-python/graphene-sqlalchemy/pull/169
• @flipbit03 made their first contribution in https://github.com/graphql-python/graphene-sqlalchemy/pull/340
• @bim9262 made their first contribution in https://github.com/graphql-python/graphene-sqlalchemy/pull/344

Full Changelog: https://github.com/graphql-python/graphene-sqlalchemy/compare/3.0.0b1...3.0.0b2