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* v3.0 - remove Python 2.x from build (#983) * Change travis to only compile for p3.6+ * Changed tox to only run Python 3.6+ * Changed library classifiers to reflect support in Python 3.6+ * Changed version to 3.0.0 development In [15]: get_version((3, 0, 0, "alpha", 0)) Out[15]: '3.0.dev20190601212304' * Reorganize Tests (#985) We no longer need a dedicated folder for Python3.6+ tests We no longer need to check six.PY3 in tests * Upgrade black to 19.3b0 (#987) * Remove six dependency (#986) * No one is using func_name * Remove six simple usages * Remove six requirement * Remove `six.with_metaclass` calls * pytest-asyncio should be a regular dependency now with Py3 move * Change dependency to graphql-core-next (#988) * Changed dependencies to core-next * Converted Scalars * ResolveInfo name change * Ignore .venv * Make Schema compatible with GraphQL-core-next * Ignore more venv names and mypy and pytest caches * Remove print statements for debugging in schema test * core-next now provides out_type and out_name * Adapt date and time scalar types to core-next * Ignore the non-standard result.invalid flag * Results are named tuples in core-next (immutable) * Enum values are returned as dict in core-next * Fix mutation tests with promises * Make all 345 tests pass with graphql-core-next * Remove the compat module which was only needed for older Py version * Remove object as base class (not needed in Py 3) * We can assume that dicts are ordered in Py 3.6+ * Make use of the fact that dicts are iterable * Use consistent style of importing from pytest * Restore compatibility with graphql-relay-py v3 Add adpaters for the PageInfo and Connection args. * Avoid various deprecation warnings * Use graphql-core 3 instead of graphql-core-next * Update dependencies, reformat changes with black * Update graphene/relay/connection.py Co-Authored-By: Jonathan Kim <jkimbo@gmail.com> * Run black on setup.py * Remove trailing whitespace
72 lines
2.2 KiB
Python
72 lines
2.2 KiB
Python
from .base import BaseOptions, BaseType
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from .field import Field
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from .utils import yank_fields_from_attrs
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# For static type checking with Mypy
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MYPY = False
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if MYPY:
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from typing import Dict # NOQA
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class InterfaceOptions(BaseOptions):
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fields = None # type: Dict[str, Field]
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class Interface(BaseType):
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"""
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Interface Type Definition
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When a field can return one of a heterogeneous set of types, a Interface type
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is used to describe what types are possible, what fields are in common across
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all types, as well as a function to determine which type is actually used
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when the field is resolved.
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.. code:: python
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from graphene import Interface, String
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class HasAddress(Interface):
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class Meta:
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description = "Address fields"
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address1 = String()
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address2 = String()
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If a field returns an Interface Type, the ambiguous type of the object can be determined using
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``resolve_type`` on Interface and an ObjectType with ``Meta.possible_types`` or ``is_type_of``.
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Meta:
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name (str): Name of the GraphQL type (must be unique in schema). Defaults to class
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name.
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description (str): Description of the GraphQL type in the schema. Defaults to class
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docstring.
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fields (Dict[str, graphene.Field]): Dictionary of field name to Field. Not recommended to
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use (prefer class attributes).
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"""
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@classmethod
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def __init_subclass_with_meta__(cls, _meta=None, **options):
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if not _meta:
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_meta = InterfaceOptions(cls)
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fields = {}
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for base in reversed(cls.__mro__):
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fields.update(yank_fields_from_attrs(base.__dict__, _as=Field))
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if _meta.fields:
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_meta.fields.update(fields)
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else:
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_meta.fields = fields
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super(Interface, cls).__init_subclass_with_meta__(_meta=_meta, **options)
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@classmethod
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def resolve_type(cls, instance, info):
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from .objecttype import ObjectType
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if isinstance(instance, ObjectType):
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return type(instance)
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def __init__(self, *args, **kwargs):
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raise Exception("An Interface cannot be intitialized")
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