fix typed choices, make working with different Django 5x choices options

Author: GeyseR

Diff for: graphene_django/compat.py

@@ -1,10 +1,12 @@
 import sys
+from collections.abc import Callable
 from pathlib import PurePath
 
 # For backwards compatibility, we import JSONField to have it available for import via
 # this compat module (https://github.com/graphql-python/graphene-django/issues/1428).
 # Django's JSONField is available in Django 3.2+ (the minimum version we support)
-from django.db.models import JSONField
+import django
+from django.db.models import Choices, JSONField
 
 
 class MissingType:
@@ -42,3 +44,23 @@ def __init__(self, *args, **kwargs):
 
     else:
         ArrayField = MissingType
+
+
+try:
+    from django.utils.choices import normalize_choices
+except ImportError:
+
+    def normalize_choices(choices):
+        if isinstance(choices, type) and issubclass(choices, Choices):
+            choices = choices.choices
+
+        if isinstance(choices, Callable):
+            choices = choices()
+
+        # In restframework==3.15.0, choices are not passed
+        # as OrderedDict anymore, so it's safer to check
+        # for a dict
+        if isinstance(choices, dict):
+            choices = choices.items()
+
+        return choices

Diff for: graphene_django/converter.py

@@ -1,5 +1,4 @@
 import inspect
-from collections.abc import Callable
 from functools import partial, singledispatch, wraps
 
 from django.db import models
@@ -37,7 +36,7 @@
     from graphql import assert_valid_name as assert_name
 from graphql.pyutils import register_description
 
-from .compat import ArrayField, HStoreField, RangeField
+from .compat import ArrayField, HStoreField, RangeField, normalize_choices
 from .fields import DjangoConnectionField, DjangoListField
 from .settings import graphene_settings
 from .utils.str_converters import to_const
@@ -61,6 +60,24 @@ def wrapped_resolver(*args, **kwargs):
         return blank_field_wrapper(resolver)
 
 
+class EnumValueField(BlankValueField):
+    def wrap_resolve(self, parent_resolver):
+        resolver = super().wrap_resolve(parent_resolver)
+
+        # create custom resolver
+        def enum_field_wrapper(func):
+            @wraps(func)
+            def wrapped_resolver(*args, **kwargs):
+                return_value = func(*args, **kwargs)
+                if isinstance(return_value, models.Choices):
+                    return_value = return_value.value
+                return return_value
+
+            return wrapped_resolver
+
+        return enum_field_wrapper(resolver)
+
+
 def convert_choice_name(name):
     name = to_const(force_str(name))
     try:
@@ -72,15 +89,7 @@ def convert_choice_name(name):
 
 def get_choices(choices):
     converted_names = []
-    if isinstance(choices, Callable):
-        choices = choices()
-
-    # In restframework==3.15.0, choices are not passed
-    # as OrderedDict anymore, so it's safer to check
-    # for a dict
-    if isinstance(choices, dict):
-        choices = choices.items()
-
+    choices = normalize_choices(choices)
     for value, help_text in choices:
         if isinstance(help_text, (tuple, list)):
             yield from get_choices(help_text)
@@ -157,7 +166,7 @@ def convert_django_field_with_choices(
 
         converted = EnumCls(
             description=get_django_field_description(field), required=required
-        ).mount_as(BlankValueField)
+        ).mount_as(EnumValueField)
     else:
         converted = convert_django_field(field, registry)
     if registry is not None:

Diff for: graphene_django/forms/types.py

@@ -3,7 +3,7 @@
 from graphene.types.inputobjecttype import InputObjectType
 from graphene.utils.str_converters import to_camel_case
 
-from ..converter import BlankValueField
+from ..converter import EnumValueField
 from ..types import ErrorType  # noqa Import ErrorType for backwards compatibility
 from .mutation import fields_for_form
 
@@ -57,11 +57,10 @@ def mutate(_root, _info, data):
             if (
                 object_type
                 and name in object_type._meta.fields
-                and isinstance(object_type._meta.fields[name], BlankValueField)
+                and isinstance(object_type._meta.fields[name], EnumValueField)
             ):
-                # Field type BlankValueField here means that field
+                # Field type EnumValueField here means that field
                 # with choices have been converted to enum
-                # (BlankValueField is using only for that task ?)
                 setattr(cls, name, cls.get_enum_cnv_cls_instance(name, object_type))
             elif (
                 object_type

Diff for: graphene_django/tests/models.py

@@ -1,9 +1,38 @@
+import django
 from django.db import models
 from django.utils.translation import gettext_lazy as _
 
 CHOICES = ((1, "this"), (2, _("that")))
 
 
+def get_choices_as_class(choices_class):
+    if django.VERSION >= (5, 0):
+        return choices_class
+    else:
+        return choices_class.choices
+
+
+def get_choices_as_callable(choices_class):
+    if django.VERSION >= (5, 0):
+
+        def choices():
+            return choices_class.choices
+
+        return choices
+    else:
+        return choices_class.choices
+
+
+class TypedIntChoice(models.IntegerChoices):
+    CHOICE_THIS = 1
+    CHOICE_THAT = 2
+
+
+class TypedStrChoice(models.TextChoices):
+    CHOICE_THIS = "this"
+    CHOICE_THAT = "that"
+
+
 class Person(models.Model):
     name = models.CharField(max_length=30)
     parent = models.ForeignKey(
@@ -51,6 +80,21 @@ class Reporter(models.Model):
     email = models.EmailField()
     pets = models.ManyToManyField("self")
     a_choice = models.IntegerField(choices=CHOICES, null=True, blank=True)
+    typed_choice = models.IntegerField(
+        choices=TypedIntChoice.choices,
+        null=True,
+        blank=True,
+    )
+    class_choice = models.IntegerField(
+        choices=get_choices_as_class(TypedIntChoice),
+        null=True,
+        blank=True,
+    )
+    callable_choice = models.IntegerField(
+        choices=get_choices_as_callable(TypedStrChoice),
+        null=True,
+        blank=True,
+    )
     objects = models.Manager()
     doe_objects = DoeReporterManager()
     fans = models.ManyToManyField(Person)

Diff for: graphene_django/tests/test_converter.py

@@ -25,7 +25,7 @@
 )
 from ..registry import Registry
 from ..types import DjangoObjectType
-from .models import Article, Film, FilmDetails, Reporter
+from .models import Article, Film, FilmDetails, Reporter, TypedIntChoice, TypedStrChoice
 
 # from graphene.core.types.custom_scalars import DateTime, Time, JSONString
 
@@ -443,35 +443,68 @@ def test_choice_enum_blank_value():
     class ReporterType(DjangoObjectType):
         class Meta:
             model = Reporter
-            fields = (
-                "first_name",
-                "a_choice",
-            )
+            fields = ("callable_choice",)
 
     class Query(graphene.ObjectType):
         reporter = graphene.Field(ReporterType)
 
         def resolve_reporter(root, info):
-            return Reporter.objects.first()
+            # return a model instance with blank choice field value
+            return Reporter(callable_choice="")
 
     schema = graphene.Schema(query=Query)
 
-    # Create model with empty choice option
-    Reporter.objects.create(
-        first_name="Bridget", last_name="Jones", email="[email protected]"
+    result = schema.execute(
+        """
+        query {
+            reporter {
+                callableChoice
+            }
+        }
+    """
     )
+    assert not result.errors
+    assert result.data == {
+        "reporter": {"callableChoice": None},
+    }
+
+
+def test_typed_choice_value():
+    """Test that choice fields with blank values work"""
+
+    class ReporterType(DjangoObjectType):
+        class Meta:
+            model = Reporter
+            fields = ("typed_choice", "class_choice", "callable_choice")
+
+    class Query(graphene.ObjectType):
+        reporter = graphene.Field(ReporterType)
+
+        def resolve_reporter(root, info):
+            return Reporter(
+                typed_choice=TypedIntChoice.CHOICE_THIS,
+                class_choice=TypedIntChoice.CHOICE_THAT,
+                callable_choice=TypedStrChoice.CHOICE_THIS,
+            )
+
+    schema = graphene.Schema(query=Query)
 
     result = schema.execute(
         """
         query {
             reporter {
-                firstName
-                aChoice
+                typedChoice
+                classChoice
+                callableChoice
             }
         }
     """
     )
     assert not result.errors
     assert result.data == {
-        "reporter": {"firstName": "Bridget", "aChoice": None},
+        "reporter": {
+            "typedChoice": "A_1",
+            "classChoice": "A_2",
+            "callableChoice": "THIS",
+        },
     }

Diff for: graphene_django/tests/test_schema.py

@@ -40,6 +40,9 @@ class Meta:
         "email",
         "pets",
         "a_choice",
+        "typed_choice",
+        "class_choice",
+        "callable_choice",
         "fans",
         "reporter_type",
     ]

Diff for: graphene_django/tests/test_types.py

@@ -77,6 +77,9 @@ def test_django_objecttype_map_correct_fields():
         "email",
         "pets",
         "a_choice",
+        "typed_choice",
+        "class_choice",
+        "callable_choice",
         "fans",
         "reporter_type",
     ]
@@ -186,6 +189,9 @@ def test_schema_representation():
           email: String!
           pets: [Reporter!]!
           aChoice: TestsReporterAChoiceChoices
+          typedChoice: TestsReporterTypedChoiceChoices
+          classChoice: TestsReporterClassChoiceChoices
+          callableChoice: TestsReporterCallableChoiceChoices
           reporterType: TestsReporterReporterTypeChoices
           articles(offset: Int, before: String, after: String, first: Int, last: Int): ArticleConnection!
         }
@@ -199,6 +205,33 @@ def test_schema_representation():
           A_2
         }
 
+        \"""An enumeration.\"""
+        enum TestsReporterTypedChoiceChoices {
+          \"""Choice This\"""
+          A_1
+
+          \"""Choice That\"""
+          A_2
+        }
+
+        \"""An enumeration.\"""
+        enum TestsReporterClassChoiceChoices {
+          \"""Choice This\"""
+          A_1
+
+          \"""Choice That\"""
+          A_2
+        }
+
+        \"""An enumeration.\"""
+        enum TestsReporterCallableChoiceChoices {
+          \"""Choice This\"""
+          THIS
+
+          \"""Choice That\"""
+          THAT
+        }
+
         \"""An enumeration.\"""
         enum TestsReporterReporterTypeChoices {
           \"""Regular\"""