I experience a bug with DRF 3.16.0.
I created a minimal example:
# model.py
from django.db.models import CharField, IntegerField, Model,
UniqueConstraint
class MyModel(Model):
class Meta:
abstract = True
foo = IntegerField(null=True, blank=True)
bar = CharField(max_length=100)
class ModelWithoutUniqueConstraint(MyModel):
pass
class ModelWithUniqueConstraint(MyModel):
class Meta:
constraints = [UniqueConstraint(fields=("bar", "foo"),
name="unique_bar_and_foo", nulls_distinct=False)]
# view_rest.py
from rest_framework.fields import SerializerMethodField
from rest_framework.serializers import ModelSerializer
from rest_framework.viewsets import ReadOnlyModelViewSet
from myapp.models import ModelWithoutUniqueConstraint,
ModelWithUniqueConstraint
class BaseModelSerializer(ModelSerializer):
class Meta:
fields = ("id", "foo", "bar")
foo = SerializerMethodField()
@staticmethod
def get_foo(obj: ModelWithUniqueConstraint) -> int | None:
return obj.foo
class ModelWithUniqueConstraintSerializer(BaseModelSerializer):
class Meta(BaseModelSerializer.Meta):
model = ModelWithUniqueConstraint
class ModelWithoutUniqueConstraintSerializer(BaseModelSerializer):
class Meta(BaseModelSerializer.Meta):
model = ModelWithoutUniqueConstraint
class ModelWithUniqueConstraintViewSet(ReadOnlyModelViewSet):
queryset = ModelWithUniqueConstraint.objects.all()
serializer_class = ModelWithUniqueConstraintSerializer
class ModelWithoutUniqueConstraintViewSet(ReadOnlyModelViewSet):
queryset = ModelWithoutUniqueConstraint.objects.all()
serializer_class = ModelWithoutUniqueConstraintSerializer
In the result of ModelWithUniqueConstraintViewSet the field "foo" is lost
whith DRF 3.16. while it works with 3.15.2
My current dependencies are:
asgiref==3.8.1
attrs==25.3.0
django==5.1.7
djangorestframework==3.16.0
drf-spectacular==0.28.0
inflection==0.5.1
jsonschema==4.23.0
jsonschema-specifications==2024.10.1
pyyaml==6.0.2
referencing==0.36.2
rpds-py==0.24.0
sqlparse==0.5.3
typing-extensions==4.13.0 ; python_full_version < '3.13'
tzdata==2025.2 ; sys_platform == 'win32'
uritemplate==4.1.1
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