Integration with django-rest-polymorphic about drf-writable-nested

[gecBurton]

I am also facing the same issue. @pferreira101 I have a very nasty work around that is good enough for now that you might want

class CommonModel(PolymorphicModel):
    def __init__(self, *args, **kwargs):
        self._save_kwargs = defaultdict(dict)
        super().,__init__(*args, **kwargs)
    ... # etc

i will try and find something more satisfactory soon!

[csdenboer]

I'm having the same issue. Did you manage to solve it?

[js-moreno]

@mattkamp how did you resolve it?, i have same problem. I get same AttributeError in serializer object: object has no attribute '_save_kwargs' when i try to save nested models in a polymorphic specific resource type

[pferreira101]

I am facing the same error in an identical situation.

I am using a PolymorphicSerializer that maps 3 model serializers.

class PolySerializer(PolymorphicSerializer):
    model_serializer_mapping = {
        ModelA: ModelASerializer,
        ModelB: ModelBSerializer,
        ModelC: ModelCSerializer,
    }

Then, I have a CommonSerializer that uses the WritableNestedModelSerializer and is extended by all the serializers mapped in the PolymorphicSerializer, such as ModelASerializer.

class CommonSerializer(WritableNestedModelSerializer):
    nested_model = NestedModelSerializer()

    class Meta:
        model = CommonModel
        fields =  [ "field_1", "field_2" ]

class ModelASerializer(CommonSerializer):
    class Meta:
        model = ModelA
        fields = CommonSerializer.Meta.fields + ["field_A"]

Where CommonModel is a PolymorphicModel extended by models A, B and C.

Whenever I try to use the ModelASerializer, I get this error:
AttributeError: 'ModelASerializer' object has no attribute '_save_kwargs'