Create several objects at once Django Rest Framework Generic Views

Question

I'm using Django Rest Framework. I'm trying to create a ListCreateAPIView to create several objects at once but nothing I've found so far seems to work and not sure why.

#My view
class MyListCreateView(ListCreateAPIView):
    serializer_class = MySerializer

    def get_queryset(self):
        return Mymodel.objects.filter(user=self.request.user.id)

    # tried this with no luck
    def get_serializer(self, instance=None, data=None, many=False, partial=False):
        if data is not None:
            data.is_valid(raise_exception=True)
            return super(MyListCreateView, self).get_serializer(instance=instance, data=data, many=True, partial=partial)
        else:
            return super(MyListCreateView, self).get_serializer(instance=instance, many=True, partial=partial)

    def perform_create(self, serializer):
        user_obj = self.request.user
        serializer.save(user=user_obj)

#my serializer
class MySerializer(serializers.ModelSerializer):
    class Meta:
        model = MyModel
        fields = '__all__'

Taras Mykhalchuk · Answer 1 · 2021-10-19T13:44:36.640

Let's start from the top:

This is a regular View with a dynamic many argument. Argument many itself doesn't make your serializer create multiple objects at once. For many to work as expected we need ListSerializer.

 class MyView(ListCreateAPIView):
     ...
     def create(self, request, *args, **kwargs):
         data = request.data
         serializer = MySerializer(data=data, many=isinstance(data, list))
         serializer.is_valid(raise_exception=True)
         serializer.save()

Create ListSerializer with create function like the following:

 class MyListSerializer(serializers.ListSerializer):
     ...
     def create(self, validated_data):
         items = [MyModel(**item) for item in validated_data]
         return MyModel.objects.bulk_create(items)

And finally in your main serializer's Meta class set list_serializer_class field value to MyListSerializer.

 class MySerializer(serializers.Serializer):
     ...
     def create(self, validated_data):
         return MyModel.objects.create(**validated_data)

     class Meta:
         list_serializer_class = MyListSerializer

You can read up on the custom serializer behavior here

Create several objects at once Django Rest Framework Generic Views

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