Pass extra arguments to Serializer Class in Django Rest Framework

It's very easy with "context" arg for "ModelSerializer" constructor.

For example:

in view:

my_objects = MyModelSerializer(    input_collection,     many=True,     context={'user_id': request.user.id}).data

in serializers:

class MyModelSerializer(serializers.ModelSerializer):...    is_my_object = serializers.SerializerMethodField('_is_my_find')...    def _is_my_find(self, obj):        user_id = self.context.get("user_id")        if user_id:            return user_id in obj.my_objects.values_list("user_id", flat=True)        return False...

so you can use "self.context" for getting extra params.

Reference

You could in the YourView override get_serializer_context method like that:

class YourView(GenericAPIView):    def get_serializer_context(self):        context = super().get_serializer_context()        context["customer_id"] = self.kwargs['customer_id']        context["query_params"] = self.request.query_params        return context

or like that:

class YourView(GenericAPIView):    def post(self, request, *args, **kwargs):        serializer = self.get_serializer(data=request.data)        serializer.context["customer_id"] = request.user.id        serializer.context["query_params"] = request.query_params        serializer.is_valid(raise_exception=True)        ...

and anywhere in your serializer you can get it. For example in a custom method:

class YourSerializer(ModelSerializer):    def get_alternate_name(self, obj):        customer_id = self.context["customer_id"]        query_params = self.context["query_params"]        ...

To fulfill the answer of redcyb - consider using in your view the get_serializer_context method from GenericAPIView, like this:

def get_serializer_context(self):    return {'user': self.request.user.email}