Pass request context to serializer from Viewset in Django Rest Framework

Question

I have a case where the values for a serializer field depend on the identity of the currently logged in user. I have seen how to add the user to the context when initializing a serializer, but I am not sure how to do this when using a ViewSet, as you only supply the serializer class and not the actual serializer instance.

Basically I would like to know how to go from:

class myModelViewSet(ModelViewSet):    queryset = myModel.objects.all()    permission_classes = [DjangoModelPermissions]    serializer_class = myModelSerializer 

to:

class myModelSerializer(serializers.ModelSerializer):     uploaded_by = serializers.SerializerMethodField()     special_field = serializers.SerializerMethodField()      class Meta:         model = myModel      def get_special_field(self, obj):         if self.context['request'].user.has_perm('something.add_something'):            return something 

Sorry if it wasn't clear, from the DOCs: Adding Extra Context Which says to do

serializer = AccountSerializer(account, context={'request': request}) serializer.data 

But I am not sure how to do that automatically from the viewset, as I only can change the serializer class, and not the serializer instance itself.

Answer 1

GenericViewSet has the get_serializer_context method which will let you update context:

class myModelViewSet(ModelViewSet):     queryset = myModel.objects.all()     permission_classes = [DjangoModelPermissions]     serializer_class = myModelSerializer      def get_serializer_context(self):         context = super(myModelViewSet, self).get_serializer_context()         context.update({"request": self.request})         return context