Dynamically modifying serializer fields in Django Rest Framework

Question

I'm trying to use the Advanced serializer usage described in the django rest framework documentation. http://django-rest-framework.org/api-guide/serializers.html#advanced-serializer-usage to dynamically modifying serializer field

Here is my serializer class:

class MovieSerializer(serializers.ModelSerializer):
    moviework_work = MovieWorkSerializer(many=True) 

    def __init__(self, *args, **kwargs):
        # Don't pass the 'fields' arg up to the superclass
        dropfields = kwargs.pop('dropfields', None)

        # Instantiate the superclass normally
        super(MovieSerializer, self).__init__(*args, **kwargs)

        if dropfields:
            # Drop fields specified in the `fields` argument.
            banished = set(dropfields)
            for field_name in banished:
                self.fields.pop(field_name)
    class Meta:
        model = Movie
        fields = ('field1','field2','moviework_work')

Here is my viewset

class MovieFromInterpreterViewSet(viewsets.ModelViewSet):
    queryset = Movie.objects.all()
    serializer_class = MovieSerializer(dropfields=('moviework_work',))

I get this error:

TypeError: 'MovieSerializer' object is not callable

Solution

Note that you are setting serializer_class not to a class, but to an instance of the class. You either need to set dropfields as an attribute on the class, (just like it does for fields in the documented example you link to) or you need to look at overriding the get_serializer method of the viewset (docs).

Comments

[ePascoal]

I understand that serializer_class is not a class but I can't understand this answer since that the links seems to be outdated. Can you update the links? or give an example attending to the question posted?