The field 'choice_set' was declared on serializer QuestionDetailPageSerializer, but has not been included in the 'fields' option.

[michaeloliveraz]

Adding DRF to Polls from the DJango Tutorial. Created 'api' app and populated the views.py, urls.py and serializers.py

That was working fine on just Questions, but now I want to add Questions and Choices to the API.

I added this serializer class.

`class QuestionDetailPageSerializer(QuestionListPageSerializer):
choice_set = QuestionChoiceSerializer(many=True)

def create(self, validated_data):
    choice_validated_data = validated_data.pop('choice_set')
    question = Question.objects.create(**validated_data)
    choice_set_serializer = self.fields['choice_set']
    for each in choice_validated_data:
        each['question'] = question
    choices = choice_set_serializer.create(choice_validated_data)
    return question`

Now /swagger-docs throws this error.

AssertionError: The field 'choice_set' was declared on serializer QuestionDetailPageSerializer, but has not been included in the 'fields' option.

I tried adding , 'choice_set' to fields or Question and Choice serializers to no avail. What am I missing?