Adding DRF to Polls Tutorial to get my arms around DRF but getting AttributeError at /api/questions/3/

[trexmo]

I did a startapp api and populated serializers.py, urls.py and views.py

I have two other models in other apps for Instructions and Parameters

@api_view(('GET',))
def api_root(request, format=None):
    return Response({
        'instructions': reverse('instructions', request=request, format=format),
        'parameters': reverse('parameters', request=request, format=format),
        'questions' : reverse('questions', request=request, format=format),
        })

And the Web page is working

HTTP 200 OK
Allow: GET, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "instructions": "http://localhost:8000/api/instructions/",
    "parameters": "http://localhost:8000/api/parameters/",
    "questions": "http://localhost:8000/api/questions/"
}

Instructions and Parameters works great with List, detail, create and even Patch.

questions also worked great on the single Question model.

The problem came with I tried to join the Question and Choice models together.

Here are the Serializers involved.

class QuestionChoiceSerializerWithVotes(QuestionChoiceSerializer):

    class Meta(QuestionChoiceSerializer.Meta):
        fields = QuestionChoiceSerializer.Meta.fields + ('votes',)


class QuestionListPageSerializer(serializers.ModelSerializer):

    # was_published_recently = serializers.BooleanField(read_only=True)

    class Meta:
        model = Question
        # fields = '__all__'
        fields = ('id', 'question_text')

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

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


class QuestionResultPageSerializer(QuestionListPageSerializer):
    choices = QuestionChoiceSerializerWithVotes(many=True, read_only=True)

class VoteSerializer(serializers.Serializer):
    choice_id = serializers.IntegerField()

Now when I hit /api/questions/

I get

HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

[
    {
        "id": 5,
        "question_text": "Description"
    },
    {
        "id": 1,
        "question_text": "Relationships"
    }
]

and no options for POST or PUT.

When I try the pk http://localhost:8000/api/questions/1/

I get this error.

AttributeError at /api/questions/1/
Got AttributeError when attempting to get a value for field `matchingKey` on serializer `ParameterSerializer`.
The serializer field might be named incorrectly and not match any attribute or key on the `Question` instance.
Original exception text was: 'Question' object has no attribute 'matchingKey'.

I don't see it. 'matchingKey' is a field in Parameter model but I don't see it being referenced in Question but it is in ParameterSerializer. PUZZLED.