How do I set different Serializer for list and detail view with Django Rest Framework?

I've adapted an answer from "Django rest framework, use different serializers in the same ModelViewSet" that serves me very well, and I hope you'll find useful:

class MyModelViewSet(viewsets.MyModelViewSet):

    queryset = MyModel.objects.all()
    serializer_class = MyModelListSerializer
    detail_serializer_class = MyModelDetailSerializer

    def get_serializer_class(self):
        if self.action == 'retrieve':
            if hasattr(self, 'detail_serializer_class'):
                return self.detail_serializer_class

        return super(MyModelViewSet, self).get_serializer_class()

In this case, you're just specifying your two serializers and using the one depending on the action. However, this can be made more general (for all actions) as follows:

class MyModelViewSet(viewsets.MyModelViewSet):

    queryset = MyModel.objects.all()
    serializer_class = MyModelSerializer

    action_serializers = {
        'retrieve': MyModelDetailSerializer,
        'list': MyModelListSerializer,
        'create': MyModelCreateSerializer
    }

    def get_serializer_class(self):

        if hasattr(self, 'action_serializers'):
            return self.action_serializers.get(self.action, self.serializer_class)

        return super(MyModelViewSet, self).get_serializer_class()