Django REST Framework 3.7 generics CreateAPIView DestroyAPIView GenericAPIView ListAPIView ListCreateAPIView RetrieveAPIView RetrieveDestroyAPIView RetrieveUpdateAPIView RetrieveUpdateDestroyAPIView UpdateAPIView mixins CreateModelMixin DestroyModelMixin ListModelMixin RetrieveModelMixin UpdateModelMixin pagination BasePagination CursorPagination LimitOffsetPagination PageNumberPagination serializers BaseSerializer HyperlinkedModelSerializer ListSerializer ModelSerializer Serializer views APIView viewsets GenericViewSet ModelViewSet ReadOnlyModelViewSet ViewSet ViewSetMixin