python - Django Rest Framework - APIView Pagination

Question

I have a very simple APIView, but I don't know how to setup pagination here. In this scenario I select an Event with given pk, then I get all the NewsItems assigned to this Event.

pagination_class = LimitOffsetPagination works OK when I define queryset at the beginning in ListCreateAPIView, for ex. queryset = Event.objects.all() but not with custom get:

class EventNewsItems(APIView):
    pagination_class = LimitOffsetPagination

    def get(self, request, pk, format=None):

        #user = request.user
        event = Event.objects.get(pk=pk)
        news = event.get_news_items().all()

        serializer = NewsItemSerializer(news, many=True, context={'request':request})
        response = Response(serializer.data, status=status.HTTP_200_OK)
        return response

---

Solved:

def get(self, request, pk, format=None):

    #user = request.user
    event = Event.objects.get(pk=pk)
    news = event.get_news_items().all()
    paginator = LimitOffsetPagination()
    result_page = paginator.paginate_queryset(news, request)
    serializer = NewsItemSerializer(result_page, many=True, context={'request':request})
    response = Response(serializer.data, status=status.HTTP_200_OK)
    return response

question from:https://stackoverflow.com/questions/65887418/django-rest-framework-pagenumberpagination-doesnt-work

Answer 1

Another option would be inheriting from the pagination class, with fewer changes on the view class:

class EventNewsItems(APIView, LimitOffsetPagination):

    def get(self, request, pk, format=None):
        event = Event.objects.get(pk=pk)
        news = event.get_news_items().all()

        results = self.paginate_queryset(news, request, view=self)
        serializer = NewsItemSerializer(results, many=True)
        return self.get_paginated_response(serializer.data)