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django - 分页 DRF 无法正常工作

问题描述

当我在我的项目中放置默认分页时，我的分页有点问题，某些页面在其他页面中工作，例如：

这是我所有项目的文件 settings.py

    REST_FRAMEWORK = {
            'DEFAULT_PAGINATION_CLASS': 'apicolonybit.notification_clbt.NotificationPagination.PaginationList'}

这是我项目中的配置应用程序：myproject / Configuration

class ConfigurationsList(generics.ListAPIView):
     """
        list configuration with current user authenticated.
      """
      queryset = Configuration.objects.all()
      serializer_class = ConfigurationSerializer

当我在邮递员中运行这部分时，运行良好，但是当我尝试在另一个模块中运行时：

class TransactionListHistory(generics.ListAPIView):
      # queryset = TransactionHistory.objects.all()
      serializer_class = TransactionHistorySerializer
      pagination_class = PaginationList
      page_size = 2
      page = 1

     def get_object(self, current_user):
         # User.objects.get(id=pk)
         return TransactionHistory.objects.filter(agent_id=current_user.id).order_by('-id')

      @classmethod
      def get_object_client(cls, current_user, trans):
            # User.objects.get(id=pk)
          return TransactionHistory.objects.filter(user_id=current_user.id).order_by('-id')

    def get(self, request, format=None):
          current_user = request.user
          status_trans = 6
          agent_user = 2
          client_user = 1
          trans = {
            'status': status_trans
           }
          typeusers = Profile.objects.get(user_id=current_user.id)

        # actions agent user = show all transaction from all client users
         if typeusers.type_user == agent_user:
               list_trans_init = self.get_object(current_user)
               serializer = TransactionHistorySerializer(list_trans_init, many=True)
               get_data = serializer.data

    # actions normal user (client user) = just see transactions from self user
         if typeusers.type_user == client_user:
              list_trans_init = self.get_object_client(current_user, trans)
              serializer = TransactionHistorySerializer(list_trans_init, many=True)
              get_data = serializer.data

         # if not PaginationList.get_next_link(self):
         # return JsonResponse({'data': get_data}, safe=False, status=status.HTTP_200_OK)
         return self.get_paginated_response(get_data)

我的自定义文件分页是这样的

class PaginationList(PageNumberPagination):
      page_size = 2 # when show me an error I added
      offset = 1 # when show me an error I added
      limit = 10 # when show me an error I added
      count = 10 # when show me an error I added
      page = 1 # when show me an error I added

     def get_paginated_response(self, data):
        return Response({
            'links': {
               'next': self.get_next_link(),
               'previous': self.get_previous_link()
             },
            'count': self.page.paginator.count,
            'results': data
          })

变量 page_size 等，然后向我显示一个错误，例如 PaginationList is not object page，我添加了这个 page_size 并传递了其他错误，例如 PaginationList is not object offset 并再次添加了 var。

好吧，最后一个错误告诉我就像这个'int'对象没有属性'has_next'

请帮助我，如何在我的类 TransactionListHistory 中添加我的自定义分页

感谢您的关注。

标签： djangodjango-rest-framework

解决方案

你使用self.get_paginated_response()错误的方式。

from rest_framework.response import Response

class TransactionListHistory(generics.ListAPIView):
    # Your code

    def get(self, request, *args, **kwargs):
        queryset = do_something_and_return_QuerySet()  # do some logical things here and 

        page = self.paginate_queryset(queryset)
        if page is not None:
            serializer = self.get_serializer(page, many=True)
            return self.get_paginated_response(serializer.data)

        serializer = self.get_serializer(queryset, many=True)
        return Response(serializer.data)

这do_something_and_return_QuerySet()是你的功能或逻辑，它返回 a QuerySet。


例子

class TransactionListHistory(generics.ListAPIView):
    # Your code

    def get(self, request, *args, **kwargs):
        queryset = TransactionHistory.objects.filter(user_id=request.user.id)

        page = self.paginate_queryset(queryset)
        if page is not None:
            serializer = self.get_serializer(page, many=True)
            return self.get_paginated_response(serializer.data)

        serializer = self.get_serializer(queryset, many=True)
        return Response(serializer.data)

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