drf ---- Page

PageNumberPagination

1, the configuration

• REST_FRAMEWORK = {
      "PAGE_SIZE": 2,
      "DEFAULT_PAGINATION_CLASS": 'rest_framework.paginate.PageArticleSerializer',
  }

2，url

• 
  from django.conf.urls import url
  from django.contrib import admin
  from API import views
  urlpatterns = [
      url(r'^admin/', admin.site.urls),
      url(r'^new/article/$', views.NewArticleView.as_view(),),
      url(r'^new/article/(?P<pk>\d+)/$', views.NewArticleView.as_view(),),
      url(r'^page/article/$', views.PageArticleView.as_view(), ),
  
  ]
  

3, field processing

• from rest_framework.pagination import PageNumberPagination
  class PageArticleSerializer(serializers.ModelSerializer):
    class Meta:
          model = models.Article
          fields = "__all__"

4 views

• class PageArticleView(APIView):
      def get(self, request, *args, **kwargs):
          queryset = models.Article.objects.all()
  
          # 方式一 仅数据
          """
          # 调用分页对象.paginate_queryset方法进行分页，得到的结果是分页之            后的数据
          page_obj = PageNumberPagination()
          # result就是分页玩的一部分数据
          result = page_obj.paginate_queryset(queryset, request, self)
          # 序列化分页之后的数据
          ser = serializer.PageArticleSerializer(instance=result, many=True)
          return Response(ser.data)
          """
  
          # 方式二 数据+分页信息
          """
          page_obj = PageNumberPagination()
          result = page_obj.paginate_queryset(queryset, request, self)
          ser = serializer.PageArticleSerializer(instance=result, many=True)
          return page_obj.get_paginated_response(ser.data)
          """
  
          # 方式三 数据加部分分页信息，Response({可定制})
          page_obj = PageNumberPagination()
          result = page_obj.paginate_queryset(queryset, request, self)
          ser = serializer.PageArticleSerializer(instance=result, many=True)
          return Response({
              "count": page_obj.page.paginator.count,
              "result": ser.data
          })
  

LimitOffsetPagination

• from rest_framework.pagination import PageNumberPagination
  from rest_framework.pagination import LimitOffsetPagination
  from rest_framework import serializers
  
  
  class PageArticleSerializer(serializers.ModelSerializer):
      class Meta:
          model = models.Article
  
  
  fields = "__all__"
  
  
  class HulaLimitOffsetPagination(LimitOffsetPagination):
      max_limit = 2
  
  
  class PageArticleView(APIView):
      def get(self, request, *args, **kwargs):
          queryset = models.Article.objects.all()
          page_object = HulaLimitOffsetPagination()
          result = page_object.paginate_queryset(queryset, request, self)
          ser = PageArticleSerializer(instance=result, many=True)
          return Response(ser.data)