视图：

    a.过去

        class PagerView(View):

            pass

    b.现在

        class Pager1View(APIView):

            pass

    c.rest_framework  基本没用

    from rest_framework.generics import GenericAPIView

    class V1View(GenericAPIView):

        queryset = models.Role.objects.all()

        serializer_class = PagerSerialiser

        pagination_class = PageNumberPagination

        def get(self, request, *args, **kwargs):

            #获取数据

            roles = self.get_queryset()

            #分页

            pager_roles = self.paginate_queryset(roles)

            #序列化

            ser = self.get_serializer(instance=pager_roles, many=True)

            return Response(ser.data)

    d.GenericViewset(ViewSetMixin, genrics.GenericAPIView):

    urls.py

    url(r'^v1/$',views.V1View.as_view({'get':'list'})),  #可以改变as_view 视图中的函数中的get方法 改成了list方法

    from rest_framework.viewsets import GenericViewSet

    class V1View(GenericViewSet):

        def list(self,request,*args,**kwargs):

            return Response('')

    最方便的视图方法 增删改查局部更新和GenericViewSet

    视图中

    from rest_framework.response import Response

    from api.utils.serializers.pager import PagerSerialiser

    from rest_framework.pagination import PageNumberPagination

    from rest_framework.viewsets import ModelViewSet

    class V1View(ModelViewSet):

    """

    class ModelViewSet(

                   mixins.CreateModelMixin,  #不需要传id

                   mixins.RetrieveModelMixin,

                   mixins.UpdateModelMixin,

                   mixins.DestroyModelMixin,

                   mixins.ListModelMixin,    #不需要传id

                   GenericViewSet):

    """

    queryset = models.Role.objects.all()

    serializer_class = PagerSerialiser

    pagination_class = PageNumberPagination

    urls.py  路由系统

    from django.contrib import admin

    from django.urls import path

    from api import views

    from django.conf.urls import url

    urlpatterns = [

        url(r'^v1/$',views.V1View.as_view({'get':'list','post':'create'})),

        url(r'^v1/(?P<pk>\d+)/$',views.V1View.as_view({'get':'retrieve','delete':'destroy','put':'update','patch':'partial_update'})),

    ]

    utils.serializers.pager.py

    from rest_framework import serializers

    from api import models

    class PagerSerialiser(serializers.ModelSerializer):

        class Meta:

            model = models.Role

            fields = "__all__"