路由

    第一类：原始继承APIView

        # http://127.0.0.1:8000/api/v1/auth/

        url(r'^auth/$', views.AuthView.as_view()),

        # http://127.0.0.1:8000/api/v1/auth.json # 想要让页面显示json格式

        url(r'^auth\.(?P<format>[a-z0-9]+)$', views.AuthView.as_view()),

        # http://127.0.0.1:8000/api/v1/auth/1/

        url(r'^auth/(?P<pk>\d+)/$', views.AuthView.as_view()),

        # http://127.0.0.1:8000/api/v1/auth/1.json

        url(r'^auth/(?P<pk>\d+)\.(?P<format>[a-z0-9]+)$', views.AuthView.as_view()),

        class AuthView(views.APIView):

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

                return Response('...')

    第二类： 继承ModelViewSet

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

        url(r'^index/\.(?P<format>[a-z0-9]+)$', views.IndexView.as_view({'get':'list','post':'create'})),

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

        url(r'^index/(?P<pk>\d+)\.(?P<format>[a-z0-9]+)$', views.IndexView.as_view({'get':'retrieve','delete':'destroy','put':'update','patch':'partial_update'})),

        class IndexView(viewsets.ModelViewSet):

            queryset = models.UserInfo.objects.all()

            serializer_class = IndexSerializer

            pagination_class = P2

    第三类：自动帮咱们生成四种url，index/$，index/(?P<pk>\d+)$，index/\.(?P<format>[a-z0-9]+)$,index/(?P<pk>\d+)\.(?P<format>[a-z0-9]+)$

        from rest_framework.routers import DefaultRouter   

        router = DefaultRouter()

        router.register('index',views.IndexViewSet)

        urlpatterns = [

            url(r'^', include(router.urls)),

        ]

        class IndexViewSet(viewsets.ModelViewSet):

            queryset = models.UserInfo.objects.all()

            serializer_class = IndexSerializer

            pagination_class = P2

        class IndexSerializer(serializers.ModelSerializer):

            class Meta:

                model = models.UserInfo

                fields = "__all__"