drf 视图类、视图集、路由-526互联

一、视图类

1、写 publish: 查询所有，查询单条，修改一条，新增一条，删除一条的接口

class PublishView(ListCreateAPIView):
    queryset = Publish.objects.all()
    serializer_class = PublishSerializer

class PublishDetailView(RetrieveUpdateDestroyAPIView):
    queryset = Publish.objects.all()
    serializer_class = PublishSerializer

2、写 publish 查询单条，新增一条的接口--->使用9个视图子类编写

class PublishView(CreateAPIView):
    queryset = Publish.objects.all()
    serializer_class = PublishSerializer

class PublishDetailView(RetrieveAPIView):
    queryset = Publish.objects.all()
    serializer_class = PublishSerializer

3、写 publish: 查询单条，新增一条，的接口--->使用5个视图扩展类+GenericAPIView

class PublishView(GenericAPIView,CreateModelMixin):
    queryset = Publish.objects.all()
    serializer_class = PublishSerializer
    def post(self,request,*args,**kwargs):
        return self.create(request,*args,**kwargs)

class PublishDetailView(GenericAPIView,RetrieveModelMixin):
    queryset = Publish.objects.all()
    serializer_class = PublishSerializer
    def get(self,request,*args,**kwargs):
        return self.retrieve(request,*args,**kwargs)

二、视图集

1、ModelViewSet

只要视图类继承了它，路由写法改一下，5个接口都有了

from rest_framework.viewsets import ModelViewSet

class PublishView(ModelViewSet):
    queryset = Publish.objects.all()
    serializer_class = PublishSerializer

class PublishDetailView(ModelViewSet):
    queryset = Publish.objects.all()
    serializer_class = PublishSerializer

2、修改路由

在路由.as_view()中：写一个字典，请求方法对应接口增删改查方法

urlpatterns = [
    path('publishs/', PublishView.as_view({'get': 'list', 'post': 'create'})),  
    path('publishs/<int:pk>', PublishDetailView.as_view({'get': 'retrieve', 'put': 'update', 'delete': 'destroy'})),
]

3、ModelViewSet源码分析