day100-序列化组件

3 序列化组件

class BookSerializer(serializers.Serializer):

    title = serializers.CharField( max_length=32)
    price =serializers.DecimalField(max_digits=5,decimal_places=2)

    # 一对多字段
    publish_email=serializers.CharField(max_length=32,source="publish.email")
    publish_name=serializers.CharField(max_length=32,source="publish.name")

    # 多对多字段
    # authors=serializers.CharField(max_length=32,source="authors.all")
    authors=serializers.SerializerMethodField()
    def get_authors(self,obj):
        ret=[]
        for i in obj.authors.all():
            ret.append({"name":i.name,"age":i.name})
        return ret

'''

serializer=BookSerializer(book_list,many=True)
serializer.data:

temp=[]
for obj in book_list:
    temp.append({
             "title":obj.title,
             "price":obj.price,
             "publish":obj.publish.email,
         if 字段SerializerMethodField：
             "authors":get_authors(obj)
    })

json.dumps(temp)

'''

class BookSerializer(serializers.ModelSerializer):
    class Meta:
        model=Book
        # fields=["title","price"]
        fields="__all__"

class BookView(APIView):

    def get(self,request):
        book_list=Book.objects.all()
        serializer=BookSerializer(book_list,many=True)

        return Response(serializer.data)

    def post(self,request):

        print(request.data)

        serializer=BookSerializer(data=request.data,many=False)

        if serializer.is_valid():
            serializer.save() # create操作

            return Response(serializer.data) # 序列化提交数据
        else:
            return Response(serializer.errors) # 序列化错误信息

今日内容：

    1 序列化组件

       序列化：    queryset------>[{},{},{}]
                   obj     ------>{}

    2 视图组

            class AuthorsView(ModelViewSet):
                    queryset = Author.objects.all()
                    serializer_class = AuthorSerializer

            #url(r'^authors/$', views.AuthorsView.as_view({"get":"list","post":"create"})),
            #url(r'^authors/$', ViewSetMixin.as_view({"get":"list","post":"create"})),
            #url(r'^authors/$', ViewSetMixin.view),
            一旦用户访问,get访问authors/：
            ViewSetMixin.view(reqeust):
                         for method, action in actions.items(): # {"get":"list","post":"create"}
                                handler = getattr(self, action) #  handler===self.list
                                setattr(self, method, handler)  #  self.get=self.list

                         return self.dispatch(request, *args, **kwargs)
                         #
                         APIView.dispatch(request):

                                                  handler = getattr(self, request.method.lower()) # self.list
                                                  response = handler(request, *args, **kwargs)
                                                  #     def list(self.request):
           `                                      #            return .....

                                                  return response

            ###################

            #url(r'^authors/(?P<pk>\d+)/', views.AuthorsView.as_view({"get":"retrieve","delete":"destroy","put":"update"})),
            #url(r'^authors/$', ViewSetMixin.as_view({"get":"retrieve","delete":"destroy","put":"update"})),
            #url(r'^authors/$', ViewSetMixin.view),
            一旦用户访问,get访问authors/1：
            ViewSetMixin.view(reqeust):
                         for method, action in actions.items(): # {"get":"retrieve","delete":"destroy","put":"update"}
                                handler = getattr(self, action) #  handler===self.retrieve    handler=== destroy    handler===update
                                setattr(self, method, handler)  #  self.get=self.retrieve    self.delete=self.destroy   self.put=self.update

                         return self.dispatch(request, *args, **kwargs)
                         #
                         APIView.dispatch(request):

                                                  handler = getattr(self, request.method.lower()) # self.retrieve
                                                  response = handler(request, *args, **kwargs)
                                                  #     def retrieve(self.request):
           `                                      #            return .....

                                                  return response