五个拓展类

1. CreateModelMixin:保存数据
2. UpdateModelMixin:更新数据
3. DestoryModelMixin：删除数据
4. RetrieveModelMixin：获取单一数据
5. ListModelMixin：获取多个数据
   代码优化：

from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework.generics import GenericAPIView
from rest_framework.mixins import CreateModelMixin, UpdateModelMixin, DestroyModelMixin, RetrieveModelMixin, ListModelMixin
from .models import BookInfo, HeroInfo
from book.serializers import BookSerializer, HeroSerializer


class BooksView(GenericAPIView, CreateModelMixin, ListModelMixin):
    serializer_class = BookSerializer  # 指定序列化器
    queryset = BookInfo.objects.all()  # 指定数据对象查询集

    def get(self, request):
        """
        获取所有图书
        :param request:
        :return:
        """
        return self.list(request)

    def post(self, request):
        """
        保存图书
        :param request:
        :return:
        """
        return self.create(request)


class BookView(GenericAPIView, RetrieveModelMixin, UpdateModelMixin, DestroyModelMixin):
    serializer_class = BookSerializer  # 指定序列化器
    queryset = BookInfo.objects.all()  # 指定数据对象查询集

    def get(self, request, pk):
        """
        获取单一图书
        :param request:
        :param pk: 查询图书的id
        :return:
        """
        return self.retrieve(request, pk)

    def put(self, request, pk):
        """
        更新单一图书
        :param request:
        :param pk:
        :return:
        """
        # 1. 获取前端数据
        return self.update(request, pk)

    def delete(self, request, pk):
        """
        删除单一图书
        :param request:
        :param pk:
        :return:
        """
        return self.delete(request, pk)

调用过程

• 前端请求 --> 自己定义的类视图 --> 拓展类方法 --> GenericAPIView中的方法
• drf_demo
  
  DRF框架伪代码实现1.png

几个可用子类视图

1. CreateAPIView
   提供 post 方法
   继承自： GenericAPIView、CreateModelMixin

2. ListAPIView
   提供 get 方法
   继承自：GenericAPIView、ListModelMixin

3. RetireveAPIView
   提供 get 方法
   继承自: GenericAPIView、RetrieveModelMixin

4. DestoryAPIView
   提供 delete 方法
   继承自：GenericAPIView、DestoryModelMixin

5. UpdateAPIView
   提供 put 和 patch 方法
   继承自：GenericAPIView、UpdateModelMixin

6. RetrieveUpdateAPIView
   提供 get、put、patch方法
   继承自： GenericAPIView、RetrieveModelMixin、UpdateModelMixin

7. RetrieveUpdateDestoryAPIView
   提供 get、put、patch、delete方法
   继承自：GenericAPIView、RetrieveModelMixin、UpdateModelMixin、DestoryModelMixin