DRF-类视图（GenericAPIView）

from rest_framework.views import APIView
from meituan.models import Merchant
from django.http import Http404
from .serializers import MerchantSerializer
from rest_framework.response import Response
from rest_framework import status
from rest_framework import generics

class MerchantView(
    generics.CreateAPIView,
    generics.UpdateAPIView,
    generics.DestroyAPIView,
    generics.RetrieveAPIView
):
    queryset = Merchant.objects.all()
    serializer_class = MerchantSerializer
    # lookup_field = 'name'

class MerthantListView(
    generics.ListAPIView
):
    queryset = Merchant.objects.all()
    serializer_class = MerchantSerializer

• get_queryset(self):
  • 通过重写该方法实现复杂查询后返回queryset对象。return queryset
• get_object(self):
  • 通过复写该方法实现数据检索时，返回一条数据
• perform_creat(self,serializer):
  • 保存时调用的方法
• perform_update(self,serializer):
  • 更新对象时调用
• perform_destroy(self,serializer):
  • 删除对象的时候调用