Restframework的

Restframework对view进行了多层封装，封装层数越多，越不灵活
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• View （最底层的view）

#底层view
from django.views.generic.base import View

from goods.models import Goods

class GodsListView(View):
   def get(self,request):
       """
       t通过django的view实现商品列表页
       :param request:
       :return:
       """
       json_list = []
       goods = Goods.objects.all()[:10]
       # for good in goods:
       #     json_dict = {}
       #     json_dict["name"] = good.name
       #     json_dict["category"] = good.category.name
       #     json_dict["market_price"] = good.market_price
       #     json_list.append(json_dict)


       # from django.forms.models import model_to_dict
       # for good in goods:
       #     json_dict = model_to_dict(good)
       #     json_list.append(json_dict)
       #
       from django.http import HttpResponse,JsonResponse
       import json
       from django.core import serializers
       json_data = serializers.serialize("json",goods)
       json_data = json.loads(json_data)
       return JsonResponse(json_data,safe=False)

• APIView （继承底层view，进行封装，一般用的较多）

from rest_framework.views import APIView
from rest_framework.response import Response

class GoodsListView(APIView):
   """
   商品列表
   """
   def get(self,request,format=None):
       goods = Goods.objects.all()[:10]
       goods_serializer = GoodsSerializer(goods,many=True)
       return Response(goods_serializer.data)

   def post(self,request,format=None):
       serilizer = GoodsSerializer(data=request.data)
       if serilizer.is_valid():
           serilizer.save()
           return Response(serilizer.data,status=status.HTTP_201_CREATED)
       return Response(serilizer.errors,status=status.HTTP_400_BAD_REQUEST)

• mixins、generics封装简化代码

from rest_framework import mixins
from rest_framework import generics

class GoodsListView(mixins.ListModelMixin,generics.GenericAPIView):
    """
    商品列表页
    """
    queryset = Goods.objects.all()
    serializer_class = GoodsSerializer

    def get(self,request,*args,**kwargs):
        return self.list(request,*args,**kwargs)

• ListAPIView 将上面的方法再次封装，使代码更加简洁

     class ListAPIView(mixins.ListModelMixin,GenericAPIView)

from rest_framework import generics

class GoodsListView(generics.ListAPIView):
    """
    商品列表页
    """
    queryset = Goods.objects.all()
    serializer_class = GoodsSerializer