Django和DRF的View层获取JSON的方式

调用方法

都是导入urls.py的urlpatterns里配置使用：

path(r'goods/', GoodsListView.as_view(), name="goods-list"),

Django方式

创建一个views_base.py，里面：

# encoding: utf-8
from goods.models import Goods

# Django cpv方式最底层的view
from django.views.generic.base import View


class GoodsListView(View):
    def get(self, request):
        """
        通过django的view实现商品列表页
        """
        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_dict["add_time"] = good.add_time
        #     json_list.append(json_dict)

        # from django.http import HttpResponse
        # import json
        # return HttpResponse(json.dumps(json_list),content_type="application/json")

        from django.forms.models import model_to_dict
        for good in goods:
            json_dict = model_to_dict(good)
            json_list.append(json_dict)

        import json
        from django.core import serializers
        json_data = serializers.serialize('json', goods)
        json_data = json.loads(json_data)
        from django.http import HttpResponse, JsonResponse
        # jsonResponse做的工作也就是加上了dumps和content_type
        # return HttpResponse(json.dumps(json_data), content_type="application/json")
        # 注释掉loads，下面语句正常
        # return HttpResponse(json_data, content_type="application/json")
        # 返回的不为dict时要设置safe=False
        return JsonResponse(json_data, safe=False)

DRF方式

自定义model的序列化器，在serializers.py：

from rest_framework import serializers


class GoodsSerializer(serializers.Serializer):
    def update(self, instance, validated_data):
        pass

    def create(self, validated_data):
        pass

    name = serializers.CharField(required=True, max_length=100)
    click_num = serializers.IntegerField(default=0)

在views.py：

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

from .serializers import GoodsSerializer
from .models import Goods


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

其中DRF方式更强大，在浏览器请求下会直接返回一个易读的HTML而不是JSON。可以用Postman再试试。