goods.views_base.py

from django.views.generic.base import View
# from django.views.generic import ListView

from goods.models import Goods

class GoodsListView(View):
    def get(self, request):
        """
        通过django的view实现商品列表页
        :param request:
        :return:
        """
        json_list = []
        goods = Goods.objects.all()[:10]

        # 方式一: 手动一个个赋值给dict
        # import json
        # from django.http import HttpResponse
        # 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
        #     # 这里的add_time是datetime.datetime()对象,json并不支持对其序列化, 此外也不支持ImageField
        #     json_list.append(json_dict)
        # return HttpResponse(json.dumps(json_list), content_type="application/json")

        # 方式二: 使用model_to_dict一次性返回对象的key和value字典, 同样,json不支持对image和datetime的序列化
        # import json
        # from django.http import HttpResponse
        # from django.forms.models import model_to_dict
        # for good in goods:
        #     good_dict=model_to_dict(good)
        #     json_list.append(good_dict)
        # return HttpResponse(json.dumps(json_list), content_type="application/json")

        # 方式三: 使用django自带的serializers序列化工具
        # serialize(format, queryset, **options) 可直接对多个对象进行操作,
        import json
        from django.core import serializers
        from django.http import HttpResponse, JsonResponse
        json_data = serializers.serialize("json",goods)  # 此时的json_data就是一个json格式的列表,每一个元素都是一个对象封装成的一个dict,可见一行代码就达到了目的
        json_data = json.loads(json_data)
        return JsonResponse(json_data,safe=False)  # safe默认为true,即默认只能序列化dict格式的,但现在我们需要序列化list格式的