【Vue+DRF生鲜电商】05.商品列表序列化普通方法

## 普通视图序列化 ### JSONView 访问 https://github.com/gildas-lormeau/JSONView-for-Chrome 下载 选择插件目录 JSONView-for-Chrome-master\WebContent  ### View实现商品列表-json 在goods应用下创建 views_base.py 文件，增加一下内容 ```python 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获取商品列表页 :param request: :return: """ json_list = list() all_goods = Goods.objects.all()[:5] print(all_goods) for goods in all_goods: json_dict = dict() json_dict['name'] = goods.name json_dict['category'] = goods.category.name json_dict['shop_price'] = goods.shop_price json_list.append(json_dict) from django.http import HttpResponse import json return HttpResponse(json.dumps(json_list), content_type='application/json') ``` 修改项目配置文件夹的主 urls.py ，增加该视图的url ```python from goods.views_base import GoodsListView urlpatterns = [ path('admin/', admin.site.urls), path('api-auth/', include('rest_framework.urls')), path('ckeditor/', include('ckeditor_uploader.urls')), # 配置富文本编辑器url path('goods/', GoodsListView.as_view(), name='goods_list') ] ``` 访问 http://127.0.0.1:8000/goods/  但这种方式需要将每个字段加到json中去，如果遇到`DateTimeField`字段，是不能序列化的。 ### View实现商品列表-model_to_dict 解决字段多的情况，在我们的模型中，如果字段多，像上面的方法，是非常麻烦的。 ```python 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获取商品列表页 :param request: :return: """ json_list = list() all_goods = Goods.objects.all()[:5] # print(all_goods) # for goods in all_goods: # json_dict = dict() # json_dict['name'] = goods.name # json_dict['category'] = goods.category.name # json_dict['shop_price'] = goods.shop_price # json_list.append(json_dict) from django.forms.models import model_to_dict for goods in all_goods: json_dict = model_to_dict(instance=goods) json_list.append(json_dict) from django.http import HttpResponse import json return HttpResponse(json.dumps(json_list), content_type='application/json') ``` 以上方式虽然能获取所有字段，但对于`ImageField`和`DateTimeField`仍然是不支持的 ### 实现商品列表-serializers ```python class GoodsListView(View): def get(self, request): """ 通过Django的View获取商品列表页 :param request: :return: """ json_list = list() all_goods = Goods.objects.all()[:5] # print(all_goods) # for goods in all_goods: # json_dict = dict() # json_dict['name'] = goods.name # json_dict['category'] = goods.category.name # json_dict['shop_price'] = goods.shop_price # json_list.append(json_dict) # from django.forms.models import model_to_dict # for goods in all_goods: # json_dict = model_to_dict(instance=goods) # json_list.append(json_dict) from django.core import serializers json_data = serializers.serialize('json', all_goods) from django.http import HttpResponse, JsonResponse import json return HttpResponse(json_data, content_type='application/json') ```  再使用`JsonResponse` ```python class GoodsListView(View): def get(self, request): """ 通过Django的View获取商品列表页 :param request: :return: """ json_list = list() all_goods = Goods.objects.all()[:5] # print(all_goods) # for goods in all_goods: # json_dict = dict() # json_dict['name'] = goods.name # json_dict['category'] = goods.category.name # json_dict['shop_price'] = goods.shop_price # json_list.append(json_dict) # from django.forms.models import model_to_dict # for goods in all_goods: # json_dict = model_to_dict(instance=goods) # json_list.append(json_dict) from django.core import serializers json_data = serializers.serialize('json', all_goods) # 序列化 from django.http import HttpResponse, JsonResponse import json # return HttpResponse(json_data, content_type='application/json') json_data = json.loads(json_data) # 转换为数组 return JsonResponse(json_data) ``` 会出现错误：`TypeError: In order to allow non-dict objects to be serialized set the safe parameter to False.` 可以进行如下配置 ```python return JsonResponse(json_data) # 修改为 return JsonResponse(json_data, safe=False) ``` 同样也可以正常显示json数据 ### 使用serializer缺点  - 比如图片，这保存的是一个相对路径，必须手动在前面加上 settings.py 中配置的`media` - 字段，序列化顺序固定 - 没有文档功能

明人不说暗话 领红包就是支持！！！ 来都来了，再到页面底部看下呗~ ↓ ↓ ↓

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