Django Serializer HiddenField隐藏字段实例
Djangorest_frameworkserializer.HiddenField(default=serializer.CurrentUser())
在用DajngoRestFramework时,有时候需要这么一个场景,前端不需要传一个或多个字段,这些字是直接根据用户登录信息判断自动赋值的,如果用mixin和viewset进行搭配写接口,要么重写create,update等方法,要么就是在serializer_class时就定义默认值,而第二种方法明显简单一些。
具体看代码
#假如我定义了一个serliazer,shop和status都是自动判断后赋值的 #用HiddenField定义字段,default方法来写具体赋值函数 #default方法是一个类,需要重写set_context的方法 fromrest_framework.compatimport( InvalidTimeError,MaxLengthValidator,MaxValueValidator, MinLengthValidator,MinValueValidator,unicode_repr,unicode_to_repr ) classCurrentShopDefault(object): defset_context(self,serializer_field): self.shop=serializer_field.context['request'].user.shop def__call__(self): returnself.shop def__repr__(self): returnunicode_to_repr('%s()'%self.__class__.__name__) classCurrentStatus(object): defset_context(self,serializer_field): user_info=serializer_field.context['request'].user ifuser_info.shop.shop_type=='SHOP_TYPE_COMCIRCLE': self.status=1 else: self.status=2 def__call__(self): returnself.status def__repr__(self): returnunicode_to_repr('%s()'%self.__class__.__name__) #定义serializer classGameSerializer(serializers.ModelSerializer): classMeta: model=Game exclude=['created_time'] shop=serializers.HiddenField( default=CurrentShopDefault() ) status=serializers.HiddenField( default=CurrentStatus() )
最后在view文件的class里直接指定serializer_class就好了
classGameOpView(mixins.CreateModelMixin,mixins.UpdateModelMixin,mixins.RetrieveModelMixin,mixins.DestroyModelMixin,viewsets.GenericViewSet): """ retrieve: 获取-游戏详情 create: 创建-游戏 update: 更新-游戏 delete: 删除-游戏 partial_update: 更新游戏状态 total_info: 游戏数据总览 """ permission_classes=[IsShop,] pagination_class=StandardResultsSetPagination defget_queryset(self): returnGame.objects.filter( Q(shop=self.request.user.shop)|Q(shop__com_circle=self.request.user.shop)) defget_serializer_class(self): ifself.action=='partial_update': returnGameStatusSerializer elifself.action=='retrieve': returnGameReadSerializer else: returnGameSerializer
补充知识:drf中serializers.HiddenField使用方法
classCurrentUser(object): defset_context(self,serializer_field): self.user_obj=serializer_field.context['request'].user def__call__(self): returnself.user_obj classGetObjectFlow(object): defset_context(self,serializer_field): self.object_flow=serializer_field.context['request'].data.get('object_flow')#这里需要在views中传进去呀,djangocontext上下文中才能取到 def__call__(self): returnself.object_flow classAddHolidaySerializer(serializers.ModelSerializer,BaseModelSerializer): user=serializers.HiddenField(default=CurrentUser())#给用户外键赋当前请求的user object_flow=serializers.HiddenField(default=GetObjectFlow())#后端自己处理一些特殊的外键 status=serializers.HiddenField(default=0)#默认新增时给status赋初值 classMeta: model=Holiday exclude=('deleted',)
以上这篇DjangoSerializerHiddenField隐藏字段实例就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持毛票票。