如果组用户的名称要与已创建的组创建匹配项,如何更新同一个组?如果我想更新而不是显示错误,我应该在哪里工作?是验证函数还是创建函数
这是我的序列化程序
class DeviceGroupSerializer(serializers.ModelSerializer):
id = serializers.UUIDField(source='token', format='hex', read_only=True)
devices = DeviceIdSerializer(many=True)
class Meta:
model = DeviceGroup
fields = ['id','name', 'devices',]
def validate(self, data):
errors = {}
try:
name = data['name']
if not bool(name):
#empty or null
errors['name'] = 'Name cannot be empty'
except KeyError:
if not (self.instance and bool(self.instance.name)):
errors['name'] = 'Name is required'
if len(data.get('devices', [])) == 0:
errors['devices'] = 'Device(s) should be specified.'
if bool(errors):
raise serializers.ValidationError(errors)
return data
def create(self, validated_data):
# for create - there is always name; we have already checked that in validation
# TODO Further check for group-name clash - if yes, update the same group
owner = validated_data['owner']
name = validated_data['name']
group = DeviceGroup.objects.create(owner=owner, name=name)
tokens = [d['token'] for d in validated_data['devices'] ]
BaseDevice.objects.filter(token__in=tokens, owner=owner).update(group=group)
return group
def update(self, instance, validated_data):
# for update - there may or may not be name
# if it does, it refers rename
owner = validated_data['owner']
name = validated_data.get('name', None)
if not name is None:
instance.update(name=name)
tokens = [d['token'] for d in validated_data['devices'] ]
BaseDevice.objects.filter(token__in=tokens, owner=owner).update(group=instance)
return instance
你想要^{} :
根据您共享的内容,如果已经存在具有给定
name
的DeviceGroup
所有者,则这看起来类似于以下内容:相关问题 更多 >
编程相关推荐