Django Rest Framework:创建对象后禁用字段更新
试图通过Django Rest Framework API调用使我的用户模型成为RESTful,以便我可以创建用户并更新其个人资料。
但是,当我与用户一起执行特定的验证过程时,我不希望用户在创建帐户后能够更新用户名。我尝试使用read_only_fields,但这似乎在POST操作中禁用了该字段,因此在创建用户对象时无法指定用户名。
我该如何实施呢?目前存在的API的相关代码如下。
class UserSerializer(serializers.HyperlinkedModelSerializer): class Meta:
model = User
fields = ('url', 'username', 'password', 'email')
write_only_fields = ('password',)
def restore_object(self, attrs, instance=None):
user = super(UserSerializer, self).restore_object(attrs, instance)
user.set_password(attrs['password'])
return user
class UserViewSet(viewsets.ModelViewSet):
"""
API endpoint that allows users to be viewed or edited.
"""
serializer_class = UserSerializer
model = User
def get_permissions(self):
if self.request.method == 'DELETE':
return [IsAdminUser()]
elif self.request.method == 'POST':
return [AllowAny()]
else:
return [IsStaffOrTargetUser()]
谢谢!
回答:
似乎你需要用于POST和PUT方法的不同序列化器。在用于PUT的序列化器方法中,你仅可以除去用户名字段(或将用户名字段设置为只读)。
class UserViewSet(viewsets.ModelViewSet): """
API endpoint that allows users to be viewed or edited.
"""
serializer_class = UserSerializer
model = User
def get_serializer_class(self):
serializer_class = self.serializer_class
if self.request.method == 'PUT':
serializer_class = SerializerWithoutUsernameField
return serializer_class
def get_permissions(self):
if self.request.method == 'DELETE':
return [IsAdminUser()]
elif self.request.method == 'POST':
return [AllowAny()]
else:
return [IsStaffOrTargetUser()]
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