GAE端点错误：预期的FooBar实例，得到FooBar（） [英] GAE Endpoints error: Expected FooBar Instance, got FooBar()

问题描述

我正在使用Google Cloud Endpoints管理API，并且正在努力处理一个奇怪的，随机发生的错误。

我有以下模型：

<$ p $错误发生在生产中，单元测试通过属性。
facebook_id = ndb.StringProperty（required = True，indexed = True）
facebook_token = ndb.StringProperty（required = True，indexed = True）
$ b $ class User（ndb.Model，Entity）：
created = ndb.DateTimeProperty（auto_now_add = True，indexed = True）
username = ndb.StringProperty（indexed = True）
facebook_data = ndb.StructuredProperty（UserFacebookData，indexed = False）

创建用户

  ufd = UserFacebookData（facebook_id = some_api_data，facebook_token = some_api_data）
 user = User（用户名= some_api_data，facebook_data = ufd）
 user.save（）
  

或者更新一个

  ufd = UserFacebookData（facebook_id = some_api_data，facebook_token = some_api_data）
 user = get_from_db（som e_api_data）
 user.facebook_data = ufd 
 user.save（）
  

（编辑：save（）是一个父实体类的方法，做一个put（）+一些memcached的东西）

得到，不时更新用户，以下错误：

 预期的UserFacebookData实例，
获得了UserFacebookData（facebook_id = u'xxx'，facebook_token = xxx' ））
  

然而，痕迹（打印和检查ufd / UserFacebookData实例的类型）正确创建并且用户也存在

 ＃print user.username 
 my_username 
＃print UserFacebookData 
 User FacebookData（facebook_id = u'xx'，facebook_token = xx'）
＃打印类型（UserFacebookData）
 UserFacebookData< facebook_id = StringProperty（'facebook_id'，required = True），
 facebook_token = StringProperty（'facebook_token'，必需= True）> 
  

我看不到我在想什么。有人已经体验过 - 希望能够修复它吗？这里是完整的错误堆栈

pre $ 遇到来自ProtoRPC方法实现的意外错误：BadValueError（预期的UserFacebookData实例，得到UserFacebookData（facebook_id = u' xx'，facebook_token = xx'））
Traceback（最近的最后一次调用）：
文件/base/data/home/runtimes/python27/python27_lib/versions/third_party/protorpc-1.0/protorpc/在protorpc_service_app
response =方法（实例，请求）
文件/base/data/home/runtimes/python27/python27_lib/versions/third_party/endpoints-1.0中的wsgi / service.py /endpoints/api_config.py，第1329行，在invoke_remote
中返回remote_method（service_instance，request）
文件/base/data/home/runtimes/python27/python27_lib/versions/third_party/protorpc-1.0 /protorpc/remote.py，第412行，在invoke_remote_method
响应=方法（service_instance，请求）
文件/base/data/home/apps/s~yapme-web/alpha2.377359917212322950/ api / helpers.py，第43行，方法
返回f unc（* args，** kwargs）
文件/base/data/home/apps/s~xx-web/alpha2.377359917212322950/api/user.py，第25行，位于users_create
user = User.create（request）
创建
用户的文件/base/data/home/apps/s~xx-web/alpha2.377359917212322950/entities/users.py，第168行.facebook_data = facebook_data
文件/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py，第1339行，位于__set__
self ._set_value（实体，值）
文件/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py，行1084，在_set_value $ b中$ b value = self._do_validate（value）
文件/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py，第1031行，在_do_validate
value = self._call_shallow_validation（value）
文件/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py，行1223，在_call_shallow_validation
返回调用（val ue）
文件/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py，行1270，调用
newvalue = method （self，value）
在_validate
中的文件/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py，第2269行（self._modelclass .__ name__，value））
BadValueError：预期的UserFacebookData实例，获得UserFacebookData（facebook_id = u'xx'，facebook_token = xx'）


解决方案

我有同样的问题，并且在这里发布了答案：时发生App Engine BadValueError问题/ 33910240>。基本上这个问题是由相对导入导致的，所以python认为FooBar在不同的包中。

I'm managing an API with using Google Cloud Endpoints and am struggling with a strange, randomly happening, error. The error happens in production only, the unit tests pass property.

I have the following model:

class UserFacebookData(ndb.Model):
  facebook_id = ndb.StringProperty(required=True, indexed=True)
  facebook_token = ndb.StringProperty(required=True, indexed=True)

class User(ndb.Model, Entity): 
  created = ndb.DateTimeProperty(auto_now_add=True, indexed=True)
  username = ndb.StringProperty(indexed=True)
  facebook_data = ndb.StructuredProperty(UserFacebookData, indexed=False)

And using this to create a user

ufd = UserFacebookData(facebook_id=some_api_data, facebook_token=some_api_data)
user = User(username=some_api_data, facebook_data=ufd)
user.save()

or to update one

ufd = UserFacebookData(facebook_id=some_api_data, facebook_token=some_api_data)    
user = get_from_db(some_api_data)
user.facebook_data = ufd
user.save()

(Edit: save() is a method of the parent Entity class, doing a put() + some memcached stuff)

And got, from time to time when updating the user, the following error

Expected UserFacebookData instance, 
got UserFacebookData(facebook_id=u'xxx', facebook_token=xxx'))

Yet, traces (to print and check type of the ufd / UserFacebookData instance) showed that it's correctly created and that the user also exists

# print user.username
my_username
# print UserFacebookData
UserFacebookData(facebook_id=u'xx', facebook_token=xx')
# print type(UserFacebookData)
UserFacebookData<facebook_id=StringProperty('facebook_id', required=True), 
facebook_token=StringProperty('facebook_token', required=True)>

I can't see what I'm missing. Has someone already experiences that - and hopefully fixed it? Here's the full error stack

Encountered unexpected error from ProtoRPC method implementation: BadValueError (Expected UserFacebookData instance, got UserFacebookData(facebook_id=u'xx', facebook_token=xx'))
Traceback (most recent call last):
  File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/protorpc-1.0/protorpc/wsgi/service.py", line 181, in protorpc_service_app
response = method(instance, request)
  File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/endpoints-1.0/endpoints/api_config.py", line 1329, in invoke_remote
return remote_method(service_instance, request)
  File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/protorpc-1.0/protorpc/remote.py", line 412, in invoke_remote_method
response = method(service_instance, request)
  File "/base/data/home/apps/s~yapme-web/alpha2.377359917212322950/api/helpers.py", line 43, in method
return func(*args, **kwargs)
  File "/base/data/home/apps/s~xx-web/alpha2.377359917212322950/api/user.py", line 25, in users_create
user = User.create(request)
  File "/base/data/home/apps/s~xx-web/alpha2.377359917212322950/entities/users.py", line 168, in create
user.facebook_data = facebook_data
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py", line 1339, in __set__
    self._set_value(entity, value)
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py", line 1084, in _set_value
value = self._do_validate(value)
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py", line 1031, in _do_validate
value = self._call_shallow_validation(value)
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py", line 1223, in _call_shallow_validation
return call(value)
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py", line 1270, in call
newvalue = method(self, value)
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py", line 2269, in _validate
(self._modelclass.__name__, value))
BadValueError: Expected UserFacebookData instance, got UserFacebookData(facebook_id=u'xx', facebook_token=xx')

解决方案

I had the same problem, and have posted the answer here: App Engine BadValueError when saving ndb LocalStructured entity. Basically the problem was caused by a relative import, so that python thinks FooBar are in different packages.

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