GAE端点错误：预期的FooBar实例，得到FooBar（）

本文介绍了GAE端点错误：预期的FooBar实例，得到FooBar（）的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 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.