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 on the dev environment.
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()
When updating the user, I have the following error from time to time
Expected UserFacebookData instance,
got UserFacebookData(facebook_id=u'xxx', facebook_token=xxx'))
Yet, traces (to print and check type of the ufd / UserFacebookData
instance) show that it's correctly created and that the user also exists
# print user.username
my_username
# print ufd
UserFacebookData(facebook_id=u'xx', facebook_token=xx')
# print type(ufd)
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 experienced 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')
NB: Thread also posted on SO
-
http://stackoverflow.com/questions/24869911/gae-endpoints-error-expected-foobar-instance-got-foobar
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