Here is my stack of the same problem.
File "C:\work\twist.2\server\backend\lib\images\image_helper.py", line
18, in
get_serving_url
return images.get_serving_url(image_blob_key)
File "C:\Program Files
(x86)\Google\google_appengine\google\appengine\api\imag
es\__init__.py", line 1793, in get_serving_url
return rpc.get_result()
File "C:\Program Files
(x86)\Google\google_appengine\google\appengine\api\apip
roxy_stub_map.py", line 604, in get_result
return self.__get_result_hook(self)
File "C:\Program Files
(x86)\Google\google_appengine\google\appengine\api\imag
es\__init__.py", line 1889, in get_serving_url_hook
rpc.check_success()
File "C:\Program Files
(x86)\Google\google_appengine\google\appengine\api\apip
roxy_stub_map.py", line 570, in check_success
self.__rpc.CheckSuccess()
File "C:\Program Files
(x86)\Google\google_appengine\google\appengine\api\apip
roxy_rpc.py", line 156, in _WaitImpl
self.request, self.response)
File "C:\Program Files
(x86)\Google\google_appengine\google\appengine\api\apip
roxy_stub.py", line 160, in MakeSyncCall
method(request, response)
File "C:\Program Files
(x86)\Google\google_appengine\google\appengine\api\imag
es\images_stub.py", line 296, in _Dynamic_GetUrlBase
datastore.Put(entity_info)
File "C:\Program Files
(x86)\Google\google_appengine\google\appengine\api\data
store.py", line 579, in Put
return PutAsync(entities, **kwargs).get_result()
File "C:\Program Files
(x86)\Google\google_appengine\google\appengine\api\data
store.py", line 556, in PutAsync
return _GetConnection().async_put(config, entities, local_extra_hook)
File "C:\Program Files
(x86)\Google\google_appengine\google\appengine\datastor
e\datastore_rpc.py", line 1534, in async_put
pbs = [self.__adapter.entity_to_pb(entity) for entity in entities]
File "C:\work\twist.2\server\backend\lib\external\ndb\model.py", line
561, in
entity_to_pb
pb = ent._to_pb()
AttributeError: 'Entity' object has no attribute '_to_pb'
i have ran into the same type of problem before. the problem is the sdk
tries to cache the datastore_rpc connection. see _GetConnection in
datastore.py
def _GetConnection():
"""Retrieve a datastore connection local to the thread."""
connection = None
if os.getenv(_ENV_KEY):
try:
connection = _thread_local.connection
except AttributeError:
pass
if connection is None:
connection = datastore_rpc.Connection(adapter=_adapter)
_SetConnection(connection)
return connection
an incorrect datastore connection is being used for that call from this
connection cache.
you can hack around it by adding this before the get_serving_url call.
import os
from google.appengine.api import datastore
os.environ[datastore._ENV_KEY] = ''
os.putenv(datastore._ENV_KEY, '')
datastore._thread_local.connection = None
On Tuesday, August 21, 2012 6:59:25 PM UTC-7, Takashi Matsuo (Google) wrote:
>
>
> Can you show me the whole stacktrace?
> What is your app-id?
>
>
> On Wed, Aug 22, 2012 at 7:14 AM, Richard Arrano
>
> > wrote:
>
>> Hello,
>> I have a function that takes a user image upload and saves both the blob
>> key and a serving URL. After upgrading to 1.7.1, I now get an error trying
>> to save the updated entity to the datastore. The property pictures is an
>> ndb.StringProperty(repeated=True, indexed=False) and the property
>> picture_keys is an ndb.BlobKeyProperty(repeated=True) where the former will
>> hold the image serving URLs for the blob keys in the latter. In a
>> transaction, I read the uploaded file and generate a serving URL and save
>> the blob key and the serving URL. This worked last night before upgrading
>> to 1.7.1, but now I get an error on:
>>
>>
>> article.pictures.append(get_serving_url(blob_info.key()))
>>
>>
>>
>> AttributeError: 'Entity' object has no attribute '_to_pb'
>>
>> Without fail on the development server, this line now generates that
>> error. Was there a change to the API and I should be doing something
>> differently? If so, what?
>>
>> Thanks,
>> Richard
>>
>> --
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>
>
>
> --
> Takashi Matsuo | Developers Advocate | tma...@google.com
>
>
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