On Mar 27, 2010, at 3:28 PM, Fernando Takai wrote: >> is it possible your object is present in a session that is, in a different >> thread, being expired as this operation runs ? > I don't know, but i can verify that. > If that is happening, what can i do to prevent?
an object associated with a session should only be dealt with in that thread's session. session isn't threadsafe. > > >> Well seems like the project you want to access is just None. SA can't do >> anything with it. I had a similar problem recently, it was… > I'm not trying to access anything, i'm just trying to merge the object > into the session… > > On Sat, Mar 27, 2010 at 3:25 PM, Michael Bayer <mike...@zzzcomputing.com> > wrote: >> >> On Mar 27, 2010, at 12:42 PM, Fernando Takai wrote: >> >>> Hi all! >>> >>> I'm running SQLAlchemy 0.6b2 for a while and i've seem some strange >>> exception (AttributeError: 'NoneType' object has no attribute >>> '_sa_iterator') happening one in a while. >>> This is my stacktrace: >>> >>> Traceback (most recent call last): >>> File "/usr/lib/python2.5/threading.py", line 486, in __bootstrap_inner >>> self.run() >>> File "/usr/lib/python2.5/threading.py", line 446, in run >>> self.__target(*self.__args, **self.__kwargs) >>> File "./db/models/job.py", line 109, in run >>> func(self) >>> File "./queue/queue.py", line 284, in job_finished >>> job = session.merge(job) >>> File >>> "/usr/lib/python2.5/site-packages/SQLAlchemy-0.6beta2-py2.5-linux-x86_64.egg/sqlalchemy/orm/session.py", >>> line 1126, in merge >>> load=load, _recursive=_recursive) >>> File >>> "/usr/lib/python2.5/site-packages/SQLAlchemy-0.6beta2-py2.5-linux-x86_64.egg/sqlalchemy/orm/session.py", >>> line 1188, in _merge >>> prop.merge(self, state, state_dict, merged_state, merged_dict, >>> load, _recursive) >>> File >>> "/usr/lib/python2.5/site-packages/SQLAlchemy-0.6beta2-py2.5-linux-x86_64.egg/sqlalchemy/orm/properties.py", >>> line 681, in merge >>> obj = session._merge(current_state, current_dict, load=load, >>> _recursive=_recursive) >>> File >>> "/usr/lib/python2.5/site-packages/SQLAlchemy-0.6beta2-py2.5-linux-x86_64.egg/sqlalchemy/orm/session.py", >>> line 1188, in _merge >>> prop.merge(self, state, state_dict, merged_state, merged_dict, >>> load, _recursive) >>> File >>> "/usr/lib/python2.5/site-packages/SQLAlchemy-0.6beta2-py2.5-linux-x86_64.egg/sqlalchemy/orm/properties.py", >>> line 661, in merge >>> for current in instances: >>> File >>> "/usr/lib/python2.5/site-packages/SQLAlchemy-0.6beta2-py2.5-linux-x86_64.egg/sqlalchemy/orm/collections.py", >>> line 570, in __iter__ >>> return iter(getattr(self._data(), '_sa_iterator')()) >>> AttributeError: 'NoneType' object has no attribute '_sa_iterator' >> >> is it possible your object is present in a session that is, in a different >> thread, being expired as this operation runs ? >> >> >> >> >> >> >>> >>> I don't have a good test for this, but i'm trying to create one. >>> Does anyone knows why this is happening? >>> >>> Thanks! >>> >>> -- >>> Fernando Takai >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "sqlalchemy" group. >>> To post to this group, send email to sqlalch...@googlegroups.com. >>> To unsubscribe from this group, send email to >>> sqlalchemy+unsubscr...@googlegroups.com. >>> For more options, visit this group at >>> http://groups.google.com/group/sqlalchemy?hl=en. >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sqlalchemy" group. >> To post to this group, send email to sqlalch...@googlegroups.com. >> To unsubscribe from this group, send email to >> sqlalchemy+unsubscr...@googlegroups.com. >> For more options, visit this group at >> http://groups.google.com/group/sqlalchemy?hl=en. >> >> > > > > -- > Fernando Takai > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To post to this group, send email to sqlalch...@googlegroups.com. > To unsubscribe from this group, send email to > sqlalchemy+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/sqlalchemy?hl=en. > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalch...@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
