Problem turns out to have been with my ISAPI WSGI interface, it looks like it has a broken thread local model. More details here if anyone is interested:
http://groups.google.com/group/sqlalchemy/browse_thread/thread/fbca1399020f6a2e On Nov 6, 5:19 pm, Randy Syring <[EMAIL PROTECTED]> wrote: > Thank you for taking the time to respond, I really appreciate it! > > On Nov 6, 2:46 pm, Michael Bayer <[EMAIL PROTECTED]> wrote: > > > you should definitely create the engine and metadata on a per-process > > basis. When using SQLite, the engine automatically chooses the > > "SingletonThreadPool" connection pool, which will maintain a single > > SQLite connection per application thread, which is never moved across > > threads (unless you did so explicitly). > > Ah, well there is something I have overlooked. I have been forgetting > that there is a connection object since I never use it directly. I > was actually thinking that the engine was the connection, but I see > now that is not accurate. But would I need to close the connection > explicitly after each request? > > > The error you're getting > > would only occur if you are sharing the connection returned by the > > engine across threads, which can also occur if you're using a single > > Session that's bound to a connection across threads. When using the > > scoped_session() manager, this also should not occur - some > > description of this lifecycle is > > athttp://www.sqlalchemy.org/docs/05/session.html#unitofwork_contextual_... > > . > > I do not believe that I am sharing the connection object across > threads, at least not deliberately. The only sqlalchemy objects I am > working with are an engine (which is stored at the process level), the > metadata (which is unbound and stored at the process level), and a > scoped session. At the end of each request, I call remove() on the > scoped session class, which I assumed was enough. Would there be > anything else I should do at the end of a request in order to "clean > up"? > > Also, I am using Elixir. Is it possible that Elixir is holding on to > a connection object I don't know about? It uses scoped sessions by > default as well. > > Thanks! --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
