I'm have the 'type' column in the press_routing_press linking table; something like this:
Sess.query(Press, PressRoutingPress.type).join(Press.routes).filter(PressRouting.code=='A' ).all() I've tried some variations of this, but no luck. I've also tried applying what the documentation says about using the Association Object, but haven't figured it out yet. I've gotten back lots of data, just not the limited set I'm looking fore. Thanks, Doug From: sqlalchemy@googlegroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Michael Bayer Sent: Friday, September 26, 2008 4:10 PM To: sqlalchemy@googlegroups.com Subject: [sqlalchemy] Re: How to perform inner joins sess.query(Press, PressRouting.code).join(Press.routes).filter(PressRouting.code=='A').all () will return tuples in the form: (some Press object, "somecode") On Sep 26, 2008, at 3:25 PM, Doug Farrell wrote: Michael, You're right of course, your version works fine. I cut and pasted what you have into my code framework, cleaned up some stuff and it works there as well. One thing I cleaned up was this: # initialize the mysql engine and SqlAlchemy base objects engine = create_engine(__config__.database.workflow_url, echo=True) metadata = MetaData(engine) Rather than what you did, which was to create the metatdata = MetaData() first and then bind it to the engine after the mapping with this: metadata.create_all(engine). I don't know if that made the difference or not. To impose on your further, how can I get the 'type' field that is defined as a column in the press_routing_press linking table that goes with everyting that comes back with PressRouting.code=='A' ? Again, thanks for your help and patience, I've been using Python for awhile, but I'm a DB novice... Doug From: sqlalchemy@googlegroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Michael Bayer Sent: Friday, September 26, 2008 3:07 PM To: sqlalchemy@googlegroups.com Subject: [sqlalchemy] Re: How to perform inner joins Doug - what happened with the example I pasted ? It generates the exact SQL you describe. A full script is attached, using the mappings you've sent. It uses sqlite, so you can just run it. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
