You must be right. Of course, Turbogears2 already add an extension to the session, and it looks like it is not a list of extension anyway (or maybe in the latest trunk?). What the best way then? To subclass the tg2 extension with mine and continue to call overloaded method from mine? Anything better?
On Aug 29, 3:57 am, Michael Bayer <[EMAIL PROTECTED]> wrote: > On Aug 28, 2008, at 6:57 PM, GustaV wrote: > > > > > Hi all. > > I'm currently working on a map (like in geography :) ) > > > When a new tile in inserted in the DB, I'm using an extension mapper > > to update some neighbor's properties (like the neighbors count). The > > after_insert method helps a lot... but: > > When I modify another object than the one being inserted in the > > after_insert method, the modification happens in the python object, > > but doesn't occur is the DB. The commit at the end does not seem to > > have an effect. > > > What should I do? > > modifications to objects inside of flush() aren't going to propigate > the same way as when they're outside of the flush(). Within > MapperExtension you should generally just do things with the > connection (i.e., issue SQL directly). > > Otherwise, we have SessionExtension which has a before_flush() hook, > and you can poke around inside the Session and change things freely > before anything flush()-related occurs. The catch there is that you'd > probably want to be using the latest 0.5 trunk for that (post beta3) > since we've fixed it up a bit to work in a more useful way. I find > that using before_flush() and after_flush() is generally a better way > to go for dependent changes/SQL to be issued since you aren't doing > things inside of the flush() itself, where its hard to predict when > things will actually happen. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
