On Feb 6, 2008, at 12:20 PM, Rick Morrison wrote:
> Is a session required for any form of object state tracking, or is > it all done on the mapped objects? > > What I'd like to do is to load a graph of related objects, and keep > them around for a number of change requests. It's a web app, so the > session will be going away between requests. > > There's going to be a parent object and a tree of child objects. > Processing requests will entail all three types of state change on > the objects, adding new items to mapped collections, removing > objects from mapped collections, and modifying the parent objects > and various child objects. > > Between requests, what I'd like to do is either just cache the > parent object or pickle it to temp storage, modifying it on request. > There will be a final "checkout" op that will commit all the changes > in one shot. > > So (finally), the question: Can I just save the pickled object > itself, or do I need to somehow keep a session along with it? I'm > pretty sure that add + updates are tracked on the objects, but I'm > not sure about deletes..... state tracking is all inside of instance._state and is completely independent of Session. it also entirely pickles/unpickles along with the instance. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
