On Feb 26, 2009, at 10:27 AM, Wichert Akkerman wrote:
> > Previously Michael Bayer wrote: >> On Feb 26, 2009, at 8:21 AM, Wichert Akkerman wrote: >>> What happens if you do not call expunge on it, but pickle the object >>> in a >>> cache, load it later and then merge it? >> >> the state of the newly unpickled object, that is the current value of >> its mapped attributes, would be merged with the persistent version in >> the session. merge() will load the object from the database into an >> in-session, persistent instance before merging the external state. >> because your unpickled instance never actually enters the session, >> conflicts with its previous session or an already present in-session >> object are nicely avoided. > > I actually skip that and invalidate the cache entry on changes to > prevent that SQL hit. What I meant was: does it matter if you never > explicitly call expunge? for pickling ? not at all. --~--~---------~--~----~------------~-------~--~----~ 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 sqlalchemy+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---