I think you're thinking of .load() .get() does not throw on not found.....
On 12/27/07, braydon fuller <[EMAIL PROTECTED]> wrote: > > > you can also use 'try' to avoid error messages: > > def ensure_object(db, id): > try: > o = db.Query(ModelObject).get(id) > except: > o = ModelObject(1, u'title') > db.save(o) > db.commit() > return o > > -Braydon > > > Rick Morrison wrote: > > > > ...if you're just checking to see if something exists in the database, > > why not just try to .load() it, and then construct it afresh if you > > don't find it? > > > > This kind of operation is sometimes called an "upsert" ...some > > database engines support it, some don't. Most don't. But what all > > database engines DO support is a query, followed by either an insert, > > or an update as appropriate. > > > > Here's the idiom that should work: > > > > def ensure_object(sess, id): > > o = sess.Query(ModelObject).get(id) # if found, o is now loaded > > into session > > if not o: > > o = ModelObject(1, u'title' > > sess.save(o) > > sess.flush() > > return o > > > > > > > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
