On Dec 28, 2007 1:00 AM, Rick Morrison <[EMAIL PROTECTED]> wrote: > 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
This is not what I need: in your example object is not updated with new data. Let me describe the problem. There is a data, that must exist in DB. I have a setup script that gets such data from other source as model objects and pushes it to DB. No problems to run this script ones. But a life changes and the new must-have data appear. No problems to run it several times if pushed data can't be changed. Unfortunately they can be changed, so I have to replace it. I can't delete them before inserting since there are foreign key references. Sure, I can get an object from DB and copy data from new one. But there is a lot of object types, so have to invent yet another meta description for it (while it already exists in sqlalchemy). And requirements changes often, so I have to change scheme in 2 places. This is not good and error prone. Why I have to invent new description when there is already one from sqlalchemy mapping? Can't I use it for my purpose? Something like merge(objFromDB, newObj) will solve the problem. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
