I have a certain ORM model that is being referenced from several other models. I don't want the user to be able to delete rows from that table that are still being referenced elsewhere.
Ideally I would like something like: refs = get_references(row) if refs: print "Can't delete row because of:" for ref in refs: print ref else: self.session.delete(row) Or even just: if is_being_referenced(row): print "You can't delete that!" else: self.session.delete(row) If there's no way to do either of those, then I would settle for: try: self.session.delete(row) except sql.exc.DeletionError: print "You can't delete that!" #Again, a way to get a list of the offending references would be nice! I tried doing the above, catching IntegrityError, but the problem is that SQLA doesn't 'notice' the error and tell me about it until another action occurs that causes other queries to be run. Is there some way I can make SQLA check the integrity of the database immediately after the deletion? Preferably without running unnecessary queries if that's going to cause a performance hit. Cheers, Cam Cameron Jackson Engineering Intern Air Operations Thales Australia Thales Australia Centre, WTC Northbank Wharf, Concourse Level, Siddeley Street, Melbourne, VIC 3005, Australia Tel: +61 3 8630 4591 cameron.jack...@thalesgroup.com.au<mailto:cameron.jack...@thalesgroup.com.au> | www.thalesgroup.com.au<http://www.thalesgroup.com.au> ------------------------------------------------------------------------- DISCLAIMER: This e-mail transmission and any documents, files and previous e-mail messages attached to it are private and confidential. They may contain proprietary or copyright material or information that is subject to legal professional privilege. They are for the use of the intended recipient only. Any unauthorised viewing, use, disclosure, copying, alteration, storage or distribution of, or reliance on, this message is strictly prohibited. No part may be reproduced, adapted or transmitted without the written permission of the owner. If you have received this transmission in error, or are not an authorised recipient, please immediately notify the sender by return email, delete this message and all copies from your e-mail system, and destroy any printed copies. Receipt by anyone other than the intended recipient should not be deemed a waiver of any privilege or protection. Thales Australia does not warrant or represent that this e-mail or any documents, files and previous e-mail messages attached are error or virus free. ------------------------------------------------------------------------- -- 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.