Another wrinkle to this is that if I already have relationship data within the ORM, but then add records outside of the ORM with the expression language, I can't figure out how to reconcile this efficiently.
As a specific example, if I add the snippet below to my original example, you can see the ORM falls out of sync. #Add some new emails to Joe outside the ORM... initial_mail_count = len(joe.addresses) new_mail_count = 2 new_emails = ["newjoe%...@example.com" % i for i in range(new_mail_count)] emailValues = [dict(FK_user_id = joe.id, email = addr) for addr in new_emails] sess.execute(Address.__table__.insert(), emailValues) #Joe's new emails are not in joe.addresses... # - because the ORM has zero awareness of the direct execute call assert len(joe.addresses) == initial_mail_count #I can get them by expiring all of Joe... # - is there a way to do this without expiring Joe? # - Can the relation be expired directly? # - Better would be to to inform the ORM of new data (instead of expiring old # data), but I'm looking for workarounds. sess.expire(joe) assert len(joe.addresses) == (initial_mail_count + new_mail_count) As per the code and comments, I can bring it back into sync by expiring the top level object, but this is clearly not very efficient since it results in a whole query for the top level object, as well as any additional eager loads that have been configured for that object. Can a relation be expired directly? I'm searching hard for how to do this and failing. I'm also still very interested in whether there is some other efficient way to re-sync the ORM with transactions performed outside of it. I have updated the pastebin sample code to include the above snippet as well: http://pastebin.com/eCDSm0YW Russ -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To view this discussion on the web visit https://groups.google.com/d/msg/sqlalchemy/-/rX5kPq4zwjEJ. 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.
