If you want to apply unique ID, you will need to use it as the __key__ of the entities. Do the checking (get_by_key) in a transaction or use Model.get_or_insert() to achieve what you want to do.
-- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
