On Fri, 2007-07-06 at 21:50 +0000, Nathan Ostgard wrote: > You would either have to duplicate the Title foreign key in the Copy > model or write a custom check in the save method. > > To enforce uniqueness over several columns you would use the > "unique_together" field of the Meta class for your Copy model. (see: > http://www.djangoproject.com/documentation/model-api/#unique-together) > This creates the appropriate unique index for your table. However, > this means you can only enforce uniqueness for fields within an > individual model. > Thanks. That's what I was afraid of, but the idea of duplicating the title ForeignKey never occurred to me.
On the other hand, I guess that would require overriding __setattr__ method to set the title whenever the purchase_group is set, so it might just be easier to put the constraint in the save method. Todd --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
