2008/9/11 Chris Stromberger <[EMAIL PROTECTED]>: > Curious about using "unique" in a column definition of a model for a legacy > db. My assumption is that "unique" only comes into play during db creation, > to create the index on the field, and thereafter uniqueness is enforced by > the db? Or does unique in a model affect creation of new model objects or > anything else? > > Just wondering bcs I made a few columns unique on the db after the initial > model creation. Is it important to go back and add unique to the Django > model in this case?
You can read in the documentation of the unique field option[1]: "This is enforced at the database level and at the Django admin-form level. If you try to save a model with a duplicate value in a unique field, a django.db.IntegrityError will be raised by the model's save() method." About a legacy db where you put a unique constraint manually it is recommended to put the option unique to the field so you get a nice error in the Django forms instead of an error screen. Regards. [1] http://docs.djangoproject.com/en/dev/ref/models/fields/#unique -- Marcelo Ramos --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
