Have a look at this doc: https://docs.djangoproject.com/en/1.3/ref/models/instances/#how-django-knows-to-update-vs-insert
Basically, it says, that given you're not going to assign primary key prior to saving your object to DB, you may rely on PK field's value, e.g. if it's None - it's new model, otherwise it's existing object. -- You received this message because you are subscribed to the Google Groups "Django users" group. To view this discussion on the web visit https://groups.google.com/d/msg/django-users/-/f_0CdQ5C0cEJ. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
