Django: Using custom primary key, should I specifiy unique=True?

Question

I read this page: http://www.djangoproject.com/documentation/models/custom_pk/, and the example doesn't list unique=True. I'm wondering if there is a compelling reason for them to leave it out, or if there is some reason I should include it. My assumption is that specifying primary_key=True does this automatically though. Any thoughts?

Answer 1

http://docs.djangoproject.com/en/1.1/ref/models/fields/#primary-key

Your assumption is correct, primary_key=True implies unique=True.