loading/saving interactions with the databases into django.db.backend. This
helps external db backend writers and removes a bunch of database-specific
if-tests in django.db.models.fields.
Great work from Leo Soto.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@8131 bcc190cf-cafb-0310-a4f2-bffc1f526a37
(via a callable). Also updates the documentation of the "default" attribute to
indicate a callable can be used. Thanks, Philipe Raoult.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@7331 bcc190cf-cafb-0310-a4f2-bffc1f526a37
Changed raise to conform to PEP 3109 and wrapped the long line.
Added beginnings of tests for model fields.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@5778 bcc190cf-cafb-0310-a4f2-bffc1f526a37
