Based on a patch from tdterry. Thanks. git-svn-id: http://code.djangoproject.com/svn/django/trunk@7797 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