Fixed #12560. Changed validate_unique to stop checking null primary key values. Thanks, Honza Král.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12227 bcc190cf-cafb-0310-a4f2-bffc1f526a37

1 files changed, 1 insertions, 1 deletions

diff --git a/django/db/models/base.py b/django/db/models/base.py
index 6f90091871..822116054c 100644
--- a/django/db/models/base.py
+++ b/django/db/models/base.py
@@ -715,7 +715,7 @@ class Model(object):
             for field_name in unique_check:
                 f = self._meta.get_field(field_name)
                 lookup_value = getattr(self, f.attname)
-                if f.null and lookup_value is None:
+                if lookup_value is None:
                     # no value, skip the lookup
                     continue
                 if f.primary_key and not getattr(self, '_adding', False):