diff options
Diffstat (limited to 'django')
| -rw-r--r-- | django/db/models/base.py | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/django/db/models/base.py b/django/db/models/base.py index 1dbf0e52e2..149b0e5a42 100644 --- a/django/db/models/base.py +++ b/django/db/models/base.py @@ -592,7 +592,7 @@ class Model(six.with_metaclass(ModelBase)): rel_instance = getattr(self, field.get_cache_name()) local_val = getattr(db_instance, field.attname) related_val = None if rel_instance is None else getattr(rel_instance, field.target_field.attname) - if local_val != related_val: + if local_val != related_val or (local_val is None and related_val is None): del self.__dict__[field.get_cache_name()] self._state.db = db_instance._state.db |