diff options
| -rw-r--r-- | django/db/models/fields/related.py | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py index fb38aa9c57..1b79e5bade 100644 --- a/django/db/models/fields/related.py +++ b/django/db/models/fields/related.py @@ -228,8 +228,7 @@ class SingleRelatedObjectDescriptor(six.with_metaclass(RenameRelatedObjectDescri value._state.db = router.db_for_write(value.__class__, instance=instance) elif value._state.db is not None and instance._state.db is not None: if not router.allow_relation(value, instance): - raise ValueError('Cannot assign "%r": instance is on database "%s", value is on database "%s"' % - (value, instance._state.db, value._state.db)) + raise ValueError('Cannot assign "%r": the current database router prevents this relation.' % value) related_pk = tuple([getattr(instance, field.attname) for field in self.related.field.foreign_related_fields]) if None in related_pk: @@ -328,8 +327,7 @@ class ReverseSingleRelatedObjectDescriptor(six.with_metaclass(RenameRelatedObjec value._state.db = router.db_for_write(value.__class__, instance=instance) elif value._state.db is not None and instance._state.db is not None: if not router.allow_relation(value, instance): - raise ValueError('Cannot assign "%r": instance is on database "%s", value is on database "%s"' % - (value, instance._state.db, value._state.db)) + raise ValueError('Cannot assign "%r": the current database router prevents this relation.' % value) # If we're setting the value of a OneToOneField to None, we need to clear # out the cache on any old related object. Otherwise, deleting the |