Raise IntegrityError if it's not about the slug

localized_fields/models.py

@@ -56,7 +56,9 @@ class LocalizedModel(models.Model):
                 # field class... we can also not only catch exceptions
                 # that apply to slug fields... so yea.. this is as
                 # retarded as it gets... i am sorry :(
-                if 'slug' in str(ex):
+                if 'slug' not in str(ex):
+                    raise ex
+
                 if self.retries >= max_retries:
                     raise ex