From 0ee27d5b62a76781f5d78fc3f506dca624941062 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?V=C3=AD=C3=B0ir=20Valberg=20Gu=C3=B0mundsson?= Date: Thu, 29 May 2014 01:00:30 +0200 Subject: [PATCH] [1.7.x] Fixed #22720 -- Migrations attempt to create _order twice. Backport of 6cfa2fae39 from master --- django/db/models/options.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/django/db/models/options.py b/django/db/models/options.py index d204bcf84c..c49567d795 100644 --- a/django/db/models/options.py +++ b/django/db/models/options.py @@ -179,7 +179,8 @@ class Options(object): if self.order_with_respect_to: self.order_with_respect_to = self.get_field(self.order_with_respect_to) self.ordering = ('_order',) - model.add_to_class('_order', OrderWrt()) + if not any(isinstance(field, OrderWrt) for field in model._meta.local_fields): + model.add_to_class('_order', OrderWrt()) else: self.order_with_respect_to = None