From 377f78fa55988a92674bd940130ff8d15f3ec521 Mon Sep 17 00:00:00 2001
From: Senhua Huang <senhuang@cisco.com>
Date: Thu, 14 Mar 2013 19:05:38 -0700
Subject: [PATCH] Adds delete-orphan to database deletion.

Change-Id: I3570c812c042365e68eef3b5463899afa85eb9fd
Fixes: bug #1096549
---
 quantum/db/models_v2.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/quantum/db/models_v2.py b/quantum/db/models_v2.py
index 6fa0f84d8..4d5a838b8 100644
--- a/quantum/db/models_v2.py
+++ b/quantum/db/models_v2.py
@@ -145,10 +145,10 @@ class Subnet(model_base.BASEV2, HasId, HasTenant):
     enable_dhcp = sa.Column(sa.Boolean())
     dns_nameservers = orm.relationship(DNSNameServer,
                                        backref='subnet',
-                                       cascade='delete')
+                                       cascade='all, delete, delete-orphan')
     routes = orm.relationship(SubnetRoute,
                               backref='subnet',
-                              cascade='delete')
+                              cascade='all, delete, delete-orphan')
     shared = sa.Column(sa.Boolean)
 
 
-- 
2.45.2