From 87d6d9349313ce60de0d79810ebd737e5b750a23 Mon Sep 17 00:00:00 2001
From: Abijah <Abijah@97e9348a-65ac-dc4b-aefc-98561f571b83>
Date: Mon, 3 Mar 2014 07:22:06 +0000
Subject: [PATCH] Fixed bug causing crash if locks in use exceeds the number of
 locks that are supposed to exist

git-svn-id: file:///svn-source/pmgr/branches/v0.3_work@1043 97e9348a-65ac-dc4b-aefc-98561f571b83
---
 site/controllers/locks_controller.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/site/controllers/locks_controller.php b/site/controllers/locks_controller.php
index 81115be..c42420b 100644
--- a/site/controllers/locks_controller.php
+++ b/site/controllers/locks_controller.php
@@ -55,7 +55,7 @@ class LocksController extends AppController {
   function gridDataFields(&$params, &$model) {
     $fields = parent::gridDataFields($params, $model);
     $fields[] = 'COUNT(LocksUnit.id) AS inuse';
-    $fields[] = 'Lock.qty - COUNT(LocksUnit.id) AS avail';
+    $fields[] = 'IF(Lock.qty > COUNT(LocksUnit.id), Lock.qty - COUNT(LocksUnit.id), 0) AS avail';
     return $fields;
   }