From b58940e9b5580a57310eceef6181e3d7273d2752 Mon Sep 17 00:00:00 2001
From: ovidiupruteanu <ovidiu@softped.com>
Date: Mon, 9 Sep 2013 16:33:54 +0300
Subject: [PATCH] Fixed handling null values in Sqlserver->value

The value function quoted a null value as N'' instead of NULL.
As a result is produced queries like [name] IS N'' instead of [name] IS NULL which resulted in an SQL error.
---
 lib/Cake/Model/Datasource/Database/Sqlserver.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Cake/Model/Datasource/Database/Sqlserver.php b/lib/Cake/Model/Datasource/Database/Sqlserver.php
index 788885dbc..7fb0225ad 100644
--- a/lib/Cake/Model/Datasource/Database/Sqlserver.php
+++ b/lib/Cake/Model/Datasource/Database/Sqlserver.php
@@ -571,7 +571,7 @@ class Sqlserver extends DboSource {
  * @return string Quoted and escaped data
  */
 	public function value($data, $column = null) {
-		if (is_array($data) || is_object($data)) {
+		if ($data === null || is_array($data) || is_object($data)) {
 			return parent::value($data, $column);
 		} elseif (in_array($data, array('{$__cakeID__$}', '{$__cakeForeignKey__$}'), true)) {
 			return $data;