From f1ce0e165db03db42f243ac9a3e22f2bc3910e6a Mon Sep 17 00:00:00 2001
From: Qiang Xue <qiang.xue@gmail.com>
Date: Mon, 27 May 2013 13:43:48 -0400
Subject: [PATCH] Fixes issue #428 Allowing UniqueValidator to be used with
 non-AR models.

---
 framework/yii/validators/UniqueValidator.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/framework/yii/validators/UniqueValidator.php b/framework/yii/validators/UniqueValidator.php
index a4d8bff..b650693 100644
--- a/framework/yii/validators/UniqueValidator.php
+++ b/framework/yii/validators/UniqueValidator.php
@@ -9,6 +9,7 @@ namespace yii\validators;
 
 use Yii;
 use yii\base\InvalidConfigException;
+use yii\db\ActiveRecord;
 
 /**
  * CUniqueValidator validates that the attribute value is unique in the corresponding database table.
@@ -71,7 +72,7 @@ class UniqueValidator extends Validator
 		$query = $className::find();
 		$query->where(array($column->name => $value));
 
-		if ($object->getIsNewRecord()) {
+		if (!$object instanceof ActiveRecord || $object->getIsNewRecord()) {
 			// if current $object isn't in the database yet then it's OK just to call exists()
 			$exists = $query->exists();
 		} else {