You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
94 lines
3.0 KiB
94 lines
3.0 KiB
<?php |
|
/** |
|
* UniqueValidator class file. |
|
* |
|
* @link http://www.yiiframework.com/ |
|
* @copyright Copyright © 2008 Yii Software LLC |
|
* @license http://www.yiiframework.com/license/ |
|
*/ |
|
|
|
namespace yii\validators; |
|
use yii\base\InvalidConfigException; |
|
|
|
/** |
|
* CUniqueValidator validates that the attribute value is unique in the corresponding database table. |
|
* |
|
* @author Qiang Xue <qiang.xue@gmail.com> |
|
* @since 2.0 |
|
*/ |
|
class UniqueValidator extends Validator |
|
{ |
|
/** |
|
* @var boolean whether the attribute value can be null or empty. Defaults to true, |
|
* meaning that if the attribute is empty, it is considered valid. |
|
*/ |
|
public $allowEmpty = true; |
|
/** |
|
* @var string the ActiveRecord class name or alias of the class |
|
* that should be used to look for the attribute value being validated. |
|
* Defaults to null, meaning using the ActiveRecord class of the attribute being validated. |
|
* @see attributeName |
|
*/ |
|
public $className; |
|
/** |
|
* @var string the ActiveRecord class attribute name that should be |
|
* used to look for the attribute value being validated. Defaults to null, |
|
* meaning using the name of the attribute being validated. |
|
*/ |
|
public $attributeName; |
|
|
|
/** |
|
* Validates the attribute of the object. |
|
* If there is any error, the error message is added to the object. |
|
* @param \yii\db\ActiveRecord $object the object being validated |
|
* @param string $attribute the attribute being validated |
|
* @throws InvalidConfigException if table doesn't have column specified |
|
*/ |
|
public function validateAttribute($object, $attribute) |
|
{ |
|
$value = $object->$attribute; |
|
if ($this->allowEmpty && $this->isEmpty($value)) { |
|
return; |
|
} |
|
|
|
/** @var $className \yii\db\ActiveRecord */ |
|
$className = $this->className === null ? get_class($object) : \Yii::import($this->className); |
|
$attributeName = $this->attributeName === null ? $attribute : $this->attributeName; |
|
|
|
$table = $className::getTableSchema(); |
|
if (($column = $table->getColumn($attributeName)) === null) { |
|
throw new InvalidConfigException('Table "' . $table->name . '" does not have a column named "' . $attributeName . '"'); |
|
} |
|
|
|
$query = $className::find(); |
|
$query->where(array($column->name => $value)); |
|
|
|
if ($object->getIsNewRecord()) { |
|
// if current $object isn't in the database yet then it's OK just |
|
// to call exists() |
|
$exists = $query->exists(); |
|
} else { |
|
// if current $object is in the database already we can't use exists() |
|
$query->limit(2); |
|
$objects = $query->all(); |
|
|
|
$n = count($objects); |
|
if ($n === 1) { |
|
if ($column->isPrimaryKey) { |
|
// primary key is modified and not unique |
|
$exists = $object->getOldPrimaryKey() != $object->getPrimaryKey(); |
|
} else { |
|
// non-primary key, need to exclude the current record based on PK |
|
$exists = array_shift($objects)->getPrimaryKey() != $object->getOldPrimaryKey(); |
|
} |
|
} else { |
|
$exists = $n > 1; |
|
} |
|
} |
|
|
|
if ($exists) { |
|
$message = $this->message !== null ? $this->message : \Yii::t('yii', '{attribute} "{value}" has already been taken.'); |
|
$this->addError($object, $attribute, $message); |
|
} |
|
} |
|
} |