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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\validators;
use Yii;
use yii\base\InvalidConfigException;
/**
* ExistValidator validates that the attribute value exists in a table.
*
* This validator is often used to verify that a foreign key contains a value
* that can be found in the foreign table.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class ExistValidator extends Validator
{
/**
* @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 yii\db\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.
* @see className
*/
public $attributeName;
/**
* @inheritdoc
*/
public function init()
{
parent::init();
if ($this->message === null) {
$this->message = Yii::t('yii', '{attribute} is invalid.');
}
}
/**
* @inheritdoc
*/
public function validateAttribute($object, $attribute)
{
$value = $object->$attribute;
if (is_array($value)) {
$this->addError($object, $attribute, $this->message);
return;
}
/** @var \yii\db\ActiveRecord $className */
$className = $this->className === null ? get_class($object) : $this->className;
$attributeName = $this->attributeName === null ? $attribute : $this->attributeName;
$query = $className::find();
$query->where([$attributeName => $value]);
if (!$query->exists()) {
$this->addError($object, $attribute, $this->message);
}
}
/**
* @inheritdoc
*/
protected function validateValue($value)
{
if (is_array($value)) {
return [$this->message, []];
}
if ($this->className === null) {
throw new InvalidConfigException('The "className" property must be set.');
}
if ($this->attributeName === null) {
throw new InvalidConfigException('The "attributeName" property must be set.');
}
/** @var \yii\db\ActiveRecord $className */
$className = $this->className;
$query = $className::find();
$query->where([$this->attributeName => $value]);
return $query->exists() ? null : [$this->message, []];
}
}