Yii2 Bootstrap 3
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<?php
/**
* ExistValidator class file.
*
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\validators;
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;
/**
* @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;
/**
* 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 => $value));
if (!$query->exists()) {
$message = ($this->message !== null) ? $this->message : \Yii::t('yii|{attribute} "{value}" is invalid.');
$this->addError($object, $attribute, $message);
}
}
}