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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\db;
/**
* ActiveRelationInterface defines the common interface to be implemented by active record relation classes.
*
* A class implementing this interface should also use [[ActiveRelationTrait]].
*
* @author Qiang Xue < qiang.xue @ gmail . com >
* @author Carsten Brandt < mail @ cebe . cc >
* @since 2.0
*/
interface ActiveRelationInterface extends ActiveQueryInterface
{
/**
* Specifies the relation associated with the pivot table.
* @param string $relationName the relation name. This refers to a relation declared in the [[ActiveRelationTrait::primaryModel|primaryModel]] of the relation.
* @param callable $callable a PHP callback for customizing the relation associated with the pivot table.
* Its signature should be `function($query)`, where `$query` is the query to be customized.
* @return static the relation object itself.
*/
public function via($relationName, $callable = null);
}