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<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\ar;
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/**
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* ActiveRelationInterface defines the common interface to be implemented by active record relation classes.
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*
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* A class implementing this interface should also use [[ActiveRelationTrait]].
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @author Carsten Brandt <mail@cebe.cc>
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* @since 2.0
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*/
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interface ActiveRelationInterface extends ActiveQueryInterface
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{
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/**
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* Specifies the relation associated with the pivot table.
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* @param string $relationName the relation name. This refers to a relation declared in [[primaryModel]].
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* @param callable $callable a PHP callback for customizing the relation associated with the pivot table.
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* Its signature should be `function($query)`, where `$query` is the query to be customized.
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* @return static the relation object itself.
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*/
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public function via($relationName, $callable = null);
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}
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