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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\elasticsearch;
use yii\db\ActiveRelationInterface;
use yii\db\ActiveRelationTrait;
/**
* ActiveRelation represents a relation between two Active Record classes.
*
* ActiveRelation instances are usually created by calling [[ActiveRecord::hasOne()]] and
* [[ActiveRecord::hasMany()]]. An Active Record class declares a relation by defining
* a getter method which calls one of the above methods and returns the created ActiveRelation object.
*
* A relation is specified by [[link]] which represents the association between columns
* of different tables; and the multiplicity of the relation is indicated by [[multiple]].
*
* If a relation involves a pivot table, it may be specified by [[via()]] method.
*
* @author Carsten Brandt <mail@cebe.cc>
* @since 2.0
*/
class ActiveRelation extends ActiveQuery implements ActiveRelationInterface
{
use ActiveRelationTrait;
/**
* Creates a DB command that can be used to execute this query.
* @param Connection $db the DB connection used to create the DB command.
* If null, the DB connection returned by [[modelClass]] will be used.
* @return Command the created DB command instance.
*/
public function createCommand($db = null)
{
if ($this->primaryModel !== null) {
// lazy loading
if (is_array($this->via)) {
// via relation
/** @var ActiveRelation $viaQuery */
list($viaName, $viaQuery) = $this->via;
if ($viaQuery->multiple) {
$viaModels = $viaQuery->all();
$this->primaryModel->populateRelation($viaName, $viaModels);
} else {
$model = $viaQuery->one();
$this->primaryModel->populateRelation($viaName, $model);
$viaModels = $model === null ? [] : [$model];
}
$this->filterByModels($viaModels);
} else {
$this->filterByModels([$this->primaryModel]);
}
}
return parent::createCommand($db);
}
}