/**
* @param string $subscriber_id
* @return DbMessageQuery $this
*/
public function withSubscriber($subscriber_id = null)
{
if ($subscriber_id === null) {
$modelClass = $this->modelClass;
$t = $modelClass::tableName();
$this->andWhere("{$t}.subscription_id IS NULL");
} else {
$this->innerJoinWith('subscription');
$this->andWhere(DbSubscription::tableName() . '.subscriber_id=:subscriber_id', [':subscriber_id' => $subscriber_id]);
}
return $this;
}
