这是使用Doctrine2的WHERE IN表达式处理有序数组的正确方法吗？

$dql = \"SELECT b FROM BlogPost WHERE b.id IN (\" . implode(\', \', $ids) . \")\";
$query = $em->createQuery($dql);
...

$ex = $em->getExpressionBuilder();
$dql = \'SELECT b FROM BlogPost b WHERE \' . $ex->in(\'b.id\', $ids));
$query = $em->createQuery($dql);

function cmp($a, $b) {
    global $ids;
    return (array_search($a->getId(), $ids) < array_search($b->getId(), $ids)) ? -1 : 1;
}
usort($res, \'cmp\');

$query = $this->_em->createQuery(\'SELECT b FROM BlogPost WHERE b.id IN (?1)\');
$query->setParameter(1, implode(\',\', $ids));