Рандомная фильтрация списка группы пользователей icms2

$profiles = $model->limit($limit)->getUsers();

$users = $model->getUsers();
$profiles = array();
while (count($profiles) < $limit) {
	$profiles[] = $users[rand(0,count($users))];
}

$users = $model->getUsers();
$profiles = array_rand($users, $limit);

$users = $model->getUsers();
$profiles = shuffle($users);
$profiles = array_splice($profiles, $limit);

$model->filterGroups($groups);

$model->order_by = "RAND()";

SELECT * FROM table ORDER BY RAND()

SELECT id FROM table (WHERE)*? ORDER BY RAND()

SELECT * FROM table ORDER BY RAND()