Active Selection should provide origin array with elemnts or ActiveQuery

[nadar]

Sometimes it could be helpfull to have the original selection, therefor it would be better to either all $items as optional array argument or instead of findAll() just a find():

$items = $class::findAll(Yii::$app->request->getBodyParam('ids', [0]));

for bc reasons maybe a property $selectedIds in $activeSelect object.

$object->selecetedIds = $ids;
return $object->handle($items);