How to update in Yii without foreach for all models, the result of a find..() selection?

Question

Yii

Good afternoon,
I have an array of descendant models:

$category=Category::model()->findByPk(1);
$descendants=$category->descendants()->findAll();

How can I update for all $descendants field, for example EXIST to value "0" with one UpdateAll without foreach ?

Answer 1

Don't write find at all then and don't work with the Category model. Work with the model you are going to update.
I can guess something like this:
If you want to update the array of selected ARs and do not want to write foreach to any, then you can use array_walk php.net/manual/en/function.array-walk.php

Answer 2

If I understand correctly, then try this:

$category=Category::model()->findByPk(1);
$descendants=$category->descendants()->findAll();
$ids = array_map(function($descendant) {
    return $descendant->id;
}, $descendants);

Category::model()->addInCondition('id', $ids)->updateAll(array('exist' => 0));