How to create a validated form with dynamic radio button groups?

Question

Yii

I'm interested in a few things.
1) How to dynamically populate a group of radio buttons (radioList) of this type:

$form->field($model, 'radioButtonList')
    ->radioList([
        '1' => 'Первый',
        '2' => 'Второй',
        '3' => 'Третий'
    ]);

2) Since these radiolists are also dynamic through the loop, how to validate them? For example, the fact that in all radiolists the user has selected an item?

Answer 1

use Dynamic Model

Answer 2

1) What do you mean by "dynamically"?
2) For this there is a validator each