How to make one of the checkboxes mandatory Yii2?

Question

Yii

Good day! I have 5 fields with checkbox type. How can I do it in Yii2 so that if at least one of them was filled, then the validation is successful, otherwise, say that select at least one checkbox. Thanks in advance!

Answer 1

www.yiiframework.com/doc-2.0/yii-validators-valid...

[['check1','check2','check3'],'required','when'=>function ($model) {
    return ($model->check1 == null and $model->check2 == null and $model->check3 == null);
}, 'message'=>'чудак, чекни хоть что-нибудь']

Answer 2

write a validation javascript: check the values ​​of all checkboxes and if everything is not checkd, then show an error message

Answer 3

Change checkbox to radio and make it required

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