Yii2: Conditional Validator always returns required

Question

I am trying to use Yii2\'s conditional validator as given in the guide like:

Model code

public function rules()
{
   // $discharged = function($model) {          


        

Answer 1

It seems that by default Yii2 will do validation in BOTH Server side and Client side. Check the example in Conditional Validation part of Yii2 doc:

['state', 'required', 'when' => function ($model) {
    return $model->country == 'USA';
}, 'whenClient' => "function (attribute, value) {
    return $('#country').val() == 'USA';
}"],

you also need a 'whenClient' code, or as @Alexandr Bordun said, to disable the client validation by 'enableClientValidation' => false.