Why doesn't native validation work in yii2?

Question

Yii

gentlemen, there is a problem: I do my own validation, add to the rules:

['role', 'required'],
['role', 'validateRole'],

Next, the method:

// Role validation:
    public function validateRole($attribute, $params) {
    	if (!in_array($this->$attribute, ['admin','distributor','reseller','customer'])) {
            $this->addError($attribute, 'Wrong Role');
        }
    }

In this case, only required on the frontend works.
I even tried doing this:

// Role validation:
    public function validateRole($attribute, $params) {
            $this->addError($attribute, 'Wrong Role');
    }

but at the same time, the frontend is empty, no errors.
Even if inside ValidateRole just write die(); - nothing crashes, but if you remove the validateRole method, but leave it in rules, then YII gives an error

Exception 'ReflectionException' with message 'Class validateRole does not exist'

But why class?
What am I doing wrong?

Answer 1

why reinvent the wheel?

['role', 'required'],
['role', 'in', 'range' => ['admin', 'distributor', 'reseller', 'customer'], 'message' => 'Wrong Rule'],

Answer 2

Press submit and you will get an error. And on the client you need to do clientValidation

Answer 3

Sergey : yes, below you were answered correctly. It shouldn't have worked on the frontend, sorry, I just didn't notice. For the frontend, you need to write your own rules, see
www.yiiframework.com/doc-2.0/yii-validators-valida...