Yii2 saving attributes in model?

Question

Yii

Hello, the model has an attribute myVar which is stored in Mysql and contains data as a string : '3,4,5,6'. , I can’t figure out why the myVar variable does not change when the model is saved?
Model

...
public function getMyVar(){
  return explode(",", $this->myVar);
}
public function setMyVar($value){
 $this->myVar = implode(",", $value);
}
...

_form.php

...
$form->field($model, 'CreditSecurity')->dropDownList(['...'],['multiple' => 'true'])
...

controller

...
if ($model->load(Yii::$app->request->post()) && $model->save()) {
    return $this->redirect(['...']);
}
...

Answer 1

Find the method in the model
And add your variable to it.