How to remove the required field?

Question

Yii

public function rules()
    {
        return [
          [['car_id', 'driver_id'], 'required'],
            [['car_id', 'driver_id', 'use_new_tariffs', 'town', 'town_center', 'km_price'], 'integer'],
            [['car_id'], 'exist', 'skipOnError' => true, 'targetClass' => Car::className(), 'targetAttribute' => ['car_id' => 'id']],
            [['driver_id'], 'exist', 'skipOnError' => true, 'targetClass' => Driver::className(), 'targetAttribute' => ['driver_id' => 'id']],
          [['town', 'town_center', 'km_price'], 'required', 'when' => function($model){
            return $model->use_new_tariffs;
          }],
        ];
    }

I have the fields 'town', 'town_center', 'km_price' become mandatory if the "use new rates" checkbox is checked and click submit the form. But if you uncheck the box, then the mandatory fields still remain early, how can I fix it?

Answer 1

Use conditional validation.
through WhenClient hang on your checkbox or input, well, or whatever you have.
You have it implemented, but the model is stuck, try using the variable from your checkbox as in the example at the link. like this.
$model->checkBox == true;

Answer 2

As an option:
You can use ajax validation and do this check in the validation action. For example, you can make different scenarios for the model.