Yii validation on dependent fields?

Question

Yii

I can't figure out what I'm doing wrong. It seems to be doing everything right, but it gives a validation error.
It is necessary for me that when the fields of one of the dates are not empty, then the second field gives an error if it is not filled. And when the fields are empty - do not issue an error for mandatory filling

[['date_from', 'date_to'], 'required', 'when' => function() {
                return $this-> date_from !== null || $this-> date_to !== null ;
            }],

And it also does not work when another field is equal to a certain value. Either way it throws an error!

[['description'], 'required', 'when' => function() {
                return  (int) $this->status == self::STATUS_REFUSED;
            }],

Answer 1

Goodnight.
You should try this design.
Should work.

['date_to', 'required', 'when' => function($model, $attribute){
                return $model->date_from == 1;
            }, 'whenClient' => "function (attribute, value) {
                   return $('#uploadsfiles-date_from').val() == 1;
            }"]