How to implement a similar display of related fields?

Question

Yii

There are 3 related tables and 3 models respectively:
Seminar (id, city_id, name, ...);
City (id, region_id, name);
Region (id, name).
In the form you need to display:
seminar.id - seminar.name - city.name - region.name The
city is specified in the Seminar model:

public function getCity()
{
        return $this->hasOne(City::className(), ['id' => 'city_id']);
}

Respectively in view output:
<?php foreach ($seminars as $seminar): ?>

<li>
    	<?=$seminar->date_begin;?>
    	<?=$seminar->city->name;?>
    	<?= Yii::$app->formatter->asDate($seminar->date_begin , 'php:d F');?>
        <?= Html::encode("{$seminar->title}") ?>
    </li>
<?php endforeach; ?>

How to display region.name here?
Thank you!

Answer 1

Add hasOne region id=>region_id to City and then $seminar->city->region->name