Yii2 form model

BadgeForm.php

<?php
namespace backend\models\forms;

use common\models\Badge;
use common\models\BadgeCountryAccess;
use Yii;
use yii\base\Model;
use yii\web\UploadedFile;

/**
 * Class BadgeForm
 * @package backend\models\forms
 * @property Badge $badge
 * @property BadgeCountryAccess[] $countriesAccess
 */
class BadgeForm extends Model
{
    public $countriesAccess;

    public function rules()
    {
        return [
            [['Badge'], 'required'],
            [['BadgeCountryAccess'], 'safe'],
        ];
    }

    public function beforeValidate()
    {
        $imageInstance = UploadedFile::getInstance($this->badge, 'imageFile');
        if ($imageInstance) {
            $this->badge->imageFile = $imageInstance;
        }
        return parent::beforeValidate();
    }

    public function afterValidate()
    {
        $error = false;
        if (!$this->badge->validate()) {
            $error = true;
        }
        if (!Model::validateMultiple($this->countriesAccess)) {
            $error = true;
        }
        if ($error) {
            $this->addError(null); // add an empty error to prevent saving
        }
        parent::afterValidate();
    }

    public function save()
    {
        if (!$this->validate()) {
            return false;
        }
        $transaction = Yii::$app->db->beginTransaction();
        if (!$this->badge->save()) {
            $transaction->rollBack();
            return false;
        }
        $DA = [];
        foreach ($this->countriesAccess as $country) {
            $DA = array_merge($DA, $country->getDirtyAttributes());
        }
        if (!empty($DA)) {
            if ($this->countriesAccess[0]::deleteAll(['bca_badge_id' => $this->badge->badge_id]) === false) {
                $transaction->rollBack();
                return false;
            }
            $rows = [];
            foreach ($this->countriesAccess as $country) {
                if ($country->is_available === true) {
                    $country->bca_badge_id = $this->badge->badge_id;
                    $rows[] = $country->getAttributes(null, ['is_available']);
                }
            }
            if (!empty($rows)) {
                if (!\Yii::$app->db->createCommand()->batchInsert($this->countriesAccess[0]::tableName(), array_keys($rows[0]), $rows)->execute()) {
                    $transaction->rollBack();
                    return false;
                }
            }
        }

        $transaction->commit();
        return true;
    }

    public function setBadgeCountryAccess($val)
    {
        if (empty($this->countriesAccess)) {
            $this->countriesAccess = $val;
        } else {
            Model::loadMultiple($this->countriesAccess, $val, '');
        }
    }

    public function getBadgeCountryAccess()
    {
        return $this->countriesAccess ?? [];
    }

    public function setBadge($val)
    {
        if (empty($this->badge)) {
            $this->badge = $val;
        } else {
            $this->badge->load($val, '');
        }
    }

    public function getBadge()
    {
        return $this->badge ?? null;
    }

    /**
     * override
     * @param array $data
     * @param null $formName
     */
    public function load($data, $formName = null)
    {
        $this->setAttributes($data);
    }
}