How to correctly save data to db after uploading a file in Yii2?

Question

Yii

Model:

class Info extends ActiveRecord
{
    public $img_preview;
    public $img_full;

    public static function tableName()
    {
        return '{{info}}';
    }

    public function rules() {
        return [
            [['title', 'preview', 'description_seo'], 'string', 'length' => [0, 255]],
            [['title', 'preview', 'description_seo'], 'filter', 'filter' => 'strip_tags'],
            [['title', 'preview', 'description_seo'], 'trim'],
            [['title', 'preview', 'description_seo'], 'required'],
            [['img_preview', 'img_full'], 'file', 'skipOnEmpty' => false, 'extensions' => 'jpg, jpeg'],
            ['description', 'safe'],
        ];
    }

    public function upload() {
        if ( $this->validate() ) {
            // Создание директории
            $folderName = $this->generateUniqFileName("web/info");
            FileHelper::createDirectory( Yii::getAlias("@frontend/web/img/info/$folderName") );

            // Создание файла
            $imgPreviewName = $folderName . '/' . $this->generateUniqFileName("web/info/$folderName") . '.' . $this->img_preview->extension;
            $this->img_preview->saveAs( Yii::getAlias("@frontend/web/img/info/$imgPreviewName") );

            // Создание Файла
            $imgFullName = $folderName . '/' . $this->generateUniqFileName("web/info/$folderName") . '.' . $this->img_full->extension;
            $this->img_full->saveAs( Yii::getAlias("@frontend/web/img/info/$imgFullName") );

            // Перезаписать файлы их директорией
            $this->img_preview = $imgPreviewName;
            $this->img_full = $imgFullName;

            return true;
        }

        return false;
    }

    public function generateUniqFileName($path) {
        $name = bin2hex(random_bytes(8));

        if ( file_exists( Yii::getAlias("@frontend/$path/$name") ) ) return $this->generateUniqFileName();
        else return $name;
    }

    public function attributeLabels()
    {
        return [
            'title' => 'Заголовок',
            'preview' => 'Превью',
            'description' => 'Описание новости',
            'img_preview' => 'Фотография (Превью)',
            'img_full' => 'Фотография (Основная)',
            'description_seo' => 'Description (SEO)',
        ];
    }

    public function behaviors()
    {
        return [
            'purify' => array(
                'class' => PurifyBehavior::className(),
                'attributes' => array('description'),
                'config' => function ($config) {
                    $def = $config->getHTMLDefinition(true);

                    $config->set('HTML.AllowedElements', array('p', 'span', 'h1', 'h2', 'h3', 'h4', 'a', 'br', 'strong', 'em', 'del', 'u', 'pre', 'code', 'blockquote'));

                    $def->addAttribute('a', 'url', 'Text');
                    $def->addAttribute('a', 'title', 'Text');
                    $def->addAttribute('a', 'target', 'Text');

                    $def->addAttribute('p', 'style', 'Text');
                    $def->addAttribute('span', 'style', 'Text');
                    $def->addAttribute('del', 'style', 'Text');
                    $def->addAttribute('u', 'style', 'Text');
                    $def->addAttribute('em', 'style', 'Text');

                    $def->addAttribute('img', 'src', 'Text');
                    $def->addAttribute('img', 'alt', 'Text');

                    $config->set('HTML.SafeIframe', true);
                    $config->set('URI.SafeIframeRegexp', '%^(http:|https:)?//(www.youtube(?:-nocookie)?.com/embed/|player.vimeo.com/video/)%');

                    $config->set('AutoFormat.RemoveEmpty', true);
                    $config->set('AutoFormat.RemoveEmpty.RemoveNbsp', true);
                    $config->set('AutoFormat.AutoParagraph', true);
                }
            )
        ];
    }
}

Controller:

public function actionAdd()
{
    $model = new Info();

    if ( $model->load(Yii::$app->request->post()) ) {
        $model->img_preview = UploadedFile::getInstance($model, 'img_preview');
        $model->img_full = UploadedFile::getInstance($model, 'img_full');

        $model->upload();

        if ( $model->save() ) {
            Yii::$app->session->setFlash('message', 'Информация добавлена!');

            return $this->refresh();
        }

        Yii::$app->session->setFlash('message', 'Не правильные данные!');
    }

    return $this->render('add', compact('model'));
}

MySql:



After the $model->upload();save call, validation fails because the files are overwritten there:

$this->img_preview = $imgPreviewName;
$this->img_full = $imgFullName;

If you delete the lines with overwriting the file, then the error appears:

finfo_file(C:\projects\yuk\tmp\php8015.tmp): failed to open stream: No such file or directory

In general, I would like not to create separate variables for the file and for its name, but to process the files, put their path into these variables, and save them to the database. So that when $model->save()
$img_preview, $img_fullare saved in the database.