controllers/ItemController.php
protected function storagePath()
    {
        if (\Yii::$app->controller != $this) {
            return false;
        }
        return $this->_storagePath
            ? $this->_storagePath
            : $this->_storagePath 
                = str_replace('@app/web', '', $this->findModel(Yii::$app->request->get('id'))->getStoragePath());
    }
protected function storagePath()
    {
        if (\Yii::$app->controller != $this) {
            return false;
        }
        return $this->_storagePath
            ? $this->_storagePath
            : $this->_storagePath 
                = str_replace('@app/web', '', $this->findModel(Yii::$app->request->get('id'))->getStoragePath());
    }
Gets path to model uploaded files.
@return string path to model uploaded files.
@throws NotFoundHttpException