public function actionView($slug)
{
$article = Article::get($slug);
if (!$article) {
throw new \yii\web\NotFoundHttpException('Article not found.');
}
$article_items = Article::last_items(3, $article->model->item_id);
return $this->render('view', ['article' => $article, 'article_items' => $article_items]);
}
