FRONTEND_MVC/controllers/ArticlesController.php

<?php

namespace app\controllers;

use yii\web\Controller;

class ArticlesController extends Controller
{
    public function actionIndex(){
		$url = \Yii::$app->request->pathInfo;
		if( $url == 'articles/' || $url == 'article/' || $url == 'article' ){
			$queryString = \Yii::$app->request->queryString?'?'.\Yii::$app->request->queryString:'';
			$this->redirect('/articles'.$queryString, 301);
			return '';
		}
        $news_query = \app\models\front\News::find()->joinWith('topics t')
            ->groupBy('news.id')
            ->andFilterWhere(['news.type'=>6]);
        return $this->render("index",["news_query"=>$news_query]);
    }
}