FRONTEND_MVC/controllers/ArticlesController.php

<?php

namespace app\controllers;

use yii\web\Controller;

class ArticlesController extends Controller
{
    public function actionIndex(){
        $news_query = \app\models\News::find()->joinWith('topics t')->andFilterWhere(['news.type'=>6]);
        return $this->render("index",["news_query"=>$news_query]);
    }
}