public function actionIndex()
 {
     $categoryRepo = new CategoryRepository();
     $categories = $categoryRepo->getAll('id_category IS NOT NULL');
     $themes = $categoryRepo->getThemes();
     return $this->render('index', ['categories' => $categories, 'themes' => $themes]);
 }
 /**
  * Creates a new ForumCategory model.
  * If creation is successful, the browser will be redirected to the 'view' page.
  * @return mixed
  */
 public function actionCreate()
 {
     $model = new ForumCategory();
     $model->createdAt = date("Y-m-d H:i:s", time());
     $model->updatedAt = date("Y-m-d H:i:s", time());
     $model->id_user = Yii::$app->user->id;
     $categoryRepo = new CategoryRepository();
     $themes = $categoryRepo->getThemes();
     if ($model->load(Yii::$app->request->post()) && $model->save()) {
         return $this->redirect(['/forum/default/index']);
     } else {
         return $this->render('create', ['model' => $model, 'themes' => $themes]);
     }
 }