common\models\User::tableName PHP Method

    public static function tableName()
    {
        return '{{%user}}';
    }

 public function actionTopic($username)
 {
     $this->title = $username . '提的建议 - ' . Yii::$app->name;
     $this->description = '';
     $this->canonical = Yii::$app->params['domain'] . 'member/' . $username . '/topic';
     $user = $this->findModel($username);
     $query = (new Query())->select('topic.*, node.enname, node.name, user.username, user.avatar')->from(Topic::tableName())->leftJoin(Node::tableName(), 'node.id = topic.node_id')->leftJoin(User::tableName(), 'user.id = topic.user_id')->where(['node.is_hidden' => 0])->andWhere(['topic.user_id' => $user->id]);
     $pagination = new Pagination(['defaultPageSize' => Yii::$app->params['pageSize'], 'totalCount' => $query->count()]);
     $model = $query->orderBy(['id' => SORT_DESC])->offset($pagination->offset)->limit($pagination->limit)->all();
     return $this->render('topic', ['model' => $model, 'user' => $user, 'pagination' => $pagination]);
 }