ปัญหา error ของ yii - call to a member function getCount() on array

public function actionIndex()
    {
        $sql = "SELECT * FROM orders";
        $command = Yii::$app->db->createCommand($sql);
        $dataProvider = $command->queryAll();

        return $this->render('index', [
            //'searchModel' => $searchModel,
            'dataProvider' => $dataProvider,
        ]);
    }

<?= GridView::widget([
        'dataProvider' => $dataProvider,
        'columns' => [
            ['class' => 'yii\grid\SerialColumn'],

            //'customer.name',
            'id',
            'price',
            //'customer.type',
            //'status',

            ['class' => 'yii\grid\ActionColumn'],
        ],
    ]); ?>