class ProjectController extends Controller
{
    public function actionIndex()
    {
        $projectSearch = new ProjectSearch();
        $projectSearch->load(\Yii::$app->request->get());
        if (!$projectSearch->validate()) {
            throw new BadRequestHttpException('Invalid parameters: ' . json_encode($projectSearch->getErrors()));
        }
        return $projectSearch->getDataProvider();
    }
}