symfony2 : search request

gistfile1

public function indexAction()
    {

    $form = $this->container->get('form.factory')->create(new CustomerSearchType());

    $searchresult = '';
    $keyword = '';

    $request = $this->container->get('request');
    $keyword = $request->request->get('customersearch_keyword');

        if($keyword != '')
        {
            $em = $this->getDoctrine()->getEntityManager();
            $repository = $this->getDoctrine()->getRepository('PiggyBoxTicketBundle:Customer');

                $query = $repository->createQueryBuilder('p')
                    ->where('a.firsname LIKE :keyword OR a.lastname LIKE :keyword')
                    ->orderBy('a.nom', 'ASC')
                    ->setParameter('keyword', '%'.$keyword.'%')
                    ->getQuery();  
           
               $searchresult = $query->getResult();
        }
        else {
            $searchresult = '[]';
        }

    $view = View::create();
    $handler = $this->get('fos_rest.view_handler');
    if ('html' === $this->getRequest()->getRequestFormat()){
        $view->setData(array('form'=> $form));
    }
        
    else{
        $view->setData($searchresult);
    }
    $view->setTemplate('PiggyBoxTicketBundle:Customer:index.html.twig');

    return $view;
        
    }