Symfony2, How can I pass parameters sort and direction using KnpPaginatorBundle and QueryBuilder

Question

I'm using KnpPaginatorBundle and I'm using QueryBuilder in Repository to select data. I'd like to know how can I pass parameters sort and direction sent by Form in the query.

This is th form:

<form action="" method="get" class="form_sort" id="myForm">
                        <span class="manage_title">Sort by:</span>
                            <select class="select_styled white_select" id="sort_list" name="option">
                                <option value="">-------</option>
        {{ knp_pagination_sortable(pagination, 'Country A-Z', 'country', {'sort': 'country', 'direction': 'asc'}) }}
        {{ knp_pagination_sortable(pagination, 'Country Z-A', 'country', {'sort': 'country', 'direction': 'desc'}) }}
        {{ knp_pagination_sortable(pagination, 'City A-Z', 'destination', {'sort': 'destination', 'direction': 'asc'}) }}
        {{ knp_pagination_sortable(pagination, 'City Z-A', 'destination', {'sort': 'destination', 'direction': 'desc'}) }}
                            </select>
</form>

Action Controller:

public function listAction($page, Request $request)
{
$em = $this->getDoctrine()->getManager();

$paginator  = $this->get('knp_paginator');


$listTravels = $em->getRepository('ProjectTravelBundle:Travel')->getListTravelsFrontend();

$pagination = $paginator->paginate(
    $listTravels,
    $this->get('request')->query->get('page', $page)/*page number*/,
    10/*limit per page*/
);

return $this->render('ProjectFrontendBundle:Frontend:list.html.twig',array(
    'pagination' => $pagination
));
}

TravelReopsitory:

public function getListTravelsFrontend()
{

$qb = $this->createQueryBuilder('t')
    ->leftJoin('t.image', 'i')
    ->addSelect('i')
    ->leftJoin('t.agence', 'a')
    ->addSelect('a')
    ->Where('t.enabled = 1');

return $qb->getQuery()->getResult();

}

Answer 1

Sorting is handle on database layery (using mysql ORDER BY ) so you can't pass array of data from getResult() . You would have to pass QueryBuilder instance as a target to you paginate() call. KnpPaginator have special Listener and Walker that can modify your query with correct ORDER BY based on request and then eqecute an paginate it for you.

TravelReopsitory:

public function getListTravelsFrontendQueryBuilder()
{
   $qb = $this->createQueryBuilder('t')
       ->leftJoin('t.image', 'i')
       ->addSelect('i')
       ->leftJoin('t.agence', 'a')
       ->addSelect('a')
       ->Where('t.enabled = 1');

return $qb;
}

Action Controller:

public function listAction($page, Request $request)
{
$em = $this->getDoctrine()->getManager();

$paginator  = $this->get('knp_paginator');

$qb = $em->getRepository('ProjectTravelBundle:Travel')->getListTravelsFrontendQueryBuilder();

$pagination = $paginator->paginate(
    $qb,
    $request->query->get('page', $page)/*page number*/,
    10/*limit per page*/
);

return $this->render('ProjectFrontendBundle:Frontend:list.html.twig',array(
    'pagination' => $pagination
));
}