How to use KNPPaginatorBundle to paginate results using Doctrine Repository?

Question

I'm working on a Symfony2 project and I decided to use KNPPaginatorBundle to build an easy pagination system. So I created a Product entity and I want to add the paginator to indexAction action (generated by CRUD command).

// Retrieving products.
$em = $this->getDoctrine()->getManager();

//$entities = $em->getRepository('LiveDataShopBundle:Product')->findAll();

$dql   = "SELECT a FROM LiveDataShopBundle:Product a";
$entities = $em->createQuery($dql);

// Creating pagnination
$paginator  = $this->get('knp_paginator');
$pagination = $paginator->paginate(
    $entities,
    $this->get('request')->query->get('page', 1),
    20
);

It works fine but I want to use the Product's repository instead of creating the query directly in the controller. How can I do that ? In fact, directly add the collection of results to the paginate object is just too slow because its load all products then paginate the ArrayCollection.

Thanks in advance.

K4

Answer 1

I suggest using QueryBuilder in your ProductRepository and then passing that to the paginator:

ProductRepository extends EntityRepository
{
    // This will return a QueryBuilder instance
    public function findAll()
    {
        return $this->createQueryBuilder("p");
    }
}

In the controller:

$products = $productRepository->findAll();

// Creating pagnination
$paginator  = $this->get('knp_paginator');
$pagination = $paginator->paginate(
    $products,
    $this->get('request')->query->get('page', 1),
    20
);