special paging requirement in symfony - php

Question

Im triing to create this logic, but i can't reach any goal.
i habe a list of Feeds.It is sometimes veri large almost 2000 entries.
now i want to create a Read function which gives me the first 40 entries and when i have read them or i have scrolled fully to the buttom the next 40 entries should be append at the buttom of the list.
My current staff:
i created a Paging with page and pagesize but the Problem is the following:
let say we have total 20 entries and a begin to request the entries:
page 1 5 items items 0 - 5 of the list (if the ar read they aren't in the list anymore!)
not i load page 2 => items 5-0 aso.. at a point it crosses itself and no items will be retrned!
has anyone an Idea how i can fix this ??
thanks

Answer 1

You must use Paginator class. There is a working example on one of my repositories class:
<?php
namespace Fluency\Bundle\GeneralBundle\Entity\Repository;
use Doctrine\ORM\EntityRepository,
Doctrine\ORM\Tools\Pagination\Paginator;
use Fluency\Bundle\GeneralBundle\Entity\Country;
/**
* CountryRepository
*
* This class was generated by the Doctrine ORM. Add your own custom
* repository methods below.
*/
class CountryRepository extends EntityRepository
{
/**
* #param array $criteria
* #param null $limit
* #param null $start
* #return array with this format (0 => $result, 1 => $counter)
*/
public function findAllByCriteria($criteria = array(), $limit = null, $start = null)
{
$query = $this->getEntityManager()->createQueryBuilder()
->select('c')
->from($this->getEntityName(), 'c')
->orderBy('c.name', 'ASC');
if(null !== $limit)
{
$query->setMaxResults($limit);
}
if(null !== $start)
{
$query->setFirstResult($start);
}
if(!empty($criteria))
{
if($criteria['active'])
{
$query->andWhere($query->expr()->eq('c.active', $criteria['active']));
}
}
$paginator = new Paginator($query);
return array($query->getQuery()->getArrayResult(), $paginator->count());
}
.................
}