ChoiceFiller.php

<?php

/**
 *  Extract lookup table information from a database to be used in a select field. 
 *  For example, a page can be published, rejected, or pending... 
 * 
 */
 
namespace ICS\CoreBundle\Library;

use Doctrine\Common\Persistence\ObjectManager;

class ChoiceFiller
{

    /** @var ObjectManager $_em */
    protected $_em;

    public function __construct(ObjectManager $em)
    {
        $this->em = $em;
    }

    /**
     * @param $entities
     * @param $id
     * @param $name
     * @return mixed
     * @throws \ErrorException
     */
    protected function entityExtractor($entities, $id, $name)
    {
        foreach($entities as $entity) {
            $entityList[$entity->{$id}()] = $entity->{$name}();
        }

        if (empty($entityList))
            return array();

        //throw new \ErrorException('Query did not execute correctly or didn\'t return any results');

        return $entityList;
    }
}

<?php

namespace ICS\FrontEnd\PageBundle\Library;

use ICS\CoreBundle\Library\ChoiceFiller;

class StatusChoiceFiller extends ChoiceFiller
{

    /**
     * @return \ICS\FrontEnd\PageBundle\Entity\CmsStatus[]
     * @throws \ErrorException
     */
    public function extractStatuses()
    {
        $statuses = $this->em->getRepository('PageBundle:CmsStatus')->findAll();

        return $this->entityExtractor($statuses, 'getId', 'getDescription');
    }

}

//Find and add all statuses to an array
$statuses = new StatusChoiceFiller($em);

$form = $this->createForm(new PagesType(), $entity, array(
    'action' => $this->generateUrl('pages_create'),
    'method' => 'POST',
    'statuses' => $statuses->extractStatuses(),
));