Doctrine oneToMany - querying for one - symfony

Question

I have a one to many relationship where one page has many versions.
**page**
id
parent_id
**page_version**
id
page_id
title
published
date
These are related by the foreign key page_id. So I have a Page entity and a PageVersion entity:
class Page
{
/**
* #ORM\OneToMany(targetEntity="PageVersion", mappedBy="page")
*/
private $pageversions;
}
class PageVersion
{
/**
* #var page
*
* #ORM\ManyToOne(targetEntity="Page", inversedBy="pageversions")
*
*/
private $page;
}
So I can get all page versions for each page. However, each page will only ever have one published page version. Therefore, when querying how can I get the latest version? I.e Where published = '1' rather than getting a list of all versions?
Here is an example of my query:
public function findAllPages()
{
$query = $this->getEntityManager()
->createQuery('
SELECT DISTINCT p,v
FROM XYZWebsiteBundle:Page p
JOIN p.pageversions v
WHERE v.published = :published
AND v.deleted = :deleted'
)->setParameters(array('published' => 1, 'deleted' => 0));
try {
return $query->getResult();
} catch (\Doctrine\ORM\NoResultException $e) {
return null;
}
}
However if I loop through the result I can only access the Page properties and not PageVersion properties e.g title, published, date etc.
$entities = $em->getRepository('XYZWebsiteBundle:Page')->findAllPages();
foreach($entities as $entity){
print($entity->getPageVersion()->getTitle());
}
The error returned is Fatal error: Call to undefined method Doctrine\ORM\PersistentCollection::getTitle().

Answer 1

$er = $this->getDoctrine()->getRepository('XYZWebsiteBundle:Page');
$qb = $er->createQueryBuilder('p')
->where('p.published = :published')
->setParameter('published', 1)
;
$entities=$qb->getQuery()->getResult();
If you are sure there will never be no more than 1 page with the published status, you can even use getOneOrNullResult() instead of getResult(). This returns null if there is no matching entity, the entity if there is one matching, and an exception if there is more than one.
Edit: ok, so you have to build the query on PageVersion rather than page then. Try:
$er = $this->getDoctrine()->getRepository('XYZWebsiteBundle:PageVersion');
$qb = $er->createQueryBuilder('p')
->where('p.page = :page')
->setParameter('page', $page)
->andWhere('p.published = :published')
->setParameter('published', 1)
;
$pageVersion=$qb->getQuery()->getResult();
with $page being the page you are trying to find the published version for.