Doctrine get entity with item - php

Question

I want to get the field of an entity that is associated with another .
My entity Offers has a last_offer field.
Offers is related to the Products entity.
Then , with a consultation in my entity Products, I want to get the latest offer associated with the entity Offer.
Controller:
public function lastAction($key)
{
$em = $this->getDoctrine()->getManager();
$last_offer = $em->getRepository('MyAppBundle:Products')->findOfferByKey($key);
$response = new JsonResponse();
return $response->setData($last_offer);
}
My repository:
public function findOfferByKey($key){
$em = $this->getEntityManager();
$dql = 'SELECT pr, of FROM MyAppBundle\AppBundle\Entity\Products pr
INNER JOIN pr.offers of
WHERE pr.key = :key';
$query = $this->getEntityManager()
->createQuery($dql)
->setParameter('key', $key)
->setHydrationMode(\Doctrine\ORM\Query::HYDRATE_ARRAY);
return $query->execute();
}
My routing:
last_offer:
path: /{key}/last_offer
defaults: { _controller: "MyAppBundle:Products:last" }
But, this return an array.
I want to return only last_offer element.
Or to return the entity offers without being in an array.

Answer 1

You're specifically telling doctrine to generate/return an array with this line
->setHydrationMode(\Doctrine\ORM\Query::HYDRATE_ARRAY);
I think all you need to do is remove that line and doctrine will generate/return entities instead. However, you will get a Collection back, so make sure to take that into account. Perhaps something like
public function findOfferByKey($key) {
$dql = 'SELECT pr, of FROM MyAppBundle\AppBundle\Entity\Products pr
INNER JOIN pr.offers of
WHERE pr.key = :key';
$query = $this->getEntityManager()
->createQuery($dql)
->setParameter('key', $key)
;
$results = $query->execute();
if (count($results) !== 1)
{
// It's up to you how to handle zero or multiple rows
}
return $results->current();
}
EDIT
I see what's happening - I wasn't paying attention to your SELECT caluse. You're not selecting just the last_offer columns, you're selecting the entirety of the Products and Offers entities = $results is going to be an array of all of these together. In this scenario, $query->execute() will return an array() instead of a collection.
If you want to select just the Offer entities, you need to modify the SELECT
$dql = 'SELECT of
FROM MyAppBundle\AppBundle\Entity\Products pr
INNER JOIN pr.offers of
WHERE pr.key = :key';
But be wary that this still may return more than one row.