How to query database data with Doctrine and Symfony - php

Question

I have a line like this
// $repository is my repository for location data
$locationObject = $repository->findOneBy(array('name' => $locationName));
Which selects the first record it can find from the Locations table. Which is fair enough.
However, I have some additional data in that table to make the query more precise. Specifically, an "item_name" column. In the Location class it is specified as such:
/**
* #ORM\ManyToOne(targetEntity="Item", inversedBy="locations", cascade={"persist", "remove"})
* #ORM\JoinColumn(name="item_id", referencedColumnName="item_id", onDelete="CASCADE")
*/
protected $item;
So there is also an Item table with item_id, item_name, etc.
What I want to do is change the original findOneBy() to also filter by item name. So I want something like:
$locationObject = $repository->findOneBy(array('name' => $locationName, 'item' => $itemName));
But because $item is an object in the Locations class rather than a string or an ID obviously that wouldn't work. So really I want to somehow much against item->getName()...
I'm not sure how I can do this. Does anyone have any suggestions?
Thanks

Answer 1

I guess you must create a custom query with join. It's better you create a custom repository class for this entity and then creates a custom query build inside it.
Entity:
// src/AppBundle/Entity/Foo.php
/**
* #ORM\Table(name="foo")
* #ORM\Entity(repositoryClass="AppBundle\Repository\FooRepository")
*/
class Foo
{
...
}
Your repository:
// src/AppBundle/Repository/FooRepository.php
use Doctrine\ORM\EntityRepository;
class FooRepository extends EntityRepository
{
public function findByYouWant($id)
{
// your query build
}
}
Controller:
// src/AppBundle/Controller/FooController.php
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
class FooController extends Controller
{
public function showAction()
{
// ... your code
$locationObject = $repository->findByYouWant($id);
}
}

Answer 2

You should add a method to your Location repository class, and create a query similiar to the one below:
class LocationRepository extends EntityRepository
{
public function findLocationByItemName($locationName, $itemName)
{
$qb = $this->createQueryBuilder('location');
$qb->select('location')
->innerJoin(
'MyBundle:Item',
'item',
Query\Expr\Join::WITH,
$qb->expr()->eq('location.item', 'item.item_id')
)
->where($qb->expr()->like('location.name', ':locationName'))
->andWhere($qb->expr()->like('item.name', ':itemName'))
->setParameter('locationName', $locationName)
->setParameter('itemName', $itemName);
$query = $qb->getQuery();
return $query->getResult();
}
}

Answer 3

You have to use a custom dql.You can construct it using the querybuilder.
//in your controller
protected function getEntities($itemName){
$em = $this->get('doctrine.orm.default_entity_manager');
$qb = $em->createQueryBuilder();
$qb->select('a')->from('YourBundleAlias:YourEntityName', 'a')->join('a.item','b')->where('b.item = :item')->setParameter('item', $itemName);
return $qb->getQuery()->execute();
}

Answer 4

This is as easy as:
$locationObject = $repository->findOneBy(array(
'name' => $locationName,
'item' => $itemObject
));
Using Doctrine2 in order to do a findBy on a related entity field you must supply an entity instance: $itemObject.