How to get related items in controller (Symfony2.8) - php

Question

For this question I have 3 entities in my DB :
Case to Line : 1 Case to Many Lines (1 case have n lines)
Line to Loan : 1 Line to Many Loans (1 line have n loans)
I want in my controller to get a Case(Dosier) by ID, then to foreach lines, and then to foreach every loan.
So, with every loan object I want to perform some calculations and collect all this data.
How can I access the loan object, to make next things like ($loan->getCapital(), $loan->getDuration() for my calculations?
I tried in this way :
/**
* #Route("/", name="homepage")
*/
public function indexAction(Request $request)
{
$user = $this->getUser();
$dosiers = $this->getDoctrine()
->getRepository('AppBundle:Dosier')
->createQueryBuilder('e')
->select('e')
->where('e.userId = :id')
->andwhere('e.isActive = 1')
->orderBy('e.id', 'DESC')
->setParameters(array('id'=> $user))
->getQuery()
->getResult();
foreach ($line as $dosiers->getLines()) {
foreach ($loan as $line->getLoans()) {
echo $loan->getName();
}
}
return $this->render('AppBundle:default:index.html.twig', array(
'dosiers' => $dosiers
));
}//indexAction
But it gives me error :
Compile Error: Can't use method return value in write context

Answer 1

Ah, I find a solution :
This code :
$dosiers = $this->getDoctrine()
->getRepository('AppBundle:Dosier')
->createQueryBuilder('e')
->select('e')
->where('e.userId = :id')
->andwhere('e.isActive = 1')
->orderBy('e.id', 'DESC')
->setParameters(array('id'=> $user))
->getQuery()
->getResult();
returns an array of objects that match that conditions, instead returning one object.
So, I changed the query for test in :
$dosiers = $em->getRepository('AppBundle:Dosier')->findOneBy(array('id' => 15));
and the loop to :
foreach ($dosiers->getLines() as $line) {
foreach ($line->getLoans() as $loan) {
echo $loan->getName();
}
}
and now it works. Next, need just to add a new parameter to the action, $id, and instead of constant '15' in query to put $id.