Cannot access $items collection in class order - symfony

Question

I'm trying to display orders and order items in view like below but the result is an empty collection.
Result from Dump(order.getItems)
Controller:
<?php
namespace App\Controller;
use App\Repository\OrderRepository;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
class MyController extends AbstractController
{
#[Route('/all', name: 'app_index')]
public function index(OrderRepository $orderRepository): Response
{
return $this->render('/index.html.twig', [
'orders' => $orderRepository->findAll()
]);
}
}
Twig:
{% for order in orders %}
{{ dump(order.getItems()) }}
{% endfor %}
I have class Order mapped by orderRef in OrderItem class. The mapping is inversed by the "items" collection in Order class.
Order entity:
<?php
namespace App\Entity;
use App\Repository\OrderRepository;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;
#[ORM\Entity(repositoryClass: OrderRepository::class)]
#[ORM\Table(name: '`order`')]
class Order
{
#[ORM\Id]
#[ORM\GeneratedValue]
#[ORM\Column]
private ?int $id = null;
#[ORM\OneToMany(mappedBy: 'orderRef', targetEntity: OrderItem::class, orphanRemoval: true)]
private Collection $items;
public function __construct()
{
$this->items = new ArrayCollection();
}
public function getId(): ?int
{
return $this->id;
}
/**
* #return Collection<int, OrderItem>
*/
public function getItems(): Collection
{
return $this->items;
}
}
OrderItem entity:
<?php
namespace App\Entity;
use App\Repository\OrderItemRepository;
use Doctrine\ORM\Mapping as ORM;
#[ORM\Entity(repositoryClass: OrderItemRepository::class)]
class OrderItem
{
#[ORM\Id]
#[ORM\GeneratedValue]
#[ORM\Column]
private ?int $id = null;
#[ORM\ManyToOne(inversedBy: 'items')]
#[ORM\JoinColumn(nullable: false)]
private ?Order $orderRef = null;
public function getId(): ?int
{
return $this->id;
}
public function getOrderRef(): ?Order
{
return $this->orderRef;
}
public function setOrderRef(?Order $orderRef): self
{
$this->orderRef = $orderRef;
return $this;
}
}

Answer 1

Instead of a findAll() you can call a new query builder in your repository with an orderBy
public function getSortedOrders()
{
$qb = $this->createQueryBuilder('o')
->orderBy('o.orderRef', 'DESC');
return $qb->getQuery()->getResult();
}```