Bug Symfony Can use "yield from" only with arrays - php

Question

I'm creating a website with Symfony 5. I have a problem that I can't solve.
I need to be able to create entities and for that I want to use a form generated by Symfony.
Symfony sends me this error:
Can use "yield from" only with arrays and Traversables
If I modify anything in my "Entities" entity then symfony sends me back:
My field I was waiting for
Great, that's exactly what I need, but the problem is that if I refresh the page the error comes back.
<?php
namespace App\Controller\Admin;
use App\Entity\Entities;
use App\Entity\Events;
use App\Form\EntitiesType;
use App\Form\EventsType;
use App\Repository\CriteriasRepository;
use App\Repository\EntitiesRepository;
use App\Repository\EventsRepository;
use Doctrine\Persistence\ObjectManager;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
Class AdminHome extends AbstractController {
protected $event;
protected $entity;
protected $criteria;
protected $twig;
public function __construct(EventsRepository $event, EntitiesRepository $entity, CriteriasRepository $criteria, ObjectManager $em)
{
$this->event = $event;
$this->entity = $entity;
$this->criteria = $criteria;
$this->em = $em;
}
public function index(){
$event = $this->event->findOneBy(['current' => 1]);
$criterias = $this->indexCriteria($event);
$entities = $this->indexEntity($event);
return new Response($this->render('admin/home.html',[ 'event' => $event, 'entities' => $entities, 'criterias' => $criterias ]));
}
public function indexEntity(Events $event){
return $event->getEntity();
}
public function indexCriteria(Events $event){
return $event->getCriterias();
}
/**
* #Route("/admin/event/create", name="admin.event.new")
*/
public function newEvent(Request $request){
$event = new Events();
$form = $this->createForm(EventsType::class, $event);
$form->handleRequest($request);
if($form->isSubmitted() && $form->isValid()){
$this->em->persist($event);
$this->em->flush();
return $this->redirectToRoute('adminHome');
}
return $this->render('admin/event/eventNew.html', ['event' => $event, 'form' => $form->createView()]);
}
/**
* #Route("/admin/entity/create", name="admin.entity.new")
*/
public function newEntity(Request $request){
$entity = new Entities();
$form = $this->createForm(EntitiesType::class, $entity);
$form->handleRequest($request);
if($form->isSubmitted() && $form->isValid()){
$this->em->persist($entity);
$this->em->flush();
return $this->redirectToRoute('adminHome');
}
return $this->render('admin/entity/entityNew.html', ['entity' => $entity, 'form' => $form->createView()]);
}
// /**
// * #Route("/admin/entity/edit", name="admin.entity.edit")
// */
// public function editEntity(Entities $entity, Request $request){
// $form = $this->createForm(EntityType::class, $entity);
// $form->handleRequest($request);
// if($form->isSubmitted() && $form->isValid()){
// $this->em->flush();
// return $this->redirectToRoute('adminHome');
// }
// return $this->render('admin/entityEdit.html', ['entity' => $entity, 'form' => $form->createView()]);
// }
}
?>
<?php
namespace App\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity(repositoryClass=EntitiesRepository::class)
*/
class Entities
{
/**
* #ORM\Id
* #ORM\GeneratedValue
* #ORM\Column(type="integer")
*/
private $id;
/**
* #ORM\Column(type="string", length=255)
*/
private $entityName;
/**
* #ORM\OneToMany(targetEntity=Rates::class, mappedBy="entity")
*/
private $rates;
/**
* #ORM\ManyToMany(targetEntity=Events::class, mappedBy="entity")
*/
private $event;
/**
* #ORM\Column(type="string", length=255)
*/
private $descriptionFr;
/**
* #ORM\Column(type="string", length=255, nullable=true)
*/
private $descriptionEn;
/**
* #ORM\ManyToMany(targetEntity=Themes::class, inversedBy="entities")
*/
private $theme;
public function __construct()
{
$this->rates = new ArrayCollection();
$this->event = new ArrayCollection();
$this->theme = new ArrayCollection();
}
public function getId(): ?int
{
return $this->id;
}
public function getEntityName(): ?string
{
return $this->entityName;
}
public function setEntityName(string $entityName): self
{
$this->entityName = $entityName;
return $this;
}
/**
* #return Collection|Rates[]
*/
public function getRates(): Collection
{
return $this->rates;
}
public function addRate(Rates $rate): self
{
if (!$this->rates->contains($rate)) {
$this->rates[] = $rate;
$rate->setEntity($this);
}
return $this;
}
public function removeRate(Rates $rate): self
{
if ($this->rates->removeElement($rate)) {
// set the owning side to null (unless already changed)
if ($rate->getEntity() === $this) {
$rate->setEntity(null);
}
}
return $this;
}
/**
* #return Collection|Events[]
*/
public function getEvent(): Collection
{
return $this->event;
}
public function addEvent(Events $event): self
{
if (!$this->event->contains($event)) {
$this->event[] = $event;
$event->addEntity($this);
}
return $this;
}
public function removeEvent(Events $event): self
{
if ($this->event->removeElement($event)) {
$event->removeEntity($this);
}
return $this;
}
public function getDescriptionFr(): ?string
{
return $this->descriptionFr;
}
public function setDescriptionFr(string $descriptionFr): self
{
$this->descriptionFr = $descriptionFr;
return $this;
}
public function getDescriptionEn(): ?string
{
return $this->descriptionEn;
}
public function setDescriptionEn(?string $descriptionEn): self
{
$this->descriptionEn = $descriptionEn;
return $this;
}
/**
* #return Collection|Themes[]
*/
public function getTheme(): Collection
{
return $this->theme;
}
public function addTheme(Themes $theme): self
{
if (!$this->theme->contains($theme)) {
$this->theme[] = $theme;
}
return $this;
}
public function removeTheme(Themes $theme): self
{
$this->theme->removeElement($theme);
return $this;
}
}
<?php
namespace App\Form;
use App\Entity\Entities;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
class EntitiesType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('entityName')
->add('descriptionFr' )
->add('descriptionEn')
->add('event')
->add('theme')
;
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => Entities::class,
]);
}
}
{{ form_start(form) }}
{{ form_rest(form) }}
<button class="btn">{{ button|default('Créer')}}</button>
{{ form_end(form) }}