I get this error message: Expected argument of type "App\Entity\Artist or null", "string" given at property path "artist".
This is the code of my form in symfony
$builder
->add('date', DateType::class, [
'widget' => 'single_text'
])
->add('artist', TextType::class)
->add('City',TextType::class)
;
And this is the template:
{{ form_start(form)}}
{{ form_widget(form)}}
<button class="btn btn-secondary">{{ button|default('Enregistrer')}}</button>
{{ form_end(form)}}
Entity
class Artist
{
/**
* @ORM\Id()
* @ORM\GeneratedValue()
* @ORM\Column(type="integer")
*/
private $id;
/**
* @ORM\Column(type="string", length=45)
*/
private $name;
/**
* @ORM\OneToMany(targetEntity="App\Entity\Event", mappedBy="artist", cascade={"persist","remove"})
*/
private $events;
public function __construct()
{
$this->events = new ArrayCollection();
}
public function getId(): ?int
{
return $this->id;
}
public function getName(): ?string
{
return $this->name;
}
public function setName(?string $name): self
{
$this->name = $name;
return $this;
}
/**
* @return Collection|Event[]
*/
public function getEvents(): Collection
{
return $this->events;
}
public function addEvent(Event $event): self
{
if (!$this->events->contains($event)) {
$this->events[] = $event;
$event->setArtist($this);
}
return $this;
}
public function removeEvent(Event $event): self
{
if ($this->events->contains($event)) {
$this->events->removeElement($event);
// set the owning side to null (unless already changed)
if ($event->getArtist() === $this) {
$event->setArtist(null);
}
}
return $this;
}
public function __toString()
{
return $this->name;
}
}
This is the error :
Uncaught PHP Exception Symfony\Component\PropertyAccess\Exception\InvalidArgumentException: "Expected argument of type "App\Entity\Artist or null", "string" given at property path "artist"." at D:\wamp64\www\app_music_events\vendor\symfony\property-access\PropertyAccessor.php line 173
{
"exception": {}
}
This is the controller
/**
* Method for editing an event
*
* @Route("/admin/edit/{id}", name="admin.edit", methods="GET|POST")
* @param Request $request
* @return \Symfony\Component\HttpFoundation\Response
*/
public function edit(Event $event, Request $request): Response
{
$form = $this->createForm(EventType::class, $event);
$form->handleRequest($request);
if ($form->isSubmitted() && $form->isValid()) {
$this->em->flush();
$this->addFlash('success', 'Le concert a été modifié avec succès !');
return $this->redirectToRoute('admin.index');
}
return $this->render('admin/edit.html.twig', [
'event' => $event,
'form' => $form->createView()
]
);
}
I don't understand. I do not have this problem when I do not specify Textype in the form.
What is the problem? Thanks
The problem is that you need to persist an Artist entity along with your Event. Symfony expects an Artist entity type and not a string. Try with EntityType::class
instead of TextType::class
->add('artist', EntityType::class, [
'class' => Artist::class
]);
For more information on the EntityType field, please check the documentation