[英]Symfony 4 | ManyToMany Relation - Could not determine access type for property
大家好,
我目前正在研究Symfony 4上的一個項目。我在兩個學說實體(Groupe和Contact)之間建立了ManyToMany關系,但是當我嘗試創建新的聯系人時,出現以下錯誤:(我強調這些實體是使用make:實體創建)。預先感謝您的幫助。
例外:無法確定類“ App \\ Entity \\ Contact”中屬性“ groupe”的訪問類型:可以使用方法“ addGroupe()”,“ removeGroupe”定義類“ App \\ Entity \\ Contact”中的屬性“ groupe” ()”,但新值必須是\\ Traversable的數組或實例,並指定了“ App \\ Entity \\ Groupe”。
// Contact.php
namespace App\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
/**
* @ORM\Entity(repositoryClass="App\Repository\ContactRepository")
* @ORM\Table(name="cm_f_contact")
*/
class Contact
{
// .....
/**
* @ORM\ManyToMany(targetEntity="App\Entity\Groupe", inversedBy="contacts")
* @Assert\Valid
*/
private $groupe;
public function __construct()
{
$this->groupe = new ArrayCollection();
}
/**
* @return Collection|Groupe[]
*/
public function getGroupe(): Collection
{
return $this->groupe;
}
public function addGroupe(Groupe $groupe): self
{
if (!$this->groupe->contains($groupe)) {
$this->groupe[] = $groupe;
}
return $this;
}
public function removeGroupe(Groupe $groupe): self
{
if ($this->groupe->contains($groupe)) {
$this->groupe->removeElement($groupe);
}
return $this;
}
}
// Groupe.php
namespace App\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
/**
* @ORM\Entity(repositoryClass="App\Repository\GroupeRepository")
* @ORM\Table(name="cm_f_group")
*/
class Groupe
{
/**
* @ORM\ManyToMany(targetEntity="App\Entity\Contact", mappedBy="groupe")
*/
private $contacts;
public function __construct()
{
$this->contacts = new ArrayCollection();
}
/**
* @return Collection|Contact[]
*/
public function getContacts(): Collection
{
return $this->contacts;
}
public function addContact(Contact $contact): self
{
if (!$this->contacts->contains($contact)) {
$this->contacts[] = $contact;
$contact->addGroupe($this);
}
return $this;
}
public function removeContact(Contact $contact): self
{
if ($this->contacts->contains($contact)) {
$this->contacts->removeElement($contact);
$contact->removeGroupe($this);
}
return $this;
}
}
// ContactController.php
<?php
namespace App\Controller;
use App\Entity\Contact;
use App\Form\ContactType;
use App\Repository\ContactRepository;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
/**
* @Route("/contact")
*/
class ContactController extends AbstractController
{
//...
/**
* @Route("/new", name="contact_new", methods={"GET","POST"})
*/
public function new(Request $request): Response
{
$contact = new Contact();
$form = $this->createForm(ContactType::class, $contact);
$form->handleRequest($request);
if ($form->isSubmitted() && $form->isValid()) {
$entityManager = $this->getDoctrine()->getManager();
$entityManager->persist($contact);
$entityManager->flush();
return $this->redirectToRoute('contact_index');
}
return $this->render('contact/new.html.twig', [
'contact' => $contact,
'form' => $form->createView(),
]);
}
}
ContactType.php`
<?php
namespace App\Form;
use App\Entity\Contact;
use App\Entity\Groupe;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
class ContactType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('firstname')
->add('lastname')
->add('email')
->add('sms_no')
->add('birth_date')
->add('created_by')
->add('groupes', EntityType::class, [
'class' => Groupe::class,
'choice_label' => 'name',
])
;
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => Contact::class,
]);
}
}
Symfony Forms將使用get<Property>
和set<Property>
讀取和寫入模型數據。 在您的情況下,由於在Contact上沒有setGroupe()
方法,因此在提交表單時表單不知道如何將值寫回實體。
對於這種情況,Symfony表單具有數據映射器 。
數據映射器負責從父表單讀取數據和將數據寫入父表單。
在您的情況下,您可能需要這樣的東西:
public function mapFormToData($forms, &$data)
{
$forms = iterator_to_array($forms);
// "groupe" is the name of the field in the ContactType form
$groupe = $forms['groupe'];
foreach ($groupe as $group) {
// $data should be a Contact object
$data->addGroup($group);
}
// ...Map remaining form fields to $data
}
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