嵌入表单集合错误：无法确定属性的访问类型 [英] Embed a Collection of Forms Error: Could not determine access type for property

问题描述

根据标签表单的集合嵌入到服务表单中：//symfony.com/doc/current/form/form_collections.htmlrel =nofollow noreferrer>本教程。 标签和服务实体有多对多关系。

表单正确呈现。但是当我提交表单时，我得到

无法确定属性tagList的访问类型

< blockquote>

错误。我不明白为什么新的标签对象未添加到服务类中，通过调用 addTag（）方法。

ServiceType

  public function buildForm（FormBuilderInterface $ builder，array $ options）
 {
 $ builder 
  - > add（'title'，TextType :: class，array（
 'label'=>'标题'
））
; 
 
 $ builder-> add（'tagList'，CollectionType :: class，array（
'entry_type'=> TagType :: class，
'allow_add'=> ; true，
'allow_delete'=> true，
'by_reference'=> false 
）））; 
} 
  

服务类

  {
 .... 
 / ** 
 * @ ORM\ManyToMany（targetEntity =Tag，mappedBy =serviceList = {persist}）
 * / 
 private $ tagList; 
 
 / ** 
 * @return ArrayCollection 
 * / 
 public function getTagList（）
 {
 return $ this-> tagList ; 
} 
 
 / ** 
 * @param标签$标签
 * @return服务
 * / 
 public function addTag（Tag $标签）
 {
 if（$ this-> tagList-> contains（$ tag）== false）{
 $ this-> tagList-> add（$ tag） ; 
 $ tag-> addService（$ this）; 
} 
} 
 
 / ** 
 * @param标签$标签
 * @return服务
 * / 
 public函数removeTag（Tag $ tag）
 {
 if（$ this-> tagList-> contains（$ tag））{
 $ this-> tagList-> removeElement标签）; 
 $ tag-> removeService（$ this）; 
} 
 return $ this; 
} 
} 
  

标签类

  {
 / ** 
 * @ ORM\ManyToMany（targetEntity =Service，inversedBy =tagList）
 * @ ORM\JoinTable（name =tags_services）
 * / 
 private $ serviceList; 
 / ** 
 * @param服务$ service 
 * @return标签
 * / 
 public function addService（Service $ service）
 {
 if（$ this-> serviceList-> contains（$ service）== false）{
 $ this-> serviceList-> add（$ service）; 
 $ service-> addTag（$ this）; 
} 
 return $ this; 
} 
 
 / ** 
 * @param服务$ service 
 * @return标签
 * / 
 public function removeService（Service $服务）
 {
 if（$ this-> serviceList-> contains（$ service））{
 $ this-> serviceList-> removeElement（$ service）; 
 $ service-> removeTag（$ this）; 
} 
 return $ this; 
} 
} 
  

ServiceController

  public function newAction（Request $ request）
 {
 $ service = new Service（）; 
 $ form = $ this-> createForm（'AppBundle\Form\ServiceType'，$ service）; 
 $ form-> handleRequest（$ request）; 
 
 if（$ form-> isSubmitted（）&& $ form-> isValid（））{
 
 $ em = $ this-> getDoctrine ） - > getManager（）; 
 $ em-> persist（$ service）; 
 $ em-> flush（）; 
 
 return $ this-> redirectToRoute（'service_show'，array（'id'=> $ service-> getId（）））; 
} 
 
 return $ this-> render（'AppBundle：Service：new.html.twig'，array（
'service'=> $ service，
'form'=> $ form-> createView（），
））; 
} 
  

解决方案

请你尝试实现来自此网址的代码？

http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/ reference / association-mapping.html＃owning-and-inverse-side-on-a-manytomany-association

首先，请尝试更改映射/逆向，并从 Tag :: addService 方法中删除 $ service-> addTag（$ this）; / p>

I am trying to embed collection of Tag forms to Service form, according to this tutorial. Tag and Service entities have many-to-many relationship.

Form is rendering correctly. But when I submit form, I get

Could not determine access type for property "tagList"

error. I don't understand why new Tag object is not added to the Service class by calling the addTag() method.

ServiceType

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('title', TextType::class, array(
            'label' => 'Title'
        ))
    ;

    $builder->add('tagList', CollectionType::class, array(
        'entry_type' => TagType::class,
        'allow_add' => true,
        'allow_delete' => true,
        'by_reference' => false
    )));
}

Service class

{
....
 /**
 * @ORM\ManyToMany(targetEntity="Tag", mappedBy="serviceList",cascade={"persist"})
 */ 
private $tagList;

/**
 * @return ArrayCollection
 */
public function getTagList()
{
    return $this->tagList;
}

/**
 * @param Tag $tag
 * @return Service
 */
public function addTag(Tag $tag)
{
    if ($this->tagList->contains($tag) == false) {
        $this->tagList->add($tag);
        $tag->addService($this);
    }
}

/**
 * @param Tag $tag
 * @return Service
 */
public function removeTag(Tag $tag)
{
    if ($this->tagList->contains($tag)) {
        $this->tagList->removeElement($tag);
        $tag->removeService($this);
    }
    return $this;
}
}

Tag class

 {
  /**
 * @ORM\ManyToMany(targetEntity="Service", inversedBy="tagList")
 * @ORM\JoinTable(name="tags_services")
 */
private $serviceList;
 /**
 * @param Service $service
 * @return Tag
 */
public function addService(Service $service)
{
    if ($this->serviceList->contains($service) == false) {
        $this->serviceList->add($service);
        $service->addTag($this);
    }
    return $this;
}

/**
 * @param Service $service
 * @return Tag
 */
public function removeService(Service $service)
{
    if ($this->serviceList->contains($service)) {
        $this->serviceList->removeElement($service);
        $service->removeTag($this);
    }
    return $this;
}
 }

ServiceController

  public function newAction(Request $request)
{
    $service = new Service();
    $form = $this->createForm('AppBundle\Form\ServiceType', $service);
    $form->handleRequest($request);

    if ($form->isSubmitted() && $form->isValid()) {

        $em = $this->getDoctrine()->getManager();
        $em->persist($service);
        $em->flush();

        return $this->redirectToRoute('service_show', array('id' => $service->getId()));
    }

    return $this->render('AppBundle:Service:new.html.twig', array(
        'service' => $service,
        'form' => $form->createView(),
    ));
}

解决方案

Could you please try to implement code from this URL?

http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/association-mapping.html#owning-and-inverse-side-on-a-manytomany-association

First, please try to change mapped/inverse sides, and remove $service->addTag($this); from Tag::addService method.

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