Symfony实体属性不更新

Question

我有一个小questuion。

我有一个带有可重复属性标签的文章。当我编辑存在的文章，并添加新的标签都没事。但是如果从文章中的表单移除标签，这个标签仍然存在。

正如我理解的数据绑定到表单和实体。这就是新材料出现在材料中的方式。

但是为什么在绑定新的发布数据后它们不会消失？

public function editAction(Article $article, Request $request) 
    { 
     // The second parameter is used to specify on what object the role is tested. 
     if (!$this->get('security.authorization_checker')->isGranted('IS_AUTHENTICATED_FULLY')) { 
      return $this->redirectToRoute('login'); 
     } 

     // update Article modify date 
     $article->setModifyDate(new \DateTime()); 

     // create form 
     $form = $this->createForm(ArticleType::class, $article, [ 
      'manager' => $this->getDoctrine()->getManager() 
     ]); 

     $form->handleRequest($request); 
     //print_r($article->getTags()); Deleted tag still here 

UPDATE

这里是我的文章实体

** 
* Class Article 
* @package BackendBundle\Entity 
* @ORM\Table(name="articles") 
* @ORM\Entity(repositoryClass="BackendBundle\Entity\ArticleRepository") 
*/ 
class Article 
{ 
    /** 
    * @ORM\Column(type="integer") 
    * @ORM\Id 
    * @ORM\GeneratedValue(strategy="AUTO") 
    */ 
    private $id; 

    /** 
    * @ORM\Column(type="string", length=255, unique=true) 
    * @Assert\NotBlank() 
    */ 
    private $name; 

    /** 
    * @ORM\Column(type="string", length=60, unique=true) 
    * @Assert\NotBlank() 
    */ 
    private $alias; 

    /** 
    * @ORM\Column(type="text") 
    * @Assert\NotBlank() 
    */ 
    private $content; 

    /** 
    * @ORM\Column(type="integer", length=255) 
    * @Assert\NotBlank() 
    */ 
    private $author; 

    /** 
    * @ORM\Column(type="datetime") 
    * @Assert\NotBlank() 
    */ 
    private $publishDate; 

    /** 
    * @ORM\Column(type="datetime") 
    * @Assert\NotBlank() 
    */ 
    private $modifyDate; 

    /** 
    * @ORM\ManyToMany(targetEntity="Tag", inversedBy="articles", cascade={"persist","remove"}) 
    * @ORM\JoinTable(
    *  name="articles_tags", 
    *  joinColumns={@ORM\JoinColumn(name="article_id", referencedColumnName="id")}, 
    *  inverseJoinColumns={@ORM\JoinColumn(name="tag_id", referencedColumnName="id")}) 
    */ 
    private $tags; 

    /** 
    * Article constructor. 
    */ 
    public function __construct() 
    { 
     $this->tags = new ArrayCollection(); 
    } 

    /** 
    * @return int 
    */ 
    public function getId() 
    { 
     return $this->id; 
    } 

    /** 
    * Set article name. 
    * 
    * @param string $name 
    * 
    * @return $this 
    */ 
    public function setName($name) 
    { 
     $this->name = $name; 

     return $this; 
    } 

    /** 
    * Return article name. 
    * @return string 
    */ 
    public function getName() 
    { 
     return $this->name; 
    } 

    /** 
    * Set articles alias. 
    * 
    * @param string $alias 
    * 
    * @return $this 
    */ 
    public function setAlias($alias) 
    { 
     $this->alias = $alias; 

     return $this; 
    } 

    /** 
    * Returns article alias. 
    * @return mixed 
    */ 
    public function getAlias() 
    { 
     return $this->alias; 
    } 

    /** 
    * Set article content. 
    * 
    * @param string $content 
    * 
    * @return $this 
    */ 
    public function setContent($content) 
    { 
     $this->content = $content; 

     return $this; 
    } 

    /** 
    * Return article content 
    * @return string 
    */ 
    public function getContent() 
    { 
     return $this->content; 
    } 

    /** 
    * Set article author 
    * 
    * @param integer $author ID of author 
    * 
    * @return mixed 
    */ 
    public function setAuthor($author) 
    { 
     $this->author = $author; 

     return $this; 
    } 

    /** 
    * Return author id. 
    * @return int Id of the author. 
    */ 
    public function getAuthor() 
    { 
     return $this->author; 
    } 

    /** 
    * Set article publish date. 
    * 
    * @param string $date 
    * 
    * @return $this 
    */ 
    public function setPublishDate($date) 
    { 
     $this->publishDate = $date; 

     return $this; 
    } 

    /** 
    * Return article publish date. 
    * @return string 
    */ 
    public function getPublishDate() 
    { 
     return $this->publishDate; 
    } 

    /** 
    * Set article modify date 
    * 
    * @param string $date 
    * 
    * @return $this 
    */ 
    public function setModifyDate($date) 
    { 
     $this->modifyDate = $date; 

     return $this; 
    } 

    /** 
    * Return article modify date 
    * @return string 
    */ 
    public function getModifyDate() 
    { 
     return $this->modifyDate; 
    } 

    /** 
    * Set tags for article. 
    * 
    * @param ArrayCollection|array $tags 
    * 
    * @return $this 
    */ 
    public function setTags($tags) 
    { 
     if (!empty($tags)) 
     { 
      foreach ($tags as $tag) 
      { 
       $this->setTag($tag); 
      } 
     } 

     return $this; 
    } 

    /** 
    * Set article tag. 
    * 
    * @param Tag $tag 
    * 
    * @return $this 
    * 
    */ 
    public function setTag(Tag $tag) 
    { 
     if (!$this->tags->contains($tag)) 
     { 
      $this->tags->set($tag->getName(), $tag); 
      $tag->setArticle($this); 
     } 

     return $this; 
    } 

    /** 
    * Remove all tags from article. 
    */ 
    public function removeTags() 
    { 
     if(!empty($this->tags)) 
     { 
      foreach($this->tags as $tag) 
      { 
       $this->removeTag($tag); 
      } 
     } 

     return $this; 
    } 

    /** 
    * @param \BackendBundle\Entity\Tag $tag 
    * 
    * @return $this 
    */ 
    public function removeTag(Tag $tag) 
    { 
     if ($this->tags->contains($tag)) 
     { 
      $this->tags->removeElement($tag); 
      $tag->removeArticle($this); 
     } 

     return $this; 
    } 

    /** 
    * Returns all tags for article. 
    * @return ArrayCollection 
    */ 
    public function getTags() 
    { 
     return $this->tags; 
    } 
} 

而且ArticleType

/** 
* Class ArticleType 
* @package AppBundle\Form 
*/ 
class ArticleType extends AbstractType 
{ 
    /** 
    * @param FormBuilderInterface $builder 
    * @param array    $options 
    */ 
    public function buildForm(FormBuilderInterface $builder, array $options) 
    { 
     $tagTransformer = new TagTransformer($options['manager']); 
     $builder 
      ->add('name', TextType::class, array(
       'label_attr' => array('class' => ''), 
       'attr'  => array('class' => 'form-control'), 
       'label'  => 'article.name' 
      )) 
      ->add('alias', TextType::class, array(
       'label_attr' => array('class' => ''), 
       'attr'  => array('class' => 'form-control'), 
       'label'  => 'article.alias' 
      )) 
      ->add('content', TextareaType::class, array(
       'label_attr' => array('class' => ''), 
       'attr'  => array(
        'class' => 'form-control' 
       ), 
       'label'  => 'article.content' 
      )) 
      ->add('publish_date', DateType::class, array(
       'label_attr' => array('class' => ''), 
       'attr'  => array('class' => 'form-control'), 
       'format'  => 'dd-MM-yyyy', 
       'label'  => 'article.publish_date' 
      )) 
      ->add('modify_date', DateType::class, array(
       'label_attr' => array('class' => ''), 
       'attr'  => array('class' => 'form-control'), 
       'format'  => 'dd-MM-yyyy', 
       'label'  => 'article.modify_date' 
      )) 
      ->add($builder->create('tags', CollectionType::class, array(
       'label'  => 'article.tags', 
       'by_reference' => false, 
       'allow_add' => true, 
       'allow_delete' => true, 
      ))->addViewTransformer($tagTransformer)); 
    } 

    /** 
    * @param OptionsResolver $resolver 
    */ 
    public function configureOptions(OptionsResolver $resolver) 
    { 
     $resolver->setDefaults(array(
      'data_class' => 'BackendBundle\Entity\Article', 
     )); 

     $resolver->setRequired(array(
      'manager', 
     )); 

     $resolver->setAllowedTypes('manager', 'Doctrine\Common\Persistence\ObjectManager'); 
    } 
} 

Answer 1

尝试修改添加标签和删除标签功能在Article实体到这样的事情

public function addTag(Tag $tag) 
{ 
    $this->tags[] = $tag; 
    $tag->addArticle($this); 

    return $this; 
} 

public function removeTag(Tag $tag) 
{ 
    $this->tags->removeElement($tag); 
    $tag->removeArticle($this); 
}