Question

我尝试制作代码系统，每篇文章都有多个代码，我是基于Symfony的文档How to Embed a collection of forms

这是我的文章实体：

<?php

namespace DEERCMS\ArticleBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
use Doctrine\Common\Collections\ArrayCollection;

/**
 * Article
 *
 * @ORM\Table(name="article")
 * @ORM\Entity(repositoryClass="PTB\ArticleBundle\Repository\ArticleRepository")
 */
class Article
{

    /...

    /**
     * @var string
     *
     * @ORM\Column(name="tags", type="string", length=255)
     * @ORM\ManyToMany(targetEntity="DEERCMS\ArticleBundle\Entity\Tag", cascade={"persist"})
     */
    protected $tags;

    public function __construct() 
    {
        $this->date = new \DateTime();
        $this->tags = new ArrayCollection();
    }


    public function getTags()
    {
        return $this->tags;
    }

    public function addTag(Tag $tag)
    {
        $tag->addTask($this);

        $this->tags->add($tag);
    }

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

    /**
     * Set tags
     *
     * @param string $tags
     *
     * @return Article
     */
    public function setTags($tags)
    {
        $this->tags = $tags;

        return $this;
    }
}

标记实体

<?php

namespace DEERCMS\ArticleBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * Tag
 *
 * @ORM\Table(name="tag")
 * @ORM\Entity(repositoryClass="DEERCMS\ArticleBundle\Repository\TagRepository")
 */
class Tag
{
    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="name", type="string", length=255)
     */
    private $name;


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

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

        return $this;
    }

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

}

ArticleType：

        $builder
        ->add('title')
        ->add('article', TextareaType::class)
        ->add('img',  FileType::class, array('label' => 'Zdjęcie do artykułu (img)', 'data_class' => null))
        ->add('tags', CollectionType::class, array(
                    'entry_type' => TagType::class,
                    'allow_add'    => true,
                    'label' => false,
                    'by_reference' => false,
                   ));

和TagType.php

$builder
    ->add('name', TextType::class, array(
        'label' => false,
        'attr' => array('class' => 'form-control', 'placeholder' => 'nazwa tagu')
    ))
;

当我向数据库添加文章时，Tag列如下所示：

Doctrine\Common\Collections\ArrayCollection@0000000052786f600000000016ee1beb

表格标签为空。当我试图编辑文章时出现错误

警告：为foreach（）提供的参数无效

    $originalTags = new ArrayCollection();

    foreach ($article->getTags() as $tag) {
        $originalTags->add($tag);
    }

那么这段代码有什么问题？我已经试图找到解决方案好几天仍然没有进展

编辑表格，标签系统集合的Symfony问题

0 个答案: