3

我定义了这个实体:

namespace CategoryBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Gedmo\Mapping\Annotation as Gedmo;

/**
 * @ORM\Entity
 * @ORM\Table(name="category")
 */
class Category {

    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     * 
     */
    protected $id;

    /**
     *
     * @ORM\Column(type="string", length=255, nullable=false)
     */
    protected $name;

    /**
     *
     * @ORM\Column(type="integer", nullable=true)
     */
    protected $parent;

    /**
     *
     * @ORM\Column(type="string", length=255, nullable=true)
     */
    protected $description;

    /**
     *
     * @ORM\Column(type="integer")
     */
    protected $age_limit;

    /**
     * @Gedmo\Timestampable(on="create")
     * @ORM\Column(name="created", type="datetime")
     */
    protected $created;

    /**
     * @Gedmo\Timestampable(on="update")
     * @ORM\Column(name="modified", type="datetime")
     */
    protected $modified;

    public function getId() {
        return $this->id;
    }

    public function setParent(Category $parent = null) {
        $this->parent = $parent;
    }

    public function getParent() {
        return $this->parent;
    }

    public function setName($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }

    public function setDescription($description) {
        $this->description = $description;
    }

    public function getDescription() {
        return $this->description;
    }

    public function setAgeLimit($age_limit) {
        $this->age_limit = $age_limit;
    }

    public function getAgeLimit() {
        return $this->age_limit;
    }

    public function setCreated($created) {
        $this->created = $created;
    }

    public function getCreated() {
        return $this->created;
    }

    public function setModified($modified) {
        $this->modified = $modified;
    }

    public function getModified() {
        return $this->modified;
    }
}

然后我在我的控制器中有这个方法来处理表单提交:

/**
 * Handle category creation
 *
 * @Route("/category/create", name="category_create")
 * @Method("POST")
 * @Template("CategoryBundle:Default:new.html.twig")
 */
public function createAction(Request $request) {
    $entity = new Category();
    $form = $this->createForm(new CategoryType(), $entity);
    $form->handleRequest($request);

    if ($form->isValid()) {
        $em = $this->getDoctrine()->getManager();
        $em->persist($entity);
        $em->flush();

        return $this->redirect($this->generateUrl('category_list'));
    }

    return $this->render('CategoryBundle:Default:new.html.twig', array(
                'entity' => $entity,
                'form' => $form->createView(),
    ));
}

最后这是我的CategoryType.php

public function buildForm(FormBuilderInterface $builder, array $options) {
    $builder
            ->add('parent', 'entity', array('class' => 'CategoryBundle:Category', 'property' => 'name', 'required' => false))
            ->add('name')
            ->add('description')
            ->add('age_limit');
}

当我尝试保存数据时,出现此错误:

执行带有参数 ["Cat2", {}, null, 2 , "2013-08-06 09:58:03", "2013-08-06 09:58:03"]:

可捕获的致命错误:CategoryBundle\Entity\Category 类的对象无法转换为 /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Statement.php 第 138 行中的字符串

我做错了什么?如何在我的方法中访问该属性以便保存该值?

更新

根据@sybio 提出的建议,我重写了我的实体,所以现在我有了这个:

/**
 * @ManyToOne(targetEntity="Category")
 * @JoinColumn(name="parent", referencedColumnName="id")
 */
protected $parent;

那正确吗?

4

1 回答 1

5

这是我的想法:

您正在尝试将 Category 对象保存为父对象,但在以下代码中:

/**
 *
 * @ORM\Column(type="integer", nullable=true)
 */
protected $parent;

你说父类是一个整数,所以框架尝试将父类保存为整数,但为了适应它,它可能之前将对象转换为字符串,所以它崩溃了......

我不完全确定,但你应该重新考虑你的财产“$parent”。

它应该是一个自引用关系

例子 :

/**
 * @OneToMany(targetEntity="Category", mappedBy="parent")
 */
private $children;

/**
 * @ManyToOne(targetEntity="Category", inversedBy="children")
 * @JoinColumn(name="parent_id", referencedColumnName="id")
 */
protected $parent;

public function __construct() {
    $this->children = new \Doctrine\Common\Collections\ArrayCollection();
}

不要忘记重构你的 getter / setter :

    /**
     * Set parent
     *
     * @param \CategoryBundle\Entity\Category $parent
     */
    public function setParent(\CategoryBundle\Entity\Category $parent = null)
    {
        $this->parent = $parent;
    }

    /**
     * Get parent
     *
     * @return \CategoryBundle\Entity\Category 
     */
    public function getParent()
    {
        return $this->parent;
    }

希望这是解决方案!

于 2013-08-06T19:07:37.973 回答