Question

我在最新版本中使用Symfony 2.7和Doctrine。我尝试了他们的多对一双向示例：

http://doctrine-orm.readthedocs.org/en/latest/reference/association-mapping.html#one-to-many-bidirectional

现在我可以使用我的控制器添加产品，但它不会更新我的功能。

以下是产品实体的代码：

<?php

namespace AppBundle\Entity;

use Doctrine\Common\Collections\ArrayCollection;

use Doctrine\ORM\Mapping as ORM;

/** @ORM\Entity
 *
 * @ORM\Table(name="product")
 *
 */
class Product
{
    /**
     * @ORM\Column(type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @ORM\OneToMany(targetEntity="Feature", mappedBy="product")
     **/
    private $features;


    public function __construct() {
        $this->features = new ArrayCollection();
    }

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

    public function addFeature(Feature $feature)
    {
        return $this->features[] = $feature;
    }

    public function getFeatures()
    {
        return $this->features;
    }

}

以及要素实体的代码：

<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;


/** @ORM\Entity
 *
 * @ORM\Table(name="feature")
 *
 */
class Feature
{
    /**
     * @ORM\Column(type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @ORM\ManyToOne(targetEntity="Product", inversedBy="features")
     * @ORM\JoinColumn(name="product_id", referencedColumnName="id")
     **/
    private $product;

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

    public function getProduct()
    {
        return $this->product;
    }

    public function setProduct($product)
    {
        $this->product = $product;
    }

}

在我的控制器中，我只需创建一个新产品和一项新功能，并将该功能添加到我的产品实体中：

<?php

namespace AppBundle\Controller;

use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;

use AppBundle\Entity\Product;
use AppBundle\Entity\Feature;
use Symfony\Component\HttpFoundation\Response;

class DefaultController extends Controller
{
    /**
     * @Route("/")
     */
    public function indexAction(Request $request)
    {
        $em = $this->getDoctrine()->getManager();

        $feature = new Feature();
        $product = new Product();

        $product->addFeature($feature);

        $em->persist($feature);
        $em->persist($product);
        $em->flush();

        return new Response('Created product id '.$product->getId());
    }

}

我只获得了新产品和新功能。该功能无法获得与产品的关系（数据库中的product_id字段包含“NULL”）。

Answer 1

尝试将addFeature类的Product方法更改为

public function addFeature(Feature $feature)
{
    return $this->features->add($feature->setProduct($this));
}

并将setProduct类的Feature方法更改为

public function setProduct($product)
{
    $this->product = $product;

    // For chaining
    return $this;
}

如果这些更改无法解决您的问题，请尝试将$features属性注释更改为

/**
 * @ORM\OneToMany(targetEntity="Feature", mappedBy="product", cascade={"persist", "remove"})
 **/
private $features;

cascade选项告诉Doctrine自动管理子实体。

PHP Doctrine多对一双向映射

1 个答案: