rest - 在使用 FOSRestBundle 进行序列化期间检测到 Symfony 3.0.4 循环引用

Question

我在 Symfony 项目中使用 FOSRestBundle。当我尝试处理 View 时，它在使用 Symfony 序列化程序和 JMSSerializer 序列化我的数据期间失败。

这是呈现响应的方法:

DefaultController.php

$em = $this->getDoctrine()->getManager('magellan');
$qb = $em->createQueryBuilder();

$query = $qb->select('h')
        ->from('DataBundle:Holding', 'h')
        ->where($qb->expr()->eq('h.id', ':holding_id'))
        ->setParameter('holding_id', $holding_id)
        ->getQuery();

$results = $query->getResult();

$view = $this->view($results, 200);

// Everything's ok up to this point

return $this->handleview($view);

这些是我的实体:

控股.php

class Holding
{

    ...

    /**
     * @ORM\OneToMany(targetEntity="Subsidiary", mappedBy="holding")
     */
    private $subsidiaries;
}

子公司.php

class Subsidiary
{

    ...

    /**
     * @ORM\ManyToOne(targetEntity="Holding", inversedBy="subsidiaries")
     * @ORM\JoinColumn(name="id_holding", referencedColumnName="id_holding")
     */
    private $holding;

    /**
     * @ORM\OneToMany(targetEntity="Brand", mappedBy="subsidiary")
     */
    private $brands;
}

Brand.php

class Brand
{

    ...

    /**
     * @ORM\ManyToOne(targetEntity="Subsidiary", inversedBy="brands")
     * @ORM\JoinColumn(name="id_subsidiary", referencedColumnName="id_subsidiary")
     */
    private $subsidiary;

    /**
     * @ORM\OneToMany(targetEntity="Product", mappedBy="brand")
     */
    private $products;
}

产品.php

class Product
{

    ...

    /**
     * @ORM\ManyToOne(targetEntity="Brand", inversedBy="products")
     * @ORM\JoinColumn(name="id_brand", referencedColumnName="id_brand")
     */
    private $brand;

    /**
     * @ORM\ManyToOne(targetEntity="Sector", inversedBy="products")
     * @ORM\JoinColumn(name="id_sector", referencedColumnName="id_sector")
     */
    private $sector;

    /**
     * @ORM\OneToMany(targetEntity="Commercial", mappedBy="product")
     */
    private $commercials;
}

商业.php

class Commercial
{

    ...

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

    /**
     * @ORM\OneToMany(targetEntity="CommercialReport", mappedBy="commercial")
     */
    private $reports;

CommercialReport.php

class CommercialReport
{

    ...

    /**
     * @ORM\ManyToOne(targetEntity="Commercial", inversedBy="reports")
     * @ORM\JoinColumn(name="id_commercial", referencedColumnName="id_commercial")
     */
    private $commercial;
}

Sector.php

class Sector
{

    ...

    /**
     * @ORM\OneToMany(targetEntity="Product", mappedBy="sector")
     */
    private $products;
}

使用默认的 symfony 序列化程序时，出现以下错误:

"message":"A circular reference has been detected (configured limit: 1).","class":"Symfony\Component\Serializer\Exception\CircularReferenceException"

并且在使用 JMSSerializer 时，当我转到 Controller 的相应页面时，该页面永远不会完成加载。同时在 dev.log 文件中，每秒都会添加新的 Doctrine.debug 条目，其中包含对我的数据库的请求。

Answer 1

    $normalizers->setCircularReferenceHandler(function ($object) {
        return $object->getId();
    });

如果您的 objectNormalizer() 在创建实例后添加它
它对我来说非常完美