Symfony序列化学说实体

时间:2016-06-28 07:38:51

标签: symfony doctrine

我有一个简单的实体类:

<?php
namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;


/**
 * @ORM\Entity(repositoryClass="CompanyUserRepository")
 * @ORM\Table(name="company_users")
 */
class CompanyUser
{
/**
 * @ORM\Column(type="integer")
 * @ORM\Id
 * @ORM\GeneratedValue(strategy="AUTO")
 */
private $id;

/**
 * @ORM\Column(type="string", length=100)
 */
private $firstName;

/**
 * @ORM\Column(type="string", length=100)
 */
private $lastName ;

/**
 * @ORM\OneToMany(targetEntity="Score", mappedBy="user")
 */
private $scores;
/**
 * Constructor
 */
public function __construct()
{
    $this->scores = new ArrayCollection();
}

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

/**
 * Set firstName
 *
 * @param string $firstName
 *
 * @return CompanyUser
 */
public function setFirstName($firstName)
{
    $this->firstName = $firstName;

    return $this;
}

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

/**
 * Set lastName
 *
 * @param string $lastName
 *
 * @return CompanyUser
 */
public function setLastName($lastName)
{
    $this->lastName = $lastName;

    return $this;
}

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

/**
 * Add score
 *
 * @param \AppBundle\Entity\Score $score
 *
 * @return CompanyUser
 */
public function addScore(\AppBundle\Entity\Score $score)
{
    $this->scores[] = $score;

    return $this;
}

/**
 * Remove score
 *
 * @param \AppBundle\Entity\Score $score
 */
public function removeScore(\AppBundle\Entity\Score $score)
{
    $this->scores->removeElement($score);
}

/**
 * Get scores
 *
 * @return \Doctrine\Common\Collections\Collection
 */
public function getScores()
{
    return $this->scores;
}

}

当我尝试获取所有用户并在json中序列化它们时出现问题:

/**
 * @Route("/api/getUsers", name="getUsers")
 */
public function getUsers(Request $request){
    $users = $this->getDoctrine()
    ->getRepository('AppBundle:CompanyUser')
    ->findAll();

    $serializer = $this->get('serializer');
    $data = $serializer->serialize($users, 'json');

    return new Response($users);
}

我得到已检测到循环引用(配置限制:1)。 当我删除getScores getter时,一切正常。我只需要获取id,firstName和lastName。有没有办法不序列化其他对象?

1 个答案:

答案 0 :(得分:5)

当序列化具有关系的实体时,使用circular references处理是很常见的事情。

解决方案没有。 1:实现可序列化接口并使关系属性不是序列化/反序列化(大多数情况下,它是一个有效的解决方案)

解决方案没有。 2:此规范化程序的setCircularReferenceLimit()方法设置在将其视为循环引用之前序列化同一对象的次数。它的默认值是1.因此,在调用serialize()方法之前,请执行以下操作:

public function getUsers(Request $request){
    $users = $this->getDoctrine()
    ->getRepository('AppBundle:CompanyUser')
    ->findAll();

    $serializer = $this->get('serializer');
    $serializer->setCircularReferenceLimit(2); // Change this with a proper value for your case
    $data = $serializer->serialize($users, 'json');

    return new Response($data);
}

****更新****

正如@Derek在评论中所说,解决方案没有。在某些版本的Symfony中,2可能无效。然后,您可以尝试以这种方式为循环引用设置处理程序:

$encoder = new JsonEncoder();
$normalizer = new ObjectNormalizer();

$normalizer->setCircularReferenceHandler(function ($object) {
   return $object->getName(); // Change this to a valid method of your object
});

$serializer = new Serializer(array($normalizer), array($encoder));
var_dump($serializer->serialize($org, 'json'));    

这应返回您的实体值,而不是迭代关系。