Question

我正在构建Symfony3项目。我正在使用JMS进行序列化。我有与Group具有ManyToMany关系的User实体。我正在尝试向Group个对象添加其他数据。我正在使用序列化监听器来实现这一点。例如，我想让那个与当前用户一起去同一所学校的小组成员。我setData将对象分组如下：

class SerializationListener{

    //Constructor
    /**
     * @param ObjectEvent $event
     */
    public function onGroupEntitySerialize(ObjectEvent $event)
    {
        if (!$this->currentUser) {
            return;
        }

        /** @var GenericSerializationVisitor $visitor */
        $visitor = $event->getVisitor();

        $group = $event->getObject();

        $groupMembersFromUserSchool = $this->em->getRepository('AppBundle:User')
        ->groupMembersFromUserSchool($group, $this->currentUser);

        $visitor->setData('members', $groupMembersFromUserSchool);

        $groupMembersCountFromUserSchool = count($groupMembersFromUserSchool);

        $visitor->setData('memberCount', $groupMembersCountFromUserSchool);
    }
}

然而，我得到了这个结果：

 {
"items": [
    {
        "memberCount": 17,
        "id": 1,
        "name": "TestGroup1",
        "members": [
            {},
            {},
            {},
            {},
            {},
            {},
            {},
            {},
            {},
            {},
            {},
            {},
            {},
            {},
            {},
            {},
            {}
        ]
    }
   ]
  }

因此隐藏了members属性中的用户详细信息。我该如何显示它们？

  class Group{

        /**
         * @Expose()
         * @Groups({"group-details", "group-list"})
         */
         protected $members;
  }

  class User{
        /**
         * @Expose()
         * @Groups({"group-details", "group-list"})
         */
         private $id;

        /**
         * @Expose()
         * @Groups({"group-details", "group-list"})
         */
         protected $name;
  }

Answer 1

参考source code here的文档，您只能添加integer|float|boolean|string|array值：

/**
 * Allows you to add additional data to the current object/root element.
 * @deprecated use setData instead
 * @param string $key
 * @param integer|float|boolean|string|array|null $value This value must either be a regular scalar, or an array.
 *                                                       It must not contain any objects anymore.
 */
public function addData($key, $value)
{
    if (isset($this->data[$key])) {
        throw new InvalidArgumentException(sprintf('There is already data for "%s".', $key));
    }

所以尝试类似：

    $arrayValuesOfMembers = // some data as array probably extracted by the repo methods
    $visitor->setData('members', $arrayValuesOfMembers);

希望这个帮助

JMS序列化侦听器：添加的对象为空

1 个答案: