Question

我遇到了与Doctrine 2 x Symfony 3的ManyToOne - OneToMany关系的问题。

我创建了2个实体（让他们将它们命名为IPAddress和VPS），一个VPS可以拥有多个ips，许多ips可以属于VPS

我的IPAddress实体：

class IPAddress
{
    ....
    /**
     * Many IPs have one server
     *
     * @ORM\ManyToOne(targetEntity="VPS", inversedBy="ips")
     */
    protected $server;

    /**
     * @return mixed
     */
    public function getServer()
    {
        return $this->server;
    }

    /**
     * @param mixed $server
     */
    public function setServer($server)
    {
        $this->server = $server;
    }
    ....
}

我的VPS实体：

Class VPS
{
    ....
    /**
     * One server have many IPs
     *
     * @ORM\OneToMany(targetEntity="IPAddress", cascade={"persist", "remove"}, mappedBy="server")
     */
    protected $ips;

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

    /**
     * @return mixed
     */
    public function getIps()
    {
        return $this->ips;
    }

    /**
     * @param mixed $ips
     */
    public function addIps(IPAddress $IPAddress)
    {
        $this->ips->add($IPAddress);
        $IPAddress->setServer($this);
    }
    ....
}

当我尝试通过我的VPS获取IP时：

$em = $this->getDoctrine()->getManager();

$serverRepo = $em->getRepository('AppBundle:VPS');
$server = $serverRepo->find(4);

$server->getIps();
//From there, there is no way to get my IPs, I only have a very big object without my IPs informations, only my columns' names marked as "null"

愿有人有任何想法，可以帮我解决这个问题吗？我从一天开始搜索，无法找到我做错的事情。

提前致谢！：）

Answer 1

查看此处的示例。 http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/association-mapping.html#one-to-many-bidirectional

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1 个答案: