Symfony 对非对象（实际上是对象）调用成员函数xx（）

ValidateGatherType.php

namespace D2E\CoreBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilder;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;

class ValidateGatherType extends AbstractType
{
    private $gather;

    public function __construct(Gather $gather) 
    {
        $this->gather = $gather;
    }

    public function buildForm(FormBuilder $builder, array $options)
    {
        $gather_players = $gather->getGatherPlayers();
    }

}

GatherController.php

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
class GatherController extends Controller
{

/**
 * @Route("/teams/{id_team}/gather/{id_gather}")
 * @Template()
 */
public function showAction(Team $team, Gather $gather) 
{
    new ValidateGatherType($gather);
}

执行此$gather->getGatherPlayers（）时出错：

Soooooo，wtf（它被强制为聚集，但它不再是对象？）？我想我忘了用什么了，但我找不到什么了。 控制器代码是不同的，但由于这一行不起作用（即使我像我展示给你的那样使用它），我没有把其余的代码放进去

谢谢你的帮助

public function buildForm(FormBuilder $builder, array $options)
{
    $gather_players = $gather->getGatherPlayers();
}

此处未定义局部变量

$gather

。您可能指的是实例属性

$this->gather

public function buildForm(FormBuilder $builder, array $options)
{
    $gather_players = $gather->getGatherPlayers();
}