Forms symfony2类中既不存在属性也不存在方法

点击按钮的一条路线适用于此控制器：

public function addAction(Request $request){
        $em = $this->getDoctrine()->getManager();
        $spotEntity = $this->getCurrentSpot();
        $permitsidrand = rand(0, 1000000000000);
        $currentDate = new DateTime();
        $permitsrepo = new Permits();


        $permitsrepo->setCreatedat($currentDate);
        $permitsrepo->setPermitid($permitsidrand);
        $permitsrepo->setPermitsSpot($spotEntity);
        $em->persist($permitsrepo);
        $em->flush();

        return $this->redirect($this->generateUrl('permits_add', array('id' => $permitsrepo->getId())));
    }

所以我想创建一个新对象，并用几个变量填充它，然后我想用表单重定向到屏幕，表单将从我刚刚添加的数据库更新我的记录

这是第二个功能（我在点击按钮后重定向到的功能）

当我点击该按钮时，我会收到以下错误信息：

Neither property "PermitsContractor" nor method "getPermitsContractor()" nor method "isPermitsContractor()" exists in class "Main\CoreBundle\Entity\PermitsRepository" 

这是我的表格

 public function buildForm(FormBuilderInterface $builder, array $options) {

        $builder->add('PermitsContractor', 'entity', array(
            'class' => 'MainCoreBundle:Generalcontractor',
            'multiple' => false,
            'expanded' => false,
            'property'=>'name',
            'label'=> 'Generalny wykonawca',
        ));


        $builder->add('PermitsCompany', 'entity', array(
            'class' => 'MainCoreBundle:Company',
            'multiple' => false,
            'expanded' => false,
            'property'=>'name',
            'label'=> 'Firma',
        ));

        $builder->add('Permitname', 'text',array('label'=> "Imię", 'required'=>false));
        $builder->add('Permitsurname', 'text',array('label'=> "Nazwisko", 'required'=>false));

        $builder->add('expirationdate', 'date', array(
            'widget' => 'single_text',
            'label'=> 'Data ważności',
        ));


        $builder->add('file', 'file', array('required'=>false, 'label'=>'Przeglądaj'));
    }

    public function getName() {
        return 'main_admin_permits_type';
    }

---

我签出了实体中的getter和setter，错误在这里

    $perm = $permitsrepo->find($id);
    $permitsrepo->setCreatedat($currentDate);
    $permitsrepo->setPermitid($permitsidrand);
    $permitsrepo->setPermitsSpot($spotEntity);

使用

    $perm = $permitsrepo->find($id);
    $permitsrepo->setCreatedat($currentDate);
    $permitsrepo->setPermitid($permitsidrand);
    $permitsrepo->setPermitsSpot($spotEntity);

    $perm = $permitsrepo->find($id);
    $perm->setCreatedat($currentDate);
    $perm->setPermitid($permitsidrand);
    $perm->setPermitsSpot($spotEntity);