Symfony2中隐藏的实体字段类型

Question

我想在控制器中为我的外键实体创建一个隐藏值.

我以前的控制器是这样的(工作正常):

->add('id_grup', 'entity', array('class' => 'Sifo\AdminBundle\Entity\MstGrup'))

我想为我的表单分配一个隐藏值,如下所示:

->add('id_grup', 'hidden', array('data' => $id))

但它给了我一个错误:

ContextErrorException:Catchable Fatal Error:传递给Sifo\AdminBundle\Entity\DftGrupMapel :: setIdGrup()的参数1必须是Sifo\AdminBundle\Entity\MstGrup的实例,给定字符串,在C:\ Sifony\vendor\symfony\symfony中调用第360行的\ src\Symfony\Component\PropertyAccess\PropertyAccessor.php,在C:\ Sifony\src\Sifo\AdminBundle\Entity\DftGrupMapel.php第179行中定义

如何为隐藏的外键实体赋值？非常感谢你.

Answer 1

终于成功了！我需要在创建表单之前定义实体默认值，并且不要在 FormBuilder 中再次添加：

public function manageAction(Request $request, $id)
{
    $em = $this->getDoctrine()->getManager();
$entity = $em->getRepository('SifoAdminBundle:MstGrup')->find($id);

if (!$entity) {
    throw $this->createNotFoundException('Unable to find MstGrup entity.');
}  

$entity_new = new DftGrupMapel();
$entity_new->setIdGrup($entity);
$new_form    = $this->createFormBuilder($entity_new)
    ->setAction($this->generateUrl('admin_grup_mapel_manage', array('id' => $id)))
    ->setMethod('POST')
->getForm();

$new_form->handleRequest($request);

if ($new_form->isValid()) {
    $em_new = $this->getDoctrine()->getManager();
    $em_new->persist($entity_new);
    $em_new->flush();

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

return $this->render('SifoAdminBundle:DftGrupMapel:manage.html.twig', array(
    'entity'      => $entity, 
    'new_form'   => $new_form->createView(),            
));
}