symfony2：尝试在模板中呈现表单

Question

我正在尝试渲染一个我刚从实体生成的表单，但我收到了以下错误...

<?php

namespace Prueba\FrontendBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
use Prueba\FrontendBundle\Form\ItemType;

class DefaultController extends Controller
{
/**
* @Route("/hello")
* @Template()          
*/                      
public function indexAction($name)       
{                              
     $form = new ItemType();var_dump(get_class($form));                                 
                return $this->render('AcmeTaskBundle:Default:new.html.twig', array(             
                                        'form' => $form->createView(),
                                                 ));
    }                            
}

  

string（35）“Prueba \ FrontendBundle \ Form \ ItemType”致命错误：致电   未定义的方法Prueba \ FrontendBundle \ Form \ ItemType :: createView（）in   /home/javier/programacion/sf2000/src/Prueba/FrontendBundle/Controller/DefaultController.php   第20行

Answer 1

更改

$form = new ItemType();

到

$form = $this->createForm(new FormType());

如果你想在表单中附加一个空实体（更容易验证和表单处理）：

$item = new Item();
$form = $this->createForm(new FormType(), $item);