Question

对于Symfony来说是非常新的，也是我学习的方式。我只是苦苦挣扎如下：

在我的控制器类中，我想在提交后更新一些输入字段。函数代码'indexAction'类似于以下内容：

public function indexAction (Request $request) {
$myentity = new TestEntity();
$myentity->setField1 ('value1');
$form = $this->createForm (TaskType::class,$myentity);
$form->handleRequest ($request);
if ($form->isValid())
  return $this->redirectToRoute ('nextPage');
else
  {
  // and here is my problem. I would like to set Field1 to 'value2',
  // but I cannot, as the form is already submitted. Or with the
  // following command directly setting the entity, the change is not
  // taken into account anymore.
  $myentity->setField1 ('value2');
  }
return $this->render ('test.html.twig', array (
  'form' => $form->createView());
}

Field1是一个输入字段，如果第一次调用表单，我想将其设置为value1。一旦我按下“提交”按钮（并且表单无效），应显示相同的表单，但之后将Field1设置为value2。

无法弄清楚，关于如何实现上述目标。任何帮助赞赏。非常感谢，钨

Answer 1

在表单TaskType.php

中添加以下内容

public function buildForm(FormBuilderInterface $builder, array $options){
    //YOUR CODE
    $builder->addEventListener(FormEvents::POST_SUBMIT, 
         function (FormEvent $event) { 
           if(!$event->getForm()->isValid()){
             $event->getForm()->get('field1')->setData('value1'); 
           }
         });

Answer 2

<?php
namespace AppBundle\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormEvents;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\OptionsResolver\OptionsResolver;

class TaskType extends AbstractType
{
    public function buildForm (FormBuilderInterface $builder, array $options)
    {
        $builder
          ->add ('field1', TextType::class)
          ->add ('field2', TextType::class)
          ->add ('field3', TextType::class);
    }

    public function configureOptions (OptionsResolver $resolver)
    {
        $resolver->setDefaults (array (
          'data_class' => 'AppBundle\Entity\Task'
        ));
    }
}

Symfony：提交表单后更新表单字段

2 个答案: