如何僅在表單是新的時候才需要填寫字段？

Question

我有以下buildForm方法：

public function buildForm(FormBuilderInterface $builder, array $options) 
{ 
    $builder       
     ->add('firstname','text',array('label'=>'First Name')) 
     ->add('lastname','text',array('label'=>'Last Name')) 
     ->add('dob','date',array('widget'=>'single_text','label'=>'DOB')) 
     ->add('username','text',array('label'=>'Username')) 
     ->add('password','password',array('label'=>'Password')) 
     ->add('filesPassword','password',array('label'=>'My Files Password','required'=>false)) 
     ->add('email','email',array('label'=>'Email')) 
     ->add('language','entity',array('class'=>'GWD\AdminBundle\Entity\Languages','label'=>'Language')) 
     ->add('theme','entity',array('class'=>'GWD\AdminBundle\Entity\Themes','label'=>'Theme')) 
     ->add('roles','entity',array('class'=>'GWD\AdminBundle\Entity\Role','label'=>'Role')) 
    ; 
} 

如何動態設置密碼字段只在創建一個新的記錄被要求，並設置非更新記錄時，需要？

Answer 1

下面的代碼對我的作品只有一個警告，密碼字段被在表格末尾添加，而不是在爲了我想要它，即使我認爲通過添加事件，我希望該字段出現在內，它會做到這一點，但事實並非如此。

<?php 

namespace GWD\AdminBundle\Form; 

use Symfony\Component\Form\AbstractType; 
use Symfony\Component\Form\FormBuilderInterface; 
use Symfony\Component\OptionsResolver\OptionsResolverInterface; 
use Symfony\Component\Form\FormEvents; 
use Symfony\Component\Form\FormEvent; 

class AdministratorsType extends AbstractType 
{ 

    public function buildForm(FormBuilderInterface $builder, array $options) 
    { 
     $builder       
      ->add('firstname','text',array('label'=>'First Name')) 
      ->add('lastname','text',array('label'=>'Last Name')) 
      ->add('dob','date',array('widget'=>'single_text','label'=>'DOB')) 
      ->add('username','text',array('label'=>'Username')); 

     $builder->addEventListener(FormEvents::PRE_SET_DATA, 
      function(FormEvent $event) use ($builder) { 
       $administrator = $event->getData(); 
       if (!$administrator || null === $administrator->getId()) { 
        $event->getForm()->add('password','password',array('label'=>'Password','required'=>true)); 
       } else { 
        $event->getForm()->add('password','password',array('label'=>'Password','required'=>false)); 

       } 
      } 
     ); 

     $builder 
      ->add('filesPassword','password',array('label'=>'My Files Password','required'=>false)) 
      ->add('email','email',array('label'=>'Email')) 
      ->add('language','entity',array('class'=>'GWD\AdminBundle\Entity\Languages','label'=>'Language')) 
      ->add('theme','entity',array('class'=>'GWD\AdminBundle\Entity\Themes','label'=>'Theme')) 
      ->add('roles','entity',array('class'=>'GWD\AdminBundle\Entity\Role','label'=>'Role')) 
     ; 

    } 


    public function setDefaultOptions(OptionsResolverInterface $resolver) 
    { 
     $resolver->setDefaults(array(
      'data_class' => 'GWD\AdminBundle\Entity\Administrators' 
     )); 
    } 


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

Answer 2

您可以添加另一個變種到您的陣列中，可以定義標籤：

->add('firstname','text',array('label'=>'First Name', 'required' => false)) 

Answer 3

你可以試試下面的代碼：

$builder 
    ->add('password','password', 
     array(
       'label' => 'Password', 
       'required' => is_null($builder->getData()->getId()) 
      ) 
     )