錯誤FormType Symfony

Question

我只會顯示與住所相關的用戶，這裏是我的錯誤。

值爲「username」的選項「options」預期爲類型「null」或「array」或「\ Traversable」，但類型爲「string」。

我FormType：

<?php 

namespace AppBundle\Form; 

use AppBundle\Entity\User; 
use Symfony\Bridge\Doctrine\Form\Type\EntityType; 
use Symfony\Component\Form\AbstractType; 
use Symfony\Component\Form\Extension\Core\Type\ChoiceType; 
use Symfony\Component\Form\FormBuilderInterface; 
use Symfony\Component\OptionsResolver\OptionsResolver; 

class BadgeType extends AbstractType 
{ 
    /** 
    * @var bool $admin 
    */ 
    private $admin; 

    /** 
    * @var User $user 
    */ 
    private $user; 

    /** 
    * DemandeType constructor. 
    * @param bool|false $admin 
    */ 
    public function __construct($admin = false, $user) 
    { 
     $this->admin = $admin; 
     $this->user = $user; 
    } 

    /** 
    * {@inheritdoc} 
    */ 
    public function buildForm(FormBuilderInterface $builder, array $options) 
    { 
     $residences = $this->user->getResidences(); 

     $builder 
      ->add('tag') 
      ->add('typeBadge', ChoiceType::class, array(
       'choices' => array(
        'Parking' => 'Parking', 
        'SAS' => 'SAS' 
       ) 
      )) 
      ->add('dateCreate') 
      ->add('active'); 
      if ($this->admin){ 
       $builder->add('user', EntityType::class, array(
        'class' => 'AppBundle\Entity\User', 
        'multiple' => false, 
        'required' => true 
       )); 
      } else { 
       $builder->add('user', EntityType::class, array(
        'class' => 'AppBundle\Entity\User', 
        'choices' => 'username' 
       )); 
      }; 

      if ($this->admin) { 
       $builder->add('residence', 'entity', array(
        'label' => 'Residence', 
        'property' => 'name', 
        'multiple' => true, 
        'required' => true, 
        'expanded' => false, 
        'class' => 'AppBundle\Entity\Residence' 
       )); 
      } else { 
       $builder->add('residence', EntityType::class, array(
        'class' => 'AppBundle:Residence', 
        'label' => 'Residence', 
        'property' => 'name', 
        'multiple' => true, 
        'required' => true, 
        'expanded' => false, 
        'choices' => $residences, 
       )); 
      }; 
    } 

    /** 
    * {@inheritdoc} 
    */ 
    public function configureOptions(OptionsResolver $resolver) 
    { 
     $resolver->setDefaults(array(
      'data_class' => 'AppBundle\Entity\Badge' 
     )); 
    } 

    /** 
    * {@inheritdoc} 
    */ 
    public function getBlockPrefix() 
    { 
     return 'appbundle_badge'; 
    } 

謝謝。

Answer 1

錯誤是自我解釋。以下選項無效。

'choices' => 'username' 

choices選項定義<select>設置的可能選項。

我想你想使用username字段的User實體作爲選擇標籤。爲此，請將此行更改爲：

'choice_label' => 'username'