嵌入表单的集合空结果

如何解决嵌入表单的集合空结果

我在这里回答问题： One form with all row of one entity

我的文件是：

PermissionCollectionType：

class PermissionsCollectionType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder,array $options)
    {
        $builder
            ->add('permissions',CollectionType::class,[
                'entry_type' => PermissionsContentsType::class,])
        ;
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => null
        ));
    }
}

PermissionsContentsType：

class PermissionsContentsType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder,array $options)
    {
        $builder
            ->add('name',TextType::class,[
                'label' => 'Name','attr' => [
                    'placeholder' => 'Name'
                ]
            ])
            ->add('view',CheckboxType::class,[
                'mapped' => false,'required' => false,'label' => false
            ])
            ->add('new','label' => false
            ])
            ->add('edit','label' => false
            ])
            ->add('delete','label' => false
            ])
            ->add('accept','label' => false
            ])
        ;
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'data_class' => Categories::class
        ]);
    }
}

控制器：

public function permissionsAction(Request $request,EntityManagerInterface $em,$role,$type,UserInterface $user)
{
    $categoriesRepository = $em->getRepository('App:Categories');
    $list = $categoriesRepository->findAll();

    $form = $this->createForm(PermissionsCollectionType::class,$list);

    $form->handleRequest($request);

    return $this->render('Acl\permissionForm.html.twig',[
        'list' => $list,'form' => $form->createView(),]);
}

嫩枝：

{% extends 'base.html.twig' %}

{% block body %}

{{ form(form) }}

{% endblock %}

不幸的是，该表单仅显示单词'Permissions'，仅此而已，就像列表不存在一样。可能是什么问题或如何解决？

解决方法

您的PermissionCollectionType将调查您的$list数组以找到permissions键，该键不存在。要解决此问题，请尝试在将密钥提供给表单之前进行设置（就像在链接的问题+答案中所做的那样）：

//...
$list = array('permissions' => $list);
$form = $this->createForm(PermissionsCollectionType::class,$list);
//...