正确使用FormEvents定制SonataAdmin中的字段的方法

时间:2014-10-07 22:16:26

标签: forms symfony sonata-admin

我有一个包含一些表单字段的Sonata Admin类,但我想使用FormEvents::PRE_SET_DATA事件根据绑定数据动态添加另一个表单字段。

但是,我遇到了几个问题:

1)我能找到将表单字段添加到正确的' formGroup'的唯一方法。管理员是通过两次添加新字段(一次通过formMapper,一次通过表单本身)...这似乎非常错误,我无法控制它在formGroup中的位置。

2)添加的元素似乎并不知道它有一个连接的Admin(可能是因为它是使用Form::add()添加的)。这意味着,除了其他方面,它呈现的形式与表单中的其他字段不同,因为它触发了{% if sonata_admin is not defined or not sonata_admin_enabled or not sonata_admin.field_description %}

中的form_admin_fields.html.twig条件

所以,这让我相信我做错了,必须有更好的方法。

因此...

使用SonataAdmin时,使用FormEvent向表单组添加字段的理想方法是什么,理想情况是在该组中的首选位置?

这里有一些代码,FWIW ......

protected function configureFormFields(FormMapper $formMapper)
{
    $admin = $this;
    $formMapper->getFormBuilder()->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) use ($admin, $formMapper) {
        $subject = $event->getData();

        // do something fancy with $subject
        $formOptions = array(/* some cool stuff*/);

        // If I don't add the field with the $formMapper then the new field doesn't appear on the rendered form
        $formMapper
            ->with('MyFormGroup')
                ->add('foo', null, $formOptions)
            ->end()
        ;

        // If I don't add the field with Form::add() then I get a Twig Exception: 
        // Key "foo" for array with keys "..." does not exist in my_form_template.html.twig at line xx
        $event
            ->getForm()
            ->add('foo', null, $formOptions)
        ;
    });

    $formMapper
        ->with('MyFormGroup')
            ->add('fieldOne')
            ->add('fieldTwo')
        ->end()
    ;
}

目的是在foo中的fieldOnefieldTwo之间添加新的MyFormGroup字段。


编辑:这是我在Cassiano的回答中提出的答案

protected function configureFormFields(FormMapper $formMapper)
{
    $builder = $formMapper->getFormBuilder();
    $ff = $builder->getFormFactory();
    $admin = $this;
    $formMapper->getFormBuilder()->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) use ($ff, $admin) {
        $subject = $event->getData();

        // do something fancy with $subject
        $formOptions = array(
            'auto_initialize'       => false,
            'class'                 => 'My\ProjectBundle\Entity\MyEntity',
            /* some cool stuff*/
        );

        $event->getForm()->add($ff->createNamed('foo', 'entity', null, $formOptions));
    });

    $formMapper
        ->with('MyFormGroup')
            ->add('fieldOne')
            ->add('foo')  // adding it here gets the field in the right place, it's then redefined by the event code
            ->add('fieldTwo')
        ->end()
    ;
}

1 个答案:

答案 0 :(得分:3)

我没时间回答很长的答案,我会粘贴一段代码,而且我不知道是否完全适合你的情况,在我的多重依赖选择(国家,州,城市,邻居)。

use Symfony\Component\Form\FormEvents;
use Symfony\Component\Form\FormEvent;
use Doctrine\ORM\EntityRepository;

protected function configureFormFields(FormMapper $formMapper)
{
    $formMapper->add('myfield');

    $builder = $formMapper->getFormBuilder();
    $ff = $builder->getFormFactory();
    $func = function (FormEvent $e) use ($ff) {
        $form = $e->getForm();
        if ($form->has('myfield')) {
            $form->remove('myfield');
        }
        $form->add($ff->createNamed('myfield', 'entity', null, array(
            'class' => '...',
            'attr' => array('class' => 'form-control'),
            'auto_initialize' => false,
            'query_builder' => function (EntityRepository $repository) use ($pais) {
                $qb = $repository->createQueryBuilder('estado');
                if ($pais instanceof ...) {
                    $qb = $qb->where('myfield.other = :other')
                            ->setParameter('other', $other);
                } elseif(is_numeric($other)) {
                    $qb = $qb->where('myfield.other = :other_id')
                            ->setParameter('other_id', $other);
                }
                return $qb;
            }
        )));
    };
    $builder->addEventListener(FormEvents::PRE_SET_DATA, $func);
    $builder->addEventListener(FormEvents::PRE_BIND, $func);
}