我想修改一个具有内容值的表单:我尝试使用"PRE_BIND"事件,但如果表单不是第一次发送的,这将不起作用。我有这个:
<?php
namespace YOUCommercantBundleFormType;
use SymfonyComponentFormAbstractType;
use SymfonyComponentFormFormEvents;
use SymfonyComponentFormFormEvent;
use SymfonyComponentFormFormBuilderInterface;
use SymfonyComponentOptionsResolverOptionsResolverInterface;
class LivraisonChoixType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->addEventListener(FormEvents::PRE_BIND, function (FormEvent $event) use ($builder)
{
$form = $event->getForm();
$data = $event->getData();
if ((int)$data['pays'] > 0) {
$form->remove('livreur');
$pays = $data['pays'];
$form->add('livreur','entity',array(
'property' =>'name',
'class' => 'YOUAdminBundle:Livreur',
'label' => 'Livreur :',
'query_builder' => function($er) use ($pays){
return $er->createQueryBuilder('c')
->join('c.pays', 'p')
->andWhere('p.id= :pays')
->addOrderBy('c.name', 'ASC')
->setParameter('pays', $pays);
},
)
);
}
});
$builder
->add('pays','pays',array('label'=>'Destination :'))
->add('livreur','entity',array(
'property' =>'name',
'class' => 'YOUAdminBundle:Livreur',
'label' => 'Livreur :',
'query_builder' => function($er) {
return $er->createQueryBuilder('c')
->join('c.pays', 'p')
->andWhere('p.id= :pays')
->addOrderBy('c.name', 'ASC')
->setParameter('pays', 0);
},
)
)
->add('prix','number',array('required'=>true,'label' => 'Frais :'))
->add('prix2','number',array('required'=>false,'label' => 'Frais en second article :'))
;
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'YOUCommercantBundleEntityLivraisonChoix',
));
}
public function getName()
{
return 'you_commercantbundle_livraisonchoixtype';
}
}
由以下表单类型调用:
<?php
namespace YOUCommercantBundleFormType;
use SymfonyComponentFormAbstractType;
use SymfonyComponentFormFormBuilderInterface;
use SymfonyComponentOptionsResolverOptionsResolverInterface;
class LivraisonType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name','text',array('required'=>true,'label'=>'Nom :'))
->add('choix','collection',array(
'type'=>new LivraisonChoixType(),
'options'=>array('attr'=>array('class'=>'livreur-collection')),
'allow_add' => true,
'allow_delete' => true,
'by_reference' => false,
))
;
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'YOUCommercantBundleEntityLivraison'
));
}
public function getName()
{
return 'you_commercantbundle_livraisontype';
}
}
有人知道我该如何获得价值吗?
这可能不是最好的答案,但当我想在表单呈现之前为其赋值时,我会这样做。基本上,我会将表单绑定到这样一个实体:
// First create entity that will bind with form
$someEntityInstance = new myEntity();
$someEntityInstance->setPropertyOne(5);
$someEntityInstance->setPropertyTwo('another value');
// Then bind entity to form
$myForm = $this->createForm(new myFormType, $someEntityInstance);
从表单映射到实体的任何属性都将具有相同的值,并且在视图中呈现时,会显示该值。尽管如此,如果我在一个表单中表示了多个实体,那么我会创建一个名为处理器的新事物类,该类将具有映射并绑定到表单的属性,该属性还可以更改表单字段值。
这是我所知道的在呈现表单字段值之前更改表单字段值的最简单方法。