我正在使用事件侦听器来动态修改表单。我想向第二个字段添加另一个事件侦听器。我试过这段代码，但没有用：
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('Marque', EntityType::class, array(
'class' => 'EK\PlateformeBundle\Entity\Marque',
'placeholder' => '-- Choississez une marque --',
//'mapped' => false
))
->add('Modele', EntityType::class, array(
'class' => 'EK\PlateformeBundle\Entity\Modele',
'placeholder' => '-- Choississez un modèle --',
//'mapped' => false
))
->add('nom', EntityType::class, array(
'class' => 'EK\PlateformeBundle\Entity\Type',
'placeholder' => '-- Choississez une type --',
//'mapped' => false
))
;
$formModifierM = function (FormInterface $form, Marque $marque = null) {
$modeles = null === $marque ? array() : $marque->getAvailableModeles(); // only in a bidirectional relationship
$placeholder = empty($modeles) ? '-- Choississez un modèle --' : '';
$form->add('Modele', EntityType::class, array(
'class' => 'EK\PlateformeBundle\Entity\Modele',
'placeholder' => $placeholder,
'choices' => $modeles,
))
->add('Rechercher', SubmitType::class) ;
};
$formModifierModele = function (FormInterface $form, Modele $modele = null) {
$types = null === $modele ? array() : $modele->getAvailableTypes(); // only in a bidirectional relationship
$placeholder = empty($types) ? '-- Choississez un type --' : '';
$form->add('nom', EntityType::class, array(
'class' => 'EK\PlateformeBundle\Entity\Type',
'placeholder' => $placeholder,
'choices' => $types,
))
->add('Rechercher', SubmitType::class) ;
};
$builder->addEventListener(
FormEvents::PRE_SET_DATA,
function(FormEvent $event) use ($formModifierM ,$formModifierModele){
$form = $event->getForm();
$formModifierM($form, null);
$formModifierModele($form, null);
}
);
$builder->get('Marque')->addEventListener(
FormEvents::POST_SUBMIT,
function(FormEvent $event) use ($formModifierM) {
$form = $event->getForm()->getParent();
$marque = $event->getForm()->getData();
// since we've added the listener to the child, we'll have to pass on
// the parent to the callback functions!
$formModifierM($form, $marque);
}
);
$builder->get('Modele')->addEventListener( // this code did'nt work
FormEvents::POST_SUBMIT,
function(FormEvent $event) use ($formModifierModele) {
$form = $event->getForm()->getParent();
$modele = $event->getForm()->getData();
$formModifierModele($form, $modele);
}
);
}
我没有找到任何解决此问题的方法。请任何人都可以帮助我。我发现了同样的问题，但它对我不起作用How to add an Event Listener to a dynamic added field using Symfony Forms。
我解决了我的问题。这是我的工作代码：POST_SUBMIT必须替换为PRE_SUBMIT
public function buildForm(FormBuilderInterface $builder, array $options)
{
/** @var \Doctrine\ORM\EntityManager $em */
$em = $options['entity_manager'];
$builder
->add('Marque', EntityType::class, array(
'class' => 'EK\PlateformeBundle\Entity\Marque',
'placeholder' => '-- Choississez une marque --',
'required' => false,
//'mapped' => false
))
->add('Modele', EntityType::class, array(
'class' => 'EK\PlateformeBundle\Entity\Modele',
'placeholder' => '-- Choississez un modèle --',
'required' => false,
//'mapped' => false
))
->add('nom', EntityType::class, array(
'class' => 'EK\PlateformeBundle\Entity\Type',
'placeholder' => '-- Choississez une type --',
'required' => false,
//'mapped' => false
))
;
$formModifierM = function (FormInterface $form, Marque $marque = null) {
$modeles = null === $marque ? array() : $marque->getAvailableModeles(); // only in a bidirectional relationship
$placeholder = empty($modeles) ? '-- Choississez un modèle --' : '';
$form->add('Modele', EntityType::class, array(
'class' => 'EK\PlateformeBundle\Entity\Modele',
'placeholder' => $placeholder,
'required' => false,
'choices' => $modeles,
))
->add('Rechercher', SubmitType::class) ;
};
$formModifierModele = function (FormInterface $form, Modele $modele = null) {
$types = null === $modele ? array() : $modele->getAvailableTypes(); // only in a bidirectional relationship
$placeholder = empty($types) ? '-- Choississez un type --' : '';
$form->add('nom', EntityType::class, array(
'class' => 'EK\PlateformeBundle\Entity\Type',
'placeholder' => $placeholder,
'required' => false,
'choices' => $types,
))
->add('Rechercher', SubmitType::class) ;
};
$builder->addEventListener(
FormEvents::PRE_SET_DATA,
function(FormEvent $event) use ($formModifierM ,$formModifierModele){
$form = $event->getForm();
$formModifierM($form, null);
$formModifierModele($form, null);
}
);
$builder->addEventListener(
FormEvents::PRE_SUBMIT,
function(FormEvent $event) use ($formModifierM ,$formModifierModele , $em) {
$form = $event->getForm();
$data = $event->getData();
if (!isset($data['Modele']) || empty($data['Modele']))
{
$marque_id = $data['Marque'];
$marque = $em->getRepository("EK\PlateformeBundle\Entity\Marque")->find($marque_id);
$formModifierM($form, $marque);
}
else
{
$modele_id = $data['Modele'];
$modele = $em->getRepository("EK\PlateformeBundle\Entity\Modele")->find($modele_id);
$formModifierModele($form, $modele);
}
}
);
}
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