如何在symfony中动态填充下拉列表？ （选择该地区的城市） [英] How to fill the dropdown list dynamically in symfony? (select the cities of the region)
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问题描述
我解释了我的问题：
我必须创建一个表单，根据我们之前的选择填写下拉列表。
I have to create a form where the drop-down lists are filled according to our choices in the previous ones.
我有两个实体：
一个地区可能有多个城市（ManyToOne）关系。
A Region may have several Cities (ManyToOne) relationship.
我按照这里的文件如何使用表单事件动态修改表单（提交表单的动态生成）。
以下是实体的代码：
地区实体：
class Region
{
/**
* @var int
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="nom", type="string", length=255)
*/
private $nom;
/**
* @var int
*
* @ORM\Column(name="numero", type="smallint")
*/
private $numero;
}
Ville实体：
class Ville
{
/**
* @var int
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="nom", type="string", length=255)
*/
private $nom;
/**
* @var int
*
* @ORM\Column(name="numero", type="smallint")
*/
private $numero;
/**
* @var int
*
* @ORM\Column(name="codePostal", type="smallint")
*/
private $codePostal;
/**
* @var Region
*
* @ORM\ManyToOne(targetEntity="GE\CandidatBundle\Entity\Region")
*/
protected $region;
}
我的问题：
我使用query_builder选项检索区域列表，但如何根据区域选择检索城市列表。
I retrieve the list of regions with the query_builder option but how do I retrieve the list of cities according to the choice of region.
AnnonceType：
AnnonceType:
$builder
->add('region', EntityType::class, [
'label' => 'Region *',
'label_attr' => [
"class" => "smaller lighter blue",
"style" => "font-size: 21px;",
],
'class' => 'GECandidatBundle:Region',
'choice_label' => 'nom',
'multiple' => false,
'query_builder' => function(RegionRepository $repository) {
return $repository->getListeRegion();
}
])
->add('ville', TextType::class, [
'label' => 'Ville *',
'label_attr' => [
"class" => "smaller lighter blue",
"style" => "font-size: 21px;",
],
]);
$formModifier = function (FormInterface $form, Region $region = null) {
$ville = null === $region ? array() : $region->getNom();
$form->add('ville', EntityType::class, array(
'class' => 'GECandidatBundle:Ville',
'placeholder' => '',
'choices' => $ville,
'label' => 'Ville *',
'label_attr' => [
"class" => "smaller lighter blue",
"style" => "font-size: 21px;",
],
'choice_label' => 'nom',
'multiple' => false,
/*'query_builder' => function(VilleRepository $repository) {
return $repository->getVilleByRegion();
}*/
));
};
$builder->addEventListener(
FormEvents::PRE_SET_DATA,
function (FormEvent $event) use ($formModifier) {
$data = $event->getData();
$formModifier($event->getForm(), $data->getVille());
}
);
$builder->get('region')->addEventListener(
FormEvents::POST_SUBMIT,
function (FormEvent $event) use ($formModifier) {
$region = $event->getForm()->getData();
$formModifier($event->getForm()->getParent(), $region);
}
);
new.html.twig：
new.html.twig:
{{ form_start(form) }}
{{ form_row(form.region) }} {# <select id="ge_candidatbundle_annonce_region" ... #}
{{ form_row(form.ville) }} {# <select id="ge_candidatbundle_annonce_ville" ... #}
{# ... #}
{{ form_end(form) }}
<script>
var $region = $('#ge_candidatbundle_annonce_region');
$region.change(function() {
var $form = $(this).closest('form');
var data = {};
data[$region.attr('nom')] = $region.val();
$.ajax({
url : $form.attr('action'),
type: $form.attr('method'),
data : data,
success: function(html) {
$('#ge_candidatbundle_annonce_ville').replaceWith(
$(html).find('#ge_candidatbundle_annonce_ville')
);
}
});
});
</script>
推荐答案
更新
-
我修改了实体。
I modified the entities.
我修改了AnnonceType。
I modified the AnnonceType.
我修改了new.html.twig。
I modified the new.html.twig.
以下是实体的代码：
地区实体：
class Region
{
/**
* @var int
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="nom", type="string", length=255)
*/
private $nom;
/**
* @var int
*
* @ORM\Column(name="numero", type="smallint")
*/
private $numero;
/**
* @ORM\OneToMany(targetEntity="GE\CandidatBundle\Entity\Ville", mappedBy="region")
**/
protected $villes;
/**
* Get villes
*
* @return \Doctrine\Common\Collections\Collection
*/
public function getVilles()
{
return $this->villes;
}
}
Ville实体：
class Ville
{
/**
* @var int
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="nom", type="string", length=255)
*/
private $nom;
/**
* @var int
*
* @ORM\Column(name="numero", type="smallint")
*/
private $numero;
/**
* @var int
*
* @ORM\Column(name="codePostal", type="smallint")
*/
private $codePostal;
/**
* @var Region
* @ORM\ManyToOne(targetEntity="GE\CandidatBundle\Entity\Region", inversedBy="villes")
*/
protected $region;
}
AnnonceType：
AnnonceType:
$builder
->add('region', EntityType::class, [
'label' => 'Region *',
'label_attr' => [
"class" => "smaller lighter blue",
"style" => "font-size: 21px;",
],
'class' => 'GECandidatBundle:Region',
'choice_label' => 'nom',
'multiple' => false,
'query_builder' => function(RegionRepository $repository) {
return $repository->getListeRegion();
}
])
->add('ville');
$formModifier = function (FormInterface $form, Region $region = null) {
$villes = null === $region ? array() : $region->getVilles();
$form->add('ville', EntityType::class, array(
'class' => 'GECandidatBundle:Ville',
'placeholder' => '',
'choices' => $villes,
'label' => 'Ville *',
'label_attr' => [
"class" => "smaller lighter blue",
"style" => "font-size: 21px;",
],
'choice_label' => 'nom',
'multiple' => false,
));
};
$builder->addEventListener(
FormEvents::PRE_SET_DATA,
function (FormEvent $event) use ($formModifier) {
$data = $event->getData();
$formModifier($event->getForm(), $data->getVille());
}
);
$builder->get('region')->addEventListener(
FormEvents::POST_SUBMIT,
function (FormEvent $event) use ($formModifier) {
$region = $event->getForm()->getData();
$formModifier($event->getForm()->getParent(), $region);
}
);
new.html.twig：
new.html.twig:
{{ form_start(form) }}
{{ form_row(form.region) }} {# <select id="ge_candidatbundle_annonce_region" ... #}
{{ form_row(form.ville) }} {# <select id="ge_candidatbundle_annonce_ville" ... #}
{# ... #}
{{ form_end(form) }}
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script>
var $region = $('#ge_candidatbundle_annonce_region');
$region.change(function() {
var $form = $(this).closest('form');
var data = {};
data[$region.attr('name')] = $region.val();
$.ajax({
url : $form.attr('action'),
type: $form.attr('method'),
data : data,
success: function(html) {
$('#ge_candidatbundle_annonce_ville').replaceWith(
$(html).find('#ge_candidatbundle_annonce_ville')
);
}
});
});
</script>
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