经过多次搜索和尝试后，我不知道如何解决我的问题。
我发现了这个：Symfony2 Form Collection Field with Different Choices但解决方案没有给出搜索路径，我没有找到如何在我的情况下调整解决方案。
本地化与地域之间存在多对多的关系，在部门与部门之间存在多对多的关系，本地化与城市之间存在多对多的关系。
要创建本地化，我有以下形式：
class LocalizationType extends AbstractType{
private $manager;
public function __construct(ObjectManager $manager)
{
$this->manager = $manager;
}
public function buildForm(FormBuilderInterface $builder, array $options){
$builder->add('regions', CollectionType::class, array('entry_type' => ChoiceType::class,
'allow_add' => true,
'allow_delete' => true,
'required' => false,
'entry_options' => array(
'choices' => (array_key_exists('regions', $options['localization_value']) ? $options['localization_value']['regions'] : array('' => '')),
'multiple' => false,
'expanded' => false,
'attr' => array('class' => 'region input'),
),
'data' => (array_key_exists('regions', $options['localization_data']) ? $options['localization_data']['regions'] : null),
))
->add('departments', CollectionType::class, array('entry_type' => ChoiceType::class,
'allow_add' => true,
'allow_delete' => true,
'required' => false,
'entry_options' => array(
'choices' => (array_key_exists('departments', $options['localization_value']) ? $options['localization_value']['departments'] : array('' => '')),
'multiple' => false,
'expanded' => false,
'attr' => array('class' => 'department input')
),
'data' => (array_key_exists('departments', $options['localization_data']) ? $options['localization_data']['departments'] : null),
))
->add('cities', CollectionType::class, array('entry_type' => ChoiceType::class,
'allow_add' => true,
'allow_delete' => true,
'required' => false,
'entry_options' => array(
'choices' => (array_key_exists('cities', $options['localization_value']) ? $options['localization_value']['regions'] : array('' => '')),
'multiple' => false,
'expanded' => false,
'attr' => array('class' => 'city input')
),
'data' => (array_key_exists('cities', $options['localization_data']) ? $options['localization_data']['cities'] : null),
))
;
$builder->addEventListener(FormEvents::PRE_SUBMIT, function (FormEvent $event){
$data = $event->getData();
if(!empty($data['regions']) && is_array($data['regions'])){
$regions = array();
foreach($data['regions'] as $region){
$regions[] = $region;
}
$data['regions'] = $this->manager->getRepository('LocalizationBundle:Region')->findRegionsForCreateEntity($regions);
}
if(!empty($data['departments']) && is_array($data['departments'])){
$departments = array();
foreach($data['departments'] as $department){
$departments[] = $department;
}
$data['departments'] = $this->manager->getRepository('LocalizationBundle:Departments')->findDepartmentsForCreateEntity($departments);
}
if(!empty($data['cities']) && is_array($data['cities'])){
$cities = array();
foreach($data['cities'] as $city){
$cities[] = $city;
}
$data['cities'] = $this->manager->getRepository('LocalizationBundle:City')->findCitiesForCreateEntity($cities);
}
$form = $event->getForm();
$form->add('regions', CollectionType::class, array('entry_type' => ChoiceType::class,
'allow_add' => true,
'allow_delete' => true,
'required' => false,
'entry_options' => array(
'choices' => $data['regions'],
'multiple' => false,
'expanded' => false,
'attr' => array('class' => 'region input')
)
));
$form->add('departments', CollectionType::class, array('entry_type' => ChoiceType::class,
'allow_add' => true,
'allow_delete' => true,
'required' => false,
'entry_options' => array(
'choices' => $data['departments'],
'multiple' => false,
'expanded' => false,
'attr' => array('class' => 'department input')
)
))
->add('cities', CollectionType::class, array('entry_type' => ChoiceType::class,
'allow_add' => true,
'allow_delete' => true,
'required' => false,
'entry_options' => array(
'choices' => $data['cities'],
'multiple' => false,
'expanded' => false,
'attr' => array('class' => 'city input')
)
))
;
});
}
public function configureOptions(OptionsResolver $resolver){
$resolver->setDefaults(array(
'data_class' => Localization::class,
'localization_data' => array('regions' => '', 'departments' => '', 'cities' => ''),
'localization_value' => array('regions' => '', 'departments' => '', 'cities' => ''),
));
}
我选择一个ChoiceType为空，因为我有几个City例如（更多25k）所以我更喜欢在我的视图中用AJAX加载其中几个并在select2中渲染它，它适用于添加动作但是对于编辑动作我有一个问题我希望我的收藏品的每个字段都有不同的价值。
为了说明我的故事，我想要这个结果：
<label>Region n°1</label>
<select id="" name="">
<option value="foo1">bar1</option>
</select>
<label>Region n°2</label>
<select id="" name="">
<option value="foo2">bar2</option>
</select>
我目前的结果是：
<label>0</label>
<select id="" name="">
<option value="foo1" selected="selected">bar1</option>
<option value="foo2">bar2</option>
</select>
<label>1</label>
<select id="" name="">
<option value="foo1">bar1</option>
<option value="foo2" selected="selected">bar2</option>
</select>
如果我理解我需要创建自己的模板，更改标签，好的但是只显示选择的选项而不显示其他选项我认为我需要在PRE_SET_DATA上使用FormEventListener，但我不知道如何实现它。所以，如果有人有解决方案，我会接受它。
答案 0 :(得分：0)
我回答我自己的问题，在PRE_SET_DATA上使用FormEventListener，在POST_SET_DATA上尝试，或者使用choice_loader，似乎不可能用Symfony方式做我想要的，但我不太明白为什么。我感觉回到Jquery的方式来删除未使用以下代码选择的选项，我不喜欢但我没有看到其他解决方案：
<script type="text/javascript">
$.each($('.region'), function(i, val){
$(val).find('option:not(:selected)').remove();
})
$.each($('.department'), function(i, val){
$(val).find('option:not(:selected)').remove();
})
$.each($('.city'), function(i, val){
$(val).find('option:not(:selected)').remove();
})
</script>
如果我错了，我不会传递解决的主题