如何在Symfony中的表单构建器中获取字段值。 我在表格中有2个下拉列表 我想在页面打开时基于Dropdown1的Dropdown2中的相关选项。
这是我的表格
use Symfony\Component\Form\FormEvents;
use Symfony\Component\Form\Event\DataEvent;
use C2Educate\ToolsBundle\Entity\Students;
public function buildForm(FormBuilder $builder, array $options) {
第1场:
$builder->add('leadSource', 'entity', array(
'label' => 'How did you hear about C2? Source ',
'class' => 'C2EducateToolsBundle:LeadSources',
'query_builder' => function($repo) {
return $repo->createQueryBuilder('p')->orderBy('p.sort_order', 'ASC');
},
'property' => 'name',
'empty_value' => 'Select'
));
$leadSource = 1;
$leadSource = 1;
- 当我静态分配值时它会起作用,但我想获取“leadSource”的值并将其分配给$leadSource
我想获取leadSource并将其传递给leadSourceSub查询
第2场:
$builder->addEventListener(FormEvents::PRE_SET_DATA, function (DataEvent $event) {
$form = $event->getForm();
$entity = $event->getData();
$leadSource = $entity->getLeadSourceID();
$form->add('leadSourceSub', 'C2Educate\ToolsBundle\Entity\Students', array(
'label' => ' Source Detail ',
'required' => true,
'class' => 'C2EducateToolsBundle:LeadSourceSubs',
'query_builder' => function($repo) use ($leadSource) {
return $repo->createQueryBuilder('p')
->where('p.lead_source_id =:leadSource')
->setParameter('leadSource', $leadSource)
->orderBy('p.sort_order', 'ASC');
},
'property' => 'name',
'empty_value' => 'Select'
));
});
答案 0 :(得分:3)
您无法从$builder
获取表单数据,因为...它是表单构建器,而不是表单。它还不包含任何数据。
要完成这项工作,您需要使用FormEvents
。在这种情况下,您可能需要FormEvents::PRE_SET_DATA
事件监听器。
$builder->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) {
$form = $event->getForm();
// in your case it's C2EducateToolsBundle:LeadSourceSubs
$entity = $event->getData();
$leadSource = $entity->getLeadSource();
// adding this field again will override it.
$form->add('leadSourceSub', 'entity', array(
'label' => ' Source Detail ',
'required' => true,
'class' => 'C2EducateToolsBundle:LeadSourceSubs',
'query_builder' => function($repo) use ($leadSource) {
return $repo->createQueryBuilder('p')
->where('p.lead_source_id =:leadSource')
->setParameter('leadSource', $leadSource)
->orderBy('p.sort_order', 'ASC');
},
'property' => 'name',
'empty_value' => 'Select'
));
}
});
请注意,此代码未经过测试,可能需要进行一些验证,以确定$entity
是否符合您的预期。