我正在使用Symfony 3.3。我有一个表单需要根据url中的参数动态显示一些字段。
最初向用户显示仅具有主题字段的表单。之后,他选择一个主题,表格中的一些字段要么隐藏,要么显示。有些字段可以为空,因此无需完成。
我创造了一个看起来像这样的Form
。
就我而言,它感觉和看起来像一团糟。我对symfony很新,关于这个特定场景的文档要么不存在,要么我似乎无法找到它。
const CONTACT_CHOICE_BLANK = 'blank';
const CONTACT_CHOICE_REGISTER = 'register';
const CONTACT_CHOICE_COMPANY = 'company';
const CONTACT_CHOICE_CONTACT = 'contact';
....
/**
* @return string
*/
private function getChoice() {
if($this->requestStack->getCurrentRequest()->query->has('subject')) {
$subject = $this->requestStack->getCurrentRequest()->query->get('subject');
switch($subject){
case self::CONTACT_CHOICE_REGISTER:
$default_choice = 'contact.form.select.option.' . self::CONTACT_CHOICE_REGISTER;
break;
case self::CONTACT_CHOICE_COMPANY:
$default_choice = 'contact.form.select.option.' . self::CONTACT_CHOICE_COMPANY;
break;
case self::CONTACT_CHOICE_CONTACT:
$default_choice = 'contact.form.select.option.' . self::CONTACT_CHOICE_CONTACT;
break;
case self::CONTACT_CHOICE_BLANK:
default:
$default_choice = 'contact.form.select.option.' . self::CONTACT_CHOICE_BLANK;
break;
}
return $default_choice;
}
return self::CONTACT_CHOICE_BLANK;
}
/**
* {@inheritdoc}
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$default_choice = $this->getChoice();
$this->session->set('show_message', false);
$this->session->set('show_email', false);
$this->session->set('show_company', false);
$this->session->set('show_email_pro', false);
$this->session->set('show_company_spouse', false);
$builder
->add('subject', ChoiceType::class, array(
'choices' => array(
'contact.form.select.option.' . self::CONTACT_CHOICE_BLANK => self::CONTACT_CHOICE_BLANK,
'contact.form.select.option.' . self::CONTACT_CHOICE_REGISTER => self::CONTACT_CHOICE_REGISTER,
'contact.form.select.option.' . self::CONTACT_CHOICE_COMPANY => self::CONTACT_CHOICE_COMPANY,
'contact.form.select.option.' . self::CONTACT_CHOICE_CONTACT => self::CONTACT_CHOICE_CONTACT,
),
'label' => 'contact.form.select.subject',
'required' => true,
'data' => $default_choice,
))
->add('firstName', TextType::class, array('label' => 'contact.form.input.firstname'))
->add('familyName', TextType::class, array('label' => 'contact.form.input.familyname'))
->add('phoneNumber', TextType::class, array('label' => 'contact.form.input.phone'))
->add('contactReason', ChoiceType::class, array(
'choices' => array(
'contact.form.select.option.advertising' => 'contact.form.select.option.advertising',
'contact.form.select.option.internet' => 'contact.form.select.option.internet',
'contact.form.select.option.member' => 'contact.form.select.option.member',
'contact.form.select.option.word' => 'contact.form.select.option.word',
'contact.form.select.option.other' => 'contact.form.select.option.other'),
'label' => 'contact.form.select.reason'
))
->add('send', SubmitType::class, array('label' => 'contact.form.textarea.send'));
$builder->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) use ($default_choice) {
$form = $event->getForm();
if($default_choice == 'contact.form.select.option.information_request') {
$form->add('email', TextType::class, array(
'label' => 'contact.form.input.email',
));
$this->session->set('show_email', true);
}
if($default_choice == 'contact.form.select.option.business_membership_application') {
$form->add('emailPro', TextType::class, array(
'label' => 'contact.form.input.emailPro',
));
$form->add('company', TextType::class, array(
'label' => 'contact.form.input.company',
));
$this->session->set('show_email_pro', true);
$this->session->set('show_company', true);
}
if($default_choice == 'contact.form.select.option.registration_request') {
$form->add('companySpouse', TextType::class, array(
'label' => 'contact.form.input.companyspouse',
));
$this->session->set('show_company_spouse', true);
}
if($default_choice == 'contact.form.select.option.registration_request' || $default_choice == 'contact.form.select.option.information_request') {
$form->add('message', TextareaType::class, array(
'label' => 'contact.form.textarea.message',
));
$this->session->set('show_message', true);
}
});
}
在控制器中,处理此表单的函数如下所示:
public function contactAction(Request $request, Mailer $mailer) {
$contact = new Contact();
$form = $this->createForm(ContactType::class, $contact, ['allow_extra_fields' => true]);
$form->handleRequest($request);
if ($form->isSubmitted() && $form->isValid()) {
$mailer->sendContactMail($form);
$em = $this->getDoctrine()->getManager();
$em->persist($contact);
$em->flush();
}
return $this->render('WIVCoreBundle:Core:contact.html.twig', array(
'form' => $form->createView(),
'routes' => [
'blank' => $this->generateUrl('wiv_core_contact', ['subject' => ContactType::CONTACT_CHOICE_BLANK]),
'register' => $this->generateUrl('wiv_core_contact', ['subject' => ContactType::CONTACT_CHOICE_REGISTER]),
'company' => $this->generateUrl('wiv_core_contact', ['subject' => ContactType::CONTACT_CHOICE_COMPANY]),
'contact' => $this->generateUrl('wiv_core_contact', ['subject' => ContactType::CONTACT_CHOICE_CONTACT]),
],
'default_route' => $this->generateUrl('wiv_core_contact'),
));
}
我的问题:是否有更好的方式来显示/隐藏字段?也许某些事情并不像一团糟?
我不需要手握,只是指向正确的方向。也许我错过了文档的某些部分。
是的,有更好的方法来做到这一点。您可以使用表单事件来修改表单的元素。还有一个食谱条目,描述了这个功能:http://symfony.com/doc/current/form/dynamic_form_modification.html
我还强烈推荐Bernhard Schussek(该组件的创建者)的幻灯片:
我不确定如果我得到你的问题,我会提供一个答案,如果我弄错了,可以随意发表评论。
为什么不在控制器中的contact
实体中设置主题:
public function contactAction(Request $request, Mailer $mailer) {
$contact = new Contact();
$contact->setSubject($request->query->get('subject');
.....
}
当将contact
实体传递给它已经拥有主题字段的表单时,然后在PRE_SET_DATA
事件中,您检查subject
实体的contact
字段:
$builder->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) use ($default_choice) {
$form = $event->getForm();
$contact = $event->getData();
if ($contact && $contact->getSubject() == 'value1' ) {
$form->add(...)
// do your magic here
}));
}
资料来源:http://symfony.com/doc/2.8/form/dynamic_form_modification.html