Ajax查询在添加新帖子时起作用，但在更新实体时不起作用

Question

我有两个选择框一个用于国家，第二个用于城市，第二个用于选择第一个。

我的代码是作为例子动态生成的文件中提交的表单添加一个新的职位时http://symfony.com/doc/current/cookbook/form/dynamic_form_modification.html#cookbook-form-events-submitted-data

所有的事情做工精细，而是试图做更新发布时，该阿贾克斯查询要显示城市不起作用。

这是控制器

// newAction 
/** 
* @ParamConverter("agence", options={"mapping": {"agence_slug":"slug"}}) 
*/ 
public function newAction(Agence $agence, Request $request) 
{ 
    $em = $this->getDoctrine()->getManager(); 
    $travel = new Travel(); 
    $form = $this->createForm(new TravelType($agence), $travel); 

    if ($request->getMethod() == 'POST') 
    { 
     //.... 
    } 

    return $this->render('AppBundle:Dashboard/Travel:new.html.twig', 
    array(
     'form' => $form->createView() , 
     'agence' => $agence, 
     )); 
} 

//editAction 
/** 
* @ParamConverter("agence", options={"mapping": {"agence_slug":"slug"}}) 
* @ParamConverter("travel", options={"mapping": {"travel_id":"id"}}) 
*/ 
public function editAction(Travel $travel, Agence $agence, Request $request) 
{ 
    $em = $this->getDoctrine()->getManager(); 

    $form = $this->createForm(new TravelEditType($agence), $travel); 

    if ($request->getMethod() == 'POST'){ 
     //.... 
    } 

    return $this->render('AppBundle:Dashboard/Travel:edit.html.twig', 
    array(
     'form' => $form->createView() , 
     'travel' => $travel, 
     'agence' => $agence, 
     )); 
} 

travelType和Ti工作良好

namespace AppBundle\Form; 

use Symfony\Component\Form\AbstractType; 
use Symfony\Component\Form\FormBuilderInterface; 
use Symfony\Component\OptionsResolver\OptionsResolverInterface; 
use Symfony\Component\Form\FormEvents; 
use Symfony\Component\Form\FormEvent; 

//........ 
use Symfony\Component\Form\FormInterface; 
use AppBundle\Entity\Country; 

class TravelType extends AbstractType 
{ 
public function buildForm(FormBuilderInterface $builder, array $options) 
{ 
    //.... 
    $formModifier = function (FormInterface $form, Country $country = null) { 
     $cities = null === $country ? array() : $country->getCities(); 

     $form->add('destination', 'entity', array(
      'class'  => 'AppBundle:CityWorld', 
      'choices'  => $cities, 
      'multiple' => false, 
      'expanded' => false, 
      'property' => 'name', 
      'label' => 'Destination', 
      'attr' => array('class' => 'col-xs-10 col-sm-10', 'placeholder' => 'Destination'), 
     )); 
    }; 

    $builder->addEventListener(
     FormEvents::PRE_SET_DATA, 
     function (FormEvent $event) use ($formModifier) { 
      // this would be your entity, i.e. SportMeetup 
      $data = $event->getData(); 

      $formModifier($event->getForm(), $data->getCountry()); 
     } 
    ); 

    $builder->get('country')->addEventListener(
     FormEvents::POST_SUBMIT, 
     function (FormEvent $event) use ($formModifier) { 
      // It's important here to fetch $event->getForm()->getData(), as 
      // $event->getData() will get you the client data (that is, the ID) 
      $country = $event->getForm()->getData(); 

      // since we've added the listener to the child, we'll have to pass on 
      // the parent to the callback functions! 
      $formModifier($event->getForm()->getParent(), $country); 
     } 
    ); 

    $builder->addEventListener(FormEvents::POST_SUBMIT, function ($event) { 
     $event->stopPropagation(); 
    }, 90000000000000); // Always set a higher priority than ValidationListener 

} 

public function setDefaultOptions(OptionsResolverInterface $resolver) 
{ 
    $resolver->setDefaults(array(
     'data_class' => 'AppBundle\Entity\Travel' 
    )); 
} 

public function getName() 
{ 
    return null; 
} 
} 

这是TravelEditType

namespace AppBundle\Form; 

use Symfony\Component\Form\AbstractType; 
use Symfony\Component\Form\FormBuilderInterface; 
use Symfony\Component\OptionsResolver\OptionsResolverInterface; 
use Symfony\Component\Form\FormEvents; 
use Symfony\Component\Form\FormEvent; 
//........ 
use Symfony\Component\Form\FormInterface; 
use AppBundle\Entity\Country; 

class TravelEditType extends TravelType 
{ 
public function buildForm(FormBuilderInterface $builder, array $options) 
{ 
    parent::buildForm($builder, $options) ; 

} 

public function getName() 
{ 
    return null; 
} 
} 

这是形式和JavaScript代码

<form method="post" action="" class="form-horizontal" role="form" {{ form_enctype(form) }} > 
//............. 
</form> 

<script type="text/javascript"> 
var $county = $('#country'); 

$county.change(function() { 
    // ... retrieve the corresponding form. 
    var $form = $(this).closest('form'); 

    var data = {}; 
    data[$county.attr('name')] = $county.val(); 
    // Submit data via AJAX to the form's action path. 
    $.ajax({ 
     url: $form.attr('action'), 
     type: $form.attr('method'), 
     data: data, 
     success: function (html) { 
      // Replace current position field ... 
      $('#city').replaceWith(
        // ... with the returned one from the AJAX response. 
        $(html).find('#city') 
      ); 
      // Position field now displays the appropriate positions. 
     } 
    }); 
}); 

Answer 1

尝试没有参数的URI：

dashboard_city_ajax: 
    path: /citiies/ajax 
    defaults: { _controller: AppBundle:TravelDashboard:ajaxCities } 

并与POST发送数据：

$.ajax({ 
     url: '{{ path('dashboard_city_ajax') }}', 
     type: 'POST', 
     data: { agence_slug: '{{ agenceSlug }}' }, 

可以在控制器接收它：

$request->request->get('bar', 'default value if bar does not exist'); 

Answer 2

问题在于您的路线匹配。有很多方法可以解决问题。尝试只包括在你的阿贾克斯路线requirements匹配的路线或在$ .ajax功能使用另一条路线，例如

最简单的方法（如果你不想重建你的控制器）只是重建你的路线，并把首先你的ajax路线如下：

dashboard_city_ajax: 
    path: /{ajax}/{agence_slug}/citiies 
    defaults: { _controller: AppBundle:TravelDashboard:ajaxCities } 
    requirements: 
     ajax: ajax 

$.ajax({ 
     url: '{{ path('dashboard_city_ajax', {'agence_slug': agence.slug, 'ajax': 'ajax' }) }}', 
     type: 'POST', 
     data: data, 

但是正确的方法恕我直言是从请求中获取数据。例如

vplanning_ajax: 
    path: /ajax 
    defaults: { _controller: VplanningPageBundle:Page:Ajax } 


function getData(init) { 
    $.post(
     {{ path('vplanning_ajax') }}, 
     { 
      agence_slug: agence.slug, 
      yourdata2: 'yourdata2 
     } , 
     function (data) { 
      handleData(data); 
     } 
    ); 
} 

而在你的控制你只是做

$agence_slug = $this->request->request->get('agence_slug'); 
$yourdata2 = $this->request->request->get('yourdata2); 

...