Question

我正在尝试创建搜索表单。在这种形式中，我有两个选择框，一个用于国家，第二个用于名为“目的地”的城市。第二个取决于所选国家。我也有其他一些投入。

选择国家/地区后，使用ajax查询正确显示与其相关的所有城市。

问题是如果我选择一个国家并提交表格，目的地不会在地址栏中恢复，但如果我没有选择国家，目的地将被恢复。

如果我没有选择国家

，这就是地址栏的显示方式

/q?title=&country=&destination=&airport=&departureDate=&returnDate=&price=

这就是我选择国家/地区时地址栏的显示方式。如您所见，目的地缺失

/q?title=&country=1&airport=&departureDate=&returnDate=&price=

注意我正在使用方法POST的类似表单来创建或编辑新旅行并且工作正常

SearchTravelType

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 SearchTravelType extends AbstractType
{
 public function buildForm(FormBuilderInterface $builder, array $options)
 {

  ->add('country', 'entity', array(
     'required' => true,
     'class' => 'AppBundle:Country',
     'property' => 'en',
     'multiple' => false,
     'expanded' => false,
     'label' => 'ِCountry',
     'empty_value' => '' ))
  //....

  $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'));
    };

    $builder->addEventListener(
        FormEvents::PRE_SET_DATA,
        function (FormEvent $event) use ($formModifier) {
            // this would be your entity
            $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);
        }
    );


}

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

public function getName()
{
    return null;
}
}

这是表单和javascript代码

<form method="get" action="" class="form-horizontal" role="form" >

 {{ form_widget(form.country, { 'id': 'country' }) }}

 {{ form_widget(form.destination, { 'id': 'city' }) }}

//.............
</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: '{{ path('dashboard_travel_search', {'agence_slug': agence.slug}) }}',
            type: 'POST',           data: data,
        success: function (html) {
            $('#city').replaceWith(
                    // ... with the returned one from the AJAX response.
                    $(html).find('#city')
            );
        }
    });
});

这是控制器

/**
 * @ParamConverter("agence", options={"mapping": {"agence_slug":"slug"}})
 */
public function searchAction(Request $request, Agence $agence)
{
    if (false === $this->get('security.context')->isGranted('view', $agence)) {
        throw new AccessDeniedException('Unauthorised access!');
    }
    /* Instantiate Travel to not get this error
    Error: Call to a member function getCountry() on a non-object
    */
    $travel = new Travel();

    $form = $this->createForm(new SearchTravelType(), $travel);
    if ($request->getMethod() == 'POST' ) {
        $form->handleRequest($request);
    }

    $em = $this->getDoctrine()->getManager();
    $paginator = $this->get('knp_paginator');

    $title = $request->query->get('title');
    $country = $request->query->get('country');
    $destination = $request->query->get('destination');
    $price = $request->query->get('price');
    $departureDate = $request->query->get('departureDate');
    $returnDate = $request->query->get('returnDate');
    $nbDays = $request->query->get('nbDays');
    $nbNights = $request->query->get('nbNights');
    $airport = $request->query->get('airport');
    $enabled = $request->query->get('enabled');

    $qb = $em->getRepository('AppBundle:Travel')->getListSearchTravelsDashboard($agence, $title, $country, $destination, $price, $departureDate, $returnDate, $nbDays, $nbNights, $airport, $enabled);

    $pagination = $paginator->paginate(
        $qb,
        $request->query->get('page', 1), 10);
    $pagination->setSortableTemplate('KnpPaginatorBundle:Pagination:sortable_link_dashboard.html.twig');

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

}

这是生成的表单的Twig HTML标记：

<table id="sample-table-1" class="table table-responsives table-striped table-hover">
    <tr>
        <form class="form-inline" role="form" method="get" action="">
            <td class="center">-</td>
            <td>{{ form_widget(form.title) }}</td>
            <td>{{ form_widget(form.country, { 'id': 'country' }) }}</td>
            <td>{{ form_widget(form.destination, { 'id': 'city' }) }}</td>
            <td>{{ form_widget(form.airport) }}</td>
            <td>{{ form_widget(form.departureDate) }}</td>
            <td>{{ form_widget(form.returnDate) }}</td>
            <td>{{ form_widget(form.price) }}</td>
            <td>{{ form_widget(form.nbDays) }}</td>
            <td>{{ form_widget(form.nbNights) }}</td>
            <td>{{ form_widget(form.enabled) }} {{ form_rest(form) }}</td>
            <td><span class="input-group-btn">
            <button type="submit" class="btn btn-purple btn-sm" title="Rechercher">
                <i class="icon-search bigger-110"></i></button>
            </span>
        </form>
    </tr>

我把它放在桌子外面，现在工作正常。有没有解释？

Answer 1

它不起作用，因为您在form HTML元素中没有tr HTML元素。根据W3C规范，tr元素内部只能包含td和th元素 - 请参阅permitted contents of the tr element in HTML5。

这是一个类似于W3C标准部分中提到的问题 - 标记被破坏了。请参阅unexpected table markup informations in the W3C HTML standards。

此外，您不仅可以在form元素中直接使用tr元素，而且还可以在提交按钮后关闭最后一个td标记，我想，也与这个问题有关。

您的标记是所有问题的根源，我不知道是否有任何浏览器可能正确处理此类代码。通过W3C验证器验证所有内容，然后您可以在控制器等中搜索问题。无效的HTML代码可能是许多意外问题的根源，这些问题很难调试，您最终会在错误的地方搜索。我在这里谈论经验。

Answer 2

首先，更好地使用单独的控制器操作来检索所需的城市，并仅替换选择字段中的选项。使用分页等呈现整个表单有点矫枉过正。其次，检查你从ajax调用中得到的确切内容，尤其是$（html）.find（＆＃39;＃city＆＃39;）选择的输入是否包含＆＃39; name＆＃39;属性。提交表单中缺少的值与Symfony2 Framework本身没有任何共同之处，它与正确的HTML内容完全相同。

Answer 3

问题是因为表单是到表这样的

 <table id="sample-table-1" class="table table-responsives table-striped table-hover">
    <tr>
            <form class="form-inline" role="form" method="get" action="">
                <td class="center">-</td>
                <td>{{ form_widget(form.title) }}</td>
                <td>{{ form_widget(form.country, { 'id': 'country' }) }}</td>
                <td>{{ form_widget(form.destination, { 'id': 'city' }) }}</td>
                <td>{{ form_widget(form.airport) }}</td>
                <td>{{ form_widget(form.departureDate) }}</td>
                <td>{{ form_widget(form.returnDate) }}</td>
                <td>{{ form_widget(form.price) }}</td>
                <td>{{ form_widget(form.nbDays) }}</td>
                <td>{{ form_widget(form.nbNights) }}</td>
                <td>{{ form_widget(form.enabled) }} {{ form_rest(form) }}</td>
                <td><span class="input-group-btn">
                <button type="submit" class="btn btn-purple btn-sm" title="Rechercher">
                    <i class="icon-search bigger-110"></i></button>
                </span>
            </form>
        </tr>

我把它放在桌子外，现在工作正常。有没有解释？

提交表格后未恢复一项数据

3 个答案: