Php 在Symfony get中嵌入表单集合；变量"；扩大的；“不存在”；自举

目前，我正在尝试遵循symfony页面中的示例：

但对于我自己的页面。事情没有太大变化，我有一个问题和选择，而不是任务和标签（情况是，我想呈现一个表单，允许我创建一个不同答案的问题，这样我们就可以进行“多项选择考试”）

为了做到这一点，我创建了实体Pregunta（问题）和实体Choice。 由于一个问题可以有多个选择，但这些选择只对应于一个问题，因此关系被映射为多个问题对应于一个问题

这是每个实体的实体代码。（至少包括头部和映射信息）

这里是Choice.php

namespace Aoshido\studyBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
* Choice
*
* @ORM\Table()
* @ORM\Entity
*/
class Choice
{
/**
 * @var integer
 *
 * @ORM\Column(name="id", type="integer")
 * @ORM\Id
 * @ORM\GeneratedValue(strategy="AUTO")
 */
private $id;

/**
 * @var string
 *
 * @ORM\Column(name="contenido", type="string", length=1000)
 */
private $contenido;

/**
 * @var boolean
 *
 * @ORM\Column(name="correcto", type="boolean")
 */
private $correcto;

/**
 * @var boolean
 *
 * @ORM\Column(name="activo", type="boolean")
 */
private $activo;

/**
 * @ORM\ManyToOne(targetEntity="Pregunta", inversedBy="choices")
 * @ORM\JoinColumn(name="idPregunta", referencedColumnName="id")
 */
protected $pregunta;

现在，根据这个例子，当涉及到嵌入表单时，您需要创建一个类型（用于提问），并在该类型内为其他实体创建一个类型（用于选择）。所以我做了

<?php
namespace Aoshido\studyBundle\form;
use Aoshido\studyBundle\form\ChoiceType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;

class PreguntaType extends AbstractType {

public function buildForm(FormBuilderInterface $builder, array $options) {
    $builder->add('contenido');
    $builder->add('vof');
    $builder->add('respuesta');

    $builder->add('choices', 'collection', array(
        'type' => new ChoiceType(),
    ));
}

public function setDefaultOptions(OptionsResolverInterface $resolver) {
    $resolver->setDefaults(array(
        'data_class' => 'Aoshido\studyBundle\Entity\Pregunta',
    ));
}

public function getName() {
    return 'pregunta';
}
}

在那之后，我只是复制并修改了Javascript代码，以允许它添加多个选项，但在那之后，每次尝试刷新页面时，我都会遇到这个错误

BraincraftedBootstrapBundle:Form:bootstrap.html.twig第173行中不存在变量“expanded”

这是我的树枝

{% extends "AoshidostudyBundle:ABM:abmPreguntas.html.twig" %}
{% block form %}
<div class="panel panel-info">
    <div class="panel-heading">Agregar preguntas</div>
    <div class="panel-body">
        <div class="form-group">
            {{ form_start(form) }}
            {{ form_row(form.contenido) }}
            {{ form_row(form.respuesta) }}
            <ul class="choice" data-prototype="{{ form_widget(form.choices.vars.prototype)|e }}">
                {% for choice in form.choices %}
                    <li>
                        {{ form_row(choice) }}
                    </li>
                {% endfor %}
            </ul>
            <a href="#" id="add-another-choice">Add another choice</a>
            {{ form_end(form) }}
        </div>
    </div>
</div>

<script type="text/javascript">
    var $collectionHolder;
    // setup an "add a tag" link
    var $addTagLink = $('<a href="#" class="add_tag_link">Add a tag</a>');
    var $newLinkLi = $('<li></li>').append($addTagLink);
    jQuery(document).ready(function () {
        // Get the ul that holds the collection of tags
        $collectionHolder = $('ul.choice');
        // add the "add a tag" anchor and li to the tags ul
        $collectionHolder.append($newLinkLi);
        // count the current form inputs we have (e.g. 2), use that as the new
        // index when inserting a new item (e.g. 2)
        $collectionHolder.data('index', $collectionHolder.find(':input').length);
        $addTagLink.on('click', function (e) {
            // prevent the link from creating a "#" on the URL
            e.preventDefault();
            // add a new tag form (see next code block)
            addTagForm($collectionHolder, $newLinkLi);
        });
    });
    function addTagForm($collectionHolder, $newLinkLi) {
        // Get the data-prototype explained earlier
        var prototype = $collectionHolder.data('prototype');
        // get the new index
        var index = $collectionHolder.data('index');
        // Replace '__name__' in the prototype's HTML to
        // instead be a number based on how many items we have
        var newForm = prototype.replace(/__name__/g, index);
        // increase the index with one for the next item
        $collectionHolder.data('index', index + 1);
        // Display the form in the page in an li, before the "Add a tag" link li
        var $newFormLi = $('<li></li>').append(newForm);
        $newLinkLi.before($newFormLi);
    }
</script>
{%endblock%}

我正在使用

• Symfony 2.3.1
• php 5.3.3

---

我想补充一点，但我的声誉还不够。您是否检查了文档中的Symfony版本是否正确？您可以链接到当前的Symfony文档（从现在的2.6版本开始），但您使用的是2.3.1版本
尝试升级到最新版本，然后发现相同的错误
此外，我看到您正在使用BraincraftedBootstrapBundle。这些文档是用于香草Symfony安装的。你查过他们的文件了吗
这看起来像是你想要达到的目标。使用内联表单从页面中动态添加项目的小代码段：

$this->createFormBuilder(array())
->add('repcol', 'bootstrap_collection', array(
    'type'               => 'repeated',
    'allow_add'          => true,
    'allow_delete'       => true,
    'sub_widget_col'     => 9,
    'button_col'         => 3,
    'prototype_name'     => 'inlinep',
    'options'            => array(
        'type' => 'text',
        'attr' => array('style' => 'inline')
    )
))
->getForm();

---

与论坛网站不同，我们不使用“感谢”或“感谢任何帮助”或签名。请参见“.顺便说一句，这是“提前感谢”，而不是“优势感谢”。您能否准确显示“BraincraftedBootstrapBundle:Form:bootstrap.html.twig”在第173行？

 $builder->add('choices', 'collection', array(
        'type' => new ChoiceType(),
        'allow_add' => true,
    ));

{% extends "AoshidostudyBundle:ABM:abmPreguntas.html.twig" %}
{% block form %}
<div class="panel panel-info">
    <div class="panel-heading">Agregar preguntas</div>
    <div class="panel-body">
        <div class="form-group">
            {{ form_start(form) }}
            {{ form_row(form.contenido) }}
            {{ form_row(form.respuesta) }}
            <ul class="choice" data-prototype="{{ form_widget(form.choices.vars.prototype)|e }}">
                {% for choice in form.choices %}
                    <li>
                        {{ form_row(choice) }}
                    </li>
                {% endfor %}
            </ul>
            <a href="#" id="add-another-choice">Add another choice</a>
            {{ form_end(form) }}
        </div>
    </div>
</div>

<script type="text/javascript">
    var $collectionHolder;
    // setup an "add a tag" link
    var $addTagLink = $('<a href="#" class="add_tag_link">Add a tag</a>');
    var $newLinkLi = $('<li></li>').append($addTagLink);
    jQuery(document).ready(function () {
        // Get the ul that holds the collection of tags
        $collectionHolder = $('ul.choice');
        // add the "add a tag" anchor and li to the tags ul
        $collectionHolder.append($newLinkLi);
        // count the current form inputs we have (e.g. 2), use that as the new
        // index when inserting a new item (e.g. 2)
        $collectionHolder.data('index', $collectionHolder.find(':input').length);
        $addTagLink.on('click', function (e) {
            // prevent the link from creating a "#" on the URL
            e.preventDefault();
            // add a new tag form (see next code block)
            addTagForm($collectionHolder, $newLinkLi);
        });
    });
    function addTagForm($collectionHolder, $newLinkLi) {
        // Get the data-prototype explained earlier
        var prototype = $collectionHolder.data('prototype');
        // get the new index
        var index = $collectionHolder.data('index');
        // Replace '__name__' in the prototype's HTML to
        // instead be a number based on how many items we have
        var newForm = prototype.replace(/__name__/g, index);
        // increase the index with one for the next item
        $collectionHolder.data('index', index + 1);
        // Display the form in the page in an li, before the "Add a tag" link li
        var $newFormLi = $('<li></li>').append(newForm);
        $newLinkLi.before($newFormLi);
    }
</script>
{%endblock%}

        $pregunta = new Pregunta();

    $form = $this->createForm(new PreguntaType(), $pregunta, array(
        'action' => $this->generateUrl('preguntas_ABM'),
        'method' => 'POST',
    ));
return $this->render('AoshidostudyBundle:ABM:newForm.html.twig', array(
                'form' => $form->createView(),
                'paginas' => $pagination,
                'cantidad' => $cant,
    ));

$this->createFormBuilder(array())
->add('repcol', 'bootstrap_collection', array(
    'type'               => 'repeated',
    'allow_add'          => true,
    'allow_delete'       => true,
    'sub_widget_col'     => 9,
    'button_col'         => 3,
    'prototype_name'     => 'inlinep',
    'options'            => array(
        'type' => 'text',
        'attr' => array('style' => 'inline')
    )
))
->getForm();