symfony2:一个表单的多个实体

Question

我有2个实体:

ADS\LinkBundle\Entity\Link:
type: entity
table: null
repositoryClass: ADS\LinkBundle\Entity\LinkRepository
id:
    id:
        type: integer
        id: true
        generator:
            strategy: AUTO
fields:
    dateAdded:
        type: datetime
    expirationDate:
        type: datetime
        nullable: true
    designator:
        type: string
        length: 255
        nullable: false
        unique: true
    slug:
        type: string
        length: 255
        nullable: true
        unique: true
manyToOne:
    company:
        targetEntity: ADS\UserBundle\Entity\Company
        inversedBy: link
        joinColumn:
            name: company_id
            referencedColumnName: id
        nullable: true
    createdBy:
        targetEntity: ADS\UserBundle\Entity\User
        inversedBy: link
        joinColumn:
            name: createdBy_id
            referencedColumnName: id
    domain:
        targetEntity: ADS\DomainBundle\Entity\Domain
        inversedBy: link
        joinColumn:
            name: domain_id
            referencedColumnNames: id
oneToMany:
        paths:
            targetEntity: ADS\LinkBundle\Entity\Path
            mappedBy: link
            cascade: [persist]
lifecycleCallbacks: {  }

和

ADS\LinkBundle\Entity\Path:
type: entity
table: null
repositoryClass: ADS\LinkBundle\Entity\PathRepository
id:
    id:
        type: integer
        id: true
        generator:
            strategy: AUTO
fields:
    pathAddress:
        type: string
        length: 255
    pathWeight:
        type: string
        length: 255
manyToOne:
    link:
        targetEntity: ADS\LinkBundle\Entity\Link
        inversedBy: paths
        joinColumn:
            name: link_id
            referencedColumnName: id
lifecycleCallbacks: {  }

除了实体的路径部分,我已经弄明白了.这是用于A/B分割测试,因此每个链接可以有2个路径.每个路径将包含一个网址和一个数字(0 - 100)

这是我目前状态的形式:

<?php
namespace ADS\LinkBundle\Form;

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

class PathType extends AbstractType {

public function buildForm(FormBuilderInterface $builder, array $options) {
    $builder
        ->add('pathAddress')
        ->add('pathWeight')
    ;
}

public function setDefaultOptions(OptionsResolverInterface $resolver) {
    $resolver->setDefaults(array('data_class' => 'ADS\LinkBundle\Entity\Path'));
}
public function getName() { return 'ads_linkbundle_link'; }
}

和

<?php
namespace ADS\LinkBundle\Form;

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

    class LinkType extends AbstractType {

public function buildForm(FormBuilderInterface $builder, array $options) {
    $builder
        ->add('designator')
        ->add('domain', 'entity', array(
            'class' => 'ADS\DomainBundle\Entity\Domain',
            'property' => 'domainAddress'
        ))
        ->add('paths', 'collection', array('type' => new PathType(), 'allow_add' => true))
        ->add('Submit', 'submit')
    ;
}

public function setDefaultOptions(OptionsResolverInterface $resolver) {
    $resolver->setDefaults(array('data_class' => 'ADS\LinkBundle\Entity\Link'));
}
public function getName() { return 'ads_linkbundle_link'; }
}

我需要弄清楚的是,在创建链接时,我还需要能够创建正确的路径和权重.在创建链接之前,路径不在数据库中.

这是我的控制器所拥有的:

 public function newAction(Request $request) {
    $entity = new Link();
    $form = $this->createForm(new LinkType(), $entity);
    if ($request->isMethod('POST')) {
        $form->handleRequest($request);
        if ($form->isValid()) {
            $code = $this->get('ads.default');
            $em = $this->getDoctrine()->getManager();
            $user = $this->getUser();
            $entity->setDateAdded(new \DateTime("now"));
            $entity->setCreatedBy($user);
            $entity->setSlug($code->generateToken(5));
            $entity->setCompany($user->getParentCompany());
            $em->persist($entity);
            $em->flush();
            return new Response(json_encode(array('error' => '0', 'success' => '1')));
        }
        return new Response(json_encode(array('error' => count($form->getErrors()), 'success' => '0')));
    }

    return $this->render('ADSLinkBundle:Default:form.html.twig', array(
        'entity' => $entity,
        'saction' => $this->generateUrl('ads.link.new'),
        'form' => $form->createView()
    ));
}

Answer 1

感谢@Onema(阅读上面的评论),我已经想到了这一点.通过阅读http://symfony.com/doc/current/cookbook/form/form_collections.html上的文档, 它为我提供了完成此操作所需的信息.

做我需要做的第一步是创建一个新的form type被调用PathsType.php来容纳与之相关的字段Paths Entity

<?php
namespace ADS\LinkBundle\Form;

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

class PathType extends AbstractType {

public function buildForm(FormBuilderInterface $builder, array $options) {
    $builder
        ->add('pathAddress')
        ->add('pathWeight')
    ;
}

public function setDefaultOptions(OptionsResolverInterface $resolver) {
    $resolver->setDefaults(array('data_class' => 'ADS\LinkBundle\Entity\Path'));
}
public function getName() { return 'ads_linkbundle_path'; }
}

然后修改LinkType.php以利用这个新表格

<?php
namespace ADS\LinkBundle\Form;

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

class LinkType extends AbstractType {

public function buildForm(FormBuilderInterface $builder, array $options) {
    $builder
        ->add('designator')
        ->add('domain', 'entity', array(
            'class' => 'ADS\DomainBundle\Entity\Domain',
            'property' => 'domainAddress'
        ))
        ->add('paths', 'collection', array(
                'type' => new PathType(), 
                 'allow_add' => true,))
        ->add('Submit', 'submit')
    ;
}

public function setDefaultOptions(OptionsResolverInterface $resolver) {
    $resolver->setDefaults(array('data_class' => 'ADS\LinkBundle\Entity\Link'));
}
public function getName() { return 'ads_linkbundle_link'; }
}

添加allow_add它使您可以添加该表单的多个实例.

在视图中,我现在使用该data-prototype属性.在文档中,它使用了一个列表项的示例 - 这就是我开始的地方.

<ul class="tags" data-prototype="{{ form_widget(form.paths.vars.prototype)|e }}"></ul>

然后是jQuery函数(在上面的文档链接中列出,简单的复制/粘贴将起作用)

这使得系统工作,有一个小问题,在我paths entity,我有一个关系,Link entity但它没有注意到这种关系,并有该link_id领域作为null

为了解决这个问题,我们LinkType.php再次编辑,并添加by_reference = false到collection定义中.然后我们编辑addPath实体内部的方法,如下所示:

public function addPath(\ADS\LinkBundle\Entity\Path $paths)
{
    $paths->setLink($this);
    $this->paths->add($paths);
}

这将当前链接对象设置为与路径关联的链接.

此时,系统正在完美运行.它创造了它所需要的一切,只需稍微调整显示.我个人选择使用a twig macro来修改其中包含的html输出data-prototype

我现在坐的宏(不完整 - 但工作),我添加到我的form.html.twig的开头

{% macro path_prototype(paths) %}
    <div class="form-group col-md-10">
        <div class="col-md-3">
            <label class="control-label">Address</label>
        </div>
        <div class="col-md-9">
            {{ form_widget(paths.pathAddress, { 'attr' : { 'class' : 'form-control required' }}) }}
        </div>
    </div>
{% endmacro %}

在HTML表单本身中,我删除了list创建,并将其替换为:

<div class="form-group">
        {{ form_label(form.paths,'Destination(s)', { 'label_attr' : {'class' : 'col-md-12 control-label align-left text-left' }}) }}
        <div class="tags" data-prototype="{{ _self.path_prototype(form.paths.vars.prototype)|e }}">
        </div>
    </div>

然后我修改了我的javascript以使用它div作为起点,而不是ul在示例中.

<script type="text/javascript">
    var $collectionHolder;

    // setup an "add a tag" link
    var $addTagLink = $('<a href="#" class="add_tag_link btn btn-xs btn-success">Add Another Destination</a>');
    var $newLinkLi = $('<div></div>').append($addTagLink);

    jQuery(document).ready(function() {
        // Get the ul that holds the collection of tags
        $collectionHolder = $('div.tags');

        // 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', $collectionHolder.find(':input').length);
        addTagForm($collectionHolder, $newLinkLi);

        $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);
        console.log(index);
        if (index == 1) {
            console.log('something');
            $('a.add_tag_link').remove();
        }
        // Display the form in the page in an li, before the "Add a tag" link li
        var $newFormLi = newForm;
        $newLinkLi.before($newFormLi);
    }
</script>

由于这些paths是我的营销应用程序中的A/B分割测试的目标地址,因此我选择将路径限制为每个链接2个.有了这个,我已经成功设置了一个表单来使用一个collections类型.