symfony2：一个表单的多个实体

做我需要做的第一步是创建一个名为PathsType.php的新表单类型,其中包含与Paths Entity关联的字段

<?php
namespace ADSLinkBundleForm;

use SymfonyComponentFormAbstractType;
use SymfonyComponentFormFormBuilderInterface;
use SymfonyComponentOptionsResolverOptionsResolverInterface;

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' => 'ADSLinkBundleEntityPath'));
}
public function getName() { return 'ads_linkbundle_path'; }
}

然后修改LinkType.php以使用此新表单

<?php
namespace ADSLinkBundleForm;

use SymfonyComponentFormAbstractType;
use SymfonyComponentFormFormBuilderInterface;
use SymfonyComponentOptionsResolverOptionsResolverInterface;

class LinkType extends AbstractType {

public function buildForm(FormBuilderInterface $builder,array(
                'type' => new PathType(),'allow_add' => true,))
        ->add('Submit','submit')
    ;
}

public function setDefaultOptions(OptionsResolverInterface $resolver) {
    $resolver->setDefaults(array('data_class' => 'ADSLinkBundleEntityLink'));
}
public function getName() { return 'ads_linkbundle_link'; }
}

添加allow_add使得您可以添加该表单的多个实例.

在视图中,我现在使用data-prototype属性.在文档中,它有一个使用列表项的示例 – 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,并且在我的路径实体中,我与Link实体有关系,但它没有注意到这种关系并且将link_id字段设为null

为了解决这个问题,我们再次编辑LinkType.php,并将by_reference = false添加到集合定义中.然后我们在实体中编辑addPath方法,如下所示：

public function addPath(ADSLinkBundleEntityPath $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,系统运行正常.它创造了它所需要的一切,只需稍微调整一下显示.我个人选择使用twig宏来修改data-prototype中包含的html输出

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 %}

在表单本身的HTML中,我删除了列表创建,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div作为起点,而不是示例中的ul.

<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>

由于这些路径是我的营销应用程序中的A / B拆分测试的目标地址,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集合类型.