Symfony2动态/依赖表单

发布时间：2020-12-14 04:51:27 所属栏目：百科来源：网络整理

导读：我有一个包含3个依赖字段的表单：制造商 – ManufacturerProductGroup – ManufacturerProductSeries 所以我想选择一个制造商,基于制造商产品组和产品系列产品组. 有关于如何处理这种动态形式的CookBook条目它很容易为ManufacturerProductGroup工作.问题是

我有一个包含3个依赖字段的表单：

制造商 – > ManufacturerProductGroup – > ManufacturerProductSeries

所以我想选择一个制造商,基于制造商产品组和产品系列产品组.

有关于如何处理这种动态形式的CookBook条目
它很容易为ManufacturerProductGroup工作.问题是
ManufacturerProductSeries依赖于另一个动态表单/字段.

问题是,我不能在闭包中添加一个Listener,因为我只有
对FormBuilderInterface的访问不再是FormInterface.

自从表单以来,我只能在PRE_SET_DATA侦听器中使用一个侦听器
将被提交然后阻止任何修改.我要么想要添加一种方法
监听器动态地或者只更新POST_SUBMIT监听器中的数据
而不是替换整个领域/形式.

这是一个错误的代码,因为我正在向一个不存在的人添加一个监听器
表单字段(manufacturerProductGroup仅在pre_set_data事件之后可用)

/**
 * @param FormBuilderInterface $builder
 * @param array                $options
 */
public function buildForm(FormBuilderInterface $builder,array $options)
{
    $builder
        ->add('manufacturer','entity',array('class' => 'ArticleBundle:manufacturer','empty_value' => false));

    $manufacturerProductGroupModifier = function(FormInterface $form,Manufacturer $manufacturer)
    {
        $manufacturerProductGroups = $this->em->getRepository('ArticleBundle:ManufacturerProductGroup')
            ->findAvailableByManufacturer($manufacturer);

        $form->add(
            'manufacturerProductGroup',array(
                'class' => 'ArticleBundle:ManufacturerProductGroup','empty_value' => '','choices' => $manufacturerProductGroups
            )
        );
    };

    $manufacturerProductSeriesModifier = function(FormInterface $form,ManufacturerProductGroup $manufacturerProductGroup)
    {
        $manufacturerProductSeries = $this->em->getRepository('ArticleBundle:ManufacturerProductSeries')
            ->findAvailableByManufacturerProductGroup($manufacturerProductGroup);

        $form->add(
            'manufacturerProductSeries',array(
                'class' => 'ArticleBundle:ManufacturerProductSeries','choices' => $manufacturerProductSeries
            )
        );

    };

    $builder->addEventListener(
        FormEvents::PRE_SET_DATA,function(FormEvent $event) use ($manufacturerProductGroupModifier,$manufacturerProductSeriesModifier) {
            /** @var $article Article */
            $article = $event->getData();
            $manufacturerProductGroupModifier($event->getForm(),$article->getManufacturer());
            $manufacturerProductSeriesModifier($event->getForm(),$article->getManufacturerProductGroup());
        }
    );

    $builder->get('manufacturer')->addEventListener(
        FormEvents::POST_SUBMIT,function(FormEvent $event) use ($manufacturerProductGroupModifier) {
            $manufacturer = $event->getForm()->getData();
            $manufacturerProductGroupModifier($event->getForm()->getParent(),$manufacturer);
        }
    );

    $builder->get('manufacturerProductGroup')->addEventListener(
        FormEvents::POST_SUBMIT,function(FormEvent $event) use ($manufacturerProductSeriesModifier) {
            $manufacturerProductGroup = $event->getForm()->getData();
            $manufacturerProductSeriesModifier($event->getForm()->getParent(),$manufacturerProductGroup);
        }
    );
}

解决方法

我用以下代码解决了这个问题：

$addManufacturerProductSeries = function (FormEvent $event) {
        $form = $event->getForm()->getParent();
        $manufacturerProductGroup = $event->getData();

        $form->add(
            'manufacturerProductSeries',array(
                'auto_initialize' => false,'class' => 'ArticleBundle:ManufacturerProductSeries','query_builder' => function (ManufacturerProductSeriesRepository $repository) use ($manufacturerProductGroup) {
                    return $repository->findAvailableByManufacturerProductGroupQueryBuilder($manufacturerProductGroup);
                },)
        );
    };

    $addManufacturerProductGroup = function (FormEvent $event) use ($factory,$addManufacturerProductSeries) {
        $form = $event->getForm()->getParent();
        $manufacturer = $event->getData();

        $fieldBuilder = $factory->createNamedBuilder(
            'manufacturerProductGroup',null,'class' => 'ArticleBundle:ManufacturerProductGroup','query_builder' => function (ManufacturerProductGroupRepository $repository) use ($manufacturer) {
                    return $repository->findAvailableByManufacturerQueryBuilder($manufacturer);
                },)
        );

        $fieldBuilder->addEventListener(FormEvents::POST_SET_DATA,$addManufacturerProductSeries);
        $fieldBuilder->addEventListener(FormEvents::POST_SUBMIT,$addManufacturerProductSeries);

        $form->add($fieldBuilder->getForm());
    };

    $builder->get('manufacturer')->addEventListener(FormEvents::POST_SET_DATA,$addManufacturerProductGroup);
    $builder->get('manufacturer')->addEventListener(FormEvents::POST_SUBMIT,$addManufacturerProductGroup);

（编辑：李大同）

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