Symfony 2 Forms 实体字段类型分组 [英] Symfony 2 Forms entity Field Type grouping

问题描述

我正在 Symfony2 中渲染一个表单，其中 data_class 映射到 Reservation 实体，并且这个表单有一个实体字段类型，属于 Service 类.Reservation 和 Service 类之间的关系是多对多的.然后一个服务有一个 ServiceType，它是另一个类，从 Service 类

I'm rendering a form in Symfony2 with data_class mapped to Reservation entity, and this form has a entity field type, of class Service. The relation between Reservation and Service class is many to many. A service then has a ServiceType, which is another class, that is mapped as many to one from the Service class

我想要做的是在预订表单中将所有服务显示为复选框，按服务类型分组.到目前为止，我可以像这样一起显示所有服务(代码来自 ReservationType 类):

What I want to do is display all services as checkboxes in the reservation form, grouped by service type. So far, I can display all the services together like this (the code is from ReservationType class):

$builder->add('services','entity', array(
         'class' => 'MyBundle:Service',
         'multiple' => true,
         'expanded'  => true
 ));

并以默认方式显示表单:

And displaying the form the default way:

<form action="{{ path('reservations', {'step': 2}) }}" method="post" {{    form_enctype(form) }}>
   {{ form_widget(form) }}

   <input type="submit" />
</form> 

结果是这样的:

 □ servicetype1 option
 □ servicetype1 another option
 □ servicetype2 option
 □ servicetype2 another option

我想实现的是:

servicetype1:
  □ option
  □ another option
servicetype2:
  □ option
  □ another option

我试图通过使用这样的 query_builder 选项来仅指定服务的子集:

I was trying to specify only subsets of services by using query_builder option like this:

    $builder->add('services','entity', array(
            'class' => 'MyBundle:Service',
            'multiple' => true,
            'expanded' => true,
            'query_builder' => function (MyBundleEntityServiceRepository $repository)
                {return $repository->createQueryBuilder('s')->where('s.serviceType = ?1')->setParameter(1, 1);} ));
    $builder->add('services','entity', array(
            'class' => 'MyBundle:Service',
            'multiple' => true,
            'expanded' => true,
            'query_builder' => function (MyBundleEntityServiceRepository $repository)
                {return $repository->createQueryBuilder('s')->where('s.serviceType = ?1')->setParameter(1, 2);} ));

这是错误的，因为:

1. 我必须指定 ServiceType id
2. 将 'services' 添加到构建器两次，将覆盖第一次添加(这是合乎逻辑的，但无法在不更改实体的情况下解决)

1. I have to specify the ServiceType id
2. Adding the 'services' to the builder twice, will overwrite the first addition (which is logical, but cannot be solved without changing the entities)

处理此类表单的最佳选择是什么?到目前为止只有 2 个 ServiceType-s，但我想让它保持动态和可重用.

What would be the best option for handling forms like this? There are only 2 ServiceType-s so far, but I would like to keep it dynamic, and reusable.

推荐答案

这可以通过使用 group_by 选项:

$builder->add('services','entity', array(
    'class' => 'MyBundle:Service',
    'group_by' => 'serviceType',
    'multiple' => true,
    'expanded'  => true
));

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