我有一个实体，它位于三个一对一映射的反面。实体FittingStep由FittingStepSingleValue等映射。FittingStep具有字段fittingStepType，其标识FittingStep应当查找三个实体中的哪一个。我想在FittingStep编辑表单中嵌入该对象
我已经将表单定义为每个子表单的服务：
services:
ihear.form.fitting_step_single_value:
class: Ihear'FittingBundle'Form'FittingStepSingleValueType
arguments: [@security.context]
tags:
-
name: form.type
alias: ihear_fittingbundle_fittingstepsinglevaluetype
ihear.form.fitting_step_double_value:
class: Ihear'FittingBundle'Form'FittingStepDoubleValueType
arguments: [@security.context]
tags:
-
name: form.type
alias: ihear_fittingbundle_fittingstepdoublevaluetype
ihear.form.fitting_step_option:
class: Ihear'FittingBundle'Form'FittingStepOptionType
arguments: [@security.context]
tags:
-
name: form.type
alias: ihear_fittingbundle_fittingstepoptiontype
这些服务类看起来是这样的（非常基本）
class FittingStepSingleValueType extends AbstractType
{
private $securityContext;
public function __construct(SecurityContext $securityContext)
{
$this->securityContext = $securityContext;
}
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('max1')
->add('description1')
->add('fittingStep', 'hidden')
;
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'Ihear'FittingBundle'Entity'FittingStepSingleValue'
));
}
public function getName()
{
return 'ihear_fittingbundle_fittingstepsinglevaluetype';
}
}
我的表单在PRE_SET_DATA上使用EventListener来添加适当的嵌入表单字段：
class FittingStepType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name')
->add('abbreviation')
->add('description')
->add('fittingStepType',
'choice',
['choices' => ['SingleValue' => 'SingleValue',
'DoubleValue' => 'DoubleValue',
'Option' => 'Option'],
'empty_value' => 'select one please'])
;
$formModifier = function(FormInterface $form, $fittingStepType) {
switch ($fittingStepType) {
case 'SingleValue':
$form->add('fittingStepSingleValue',
'ihear_fittingbundle_fittingstepsinglevaluetype');
if ($form->has('fittingStepDoubleValue'))
$form->remove('fittingStepDoubleValue');
if ($form->has('fittingStepOption'))
$form->remove('fittingStepOption');
break;
case 'DoubleValue':
$form->add('fittingStepDoubleValue',
'ihear_fittingbundle_fittingstepdoublevaluetype');
if ($form->has('fittingStepSingleValue'))
$form->remove('fittingStepSingleValue');
if ($form->has('fittingStepOption'))
$form->remove('fittingStepOption');
break;
case 'Option':
$form->add('fittingStepOption',
'ihear_fittingbundle_fittingstepoptiontype');
if ($form->has('fittingStepSingleValue'))
$form->remove('fittingStepSingleValue');
if ($form->has('fittingStepDoubleValue'))
$form->remove('fittingStepDoubleValue');
break;
}
};
$builder->addEventListener(
FormEvents::PRE_SET_DATA,
function(FormEvent $event) use ($formModifier) {
$form = $event->getForm();
// this is the FittingStep
$data = $event->getData();
// this is the Entity that contains the value(s)
// i.e. FittingStepSingleValue
$fittingStepType = $data->getFittingStepType();
switch ($fittingStepType) {
case 'SingleValue':
$formModifier($form, $fittingStepType);
break;
case 'DoubleValue':
$formModifier($form, $fittingStepType);
break;
case 'Option':
$formModifier($form, $fittingStepType);
break;
}
}
);
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'Ihear'FittingBundle'Entity'FittingStep'
));
}
public function getName()
{
return 'ihear_fittingbundle_fittingsteptype';
}
}
我的编辑操作控制器：
/**
* Displays a form to edit an existing FittingStep entity.
*
* @Route("/{id}/edit", name="admin_fittingstep_edit")
* @Method("GET")
* @Template()
*/
public function editAction($id)
{
$em = $this->getDoctrine()->getManager();
$entity = $em->getRepository('IhearFittingBundle:FittingStep')->find($id);
if (!$entity) {
throw $this->createNotFoundException(
'Unable to find FittingStep entity.');
}
$editForm = $this->createForm(new FittingStepType(), $entity);
$deleteForm = $this->createDeleteForm($id);
return array(
'entity' => $entity,
'edit_form' => $editForm->createView(),
'delete_form' => $deleteForm->createView(),
);
}
当我尝试加载表单时，我得到一个异常：
表单的视图数据应为标量、数组或''ArrayAccess的实例，但它是类的实例Ihear''FittingBundle''Entity''FittingStep。您可以通过以下方式避免此错误将"data_class"选项设置为"Ihear''FittingBundle''Entity''FittingStep"或通过添加视图转换类实例的转换器Ihear''FittingBundle''Entity''FittingStep到标量、数组或实例的'' ArrayAccess。
我做错了什么？实体之间的对象映射和表单上的映射之间似乎存在一些脱节。顺便说一句，我在创建表单中成功地使用了$formModifier闭包，因此在使用嵌入式表单创建新实体时，它可以很好地工作。
您必须将fittingStep从隐藏更新为收集
->add('fittingStep', 'hidden')
收款单：http://symfony.com/doc/current/reference/forms/types/collection.html
->add('fittingStep', 'collection', array('type'=>new FittingStepType(), 'label'=>false))
我解决了这个问题。实体之间的关系被嵌入的实体引用了，所以我在嵌入的表单中为父实体添加了一个隐藏字段。这个小流氓并没有给创建表单带来任何麻烦，而是在我嵌入表单编辑现有实体时导致了上述错误。谢谢@albert给我指了那行代码！
class FittingStepSingleValueType extends AbstractType
{
private $securityContext;
public function __construct(SecurityContext $securityContext)
{
$this->securityContext = $securityContext;
}
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('max1')
->add('description1')
// this line was the culprit
//->add('fittingStep', 'hidden')
;
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'Ihear'FittingBundle'Entity'FittingStepSingleValue'
));
}
public function getName()
{
return 'ihear_fittingbundle_fittingstepsinglevaluetype';
}
}