[英]Trouble mapping an existing entity to an embedded form in symfony2
我有一個實體,它位於三個一對一映射的反面。 實體FittingStep
通過FittingStepSingleValue
等進行映射FittingStep
具有一個fittingStepType
字段,用於標識FittingStep
應查找三個實體之一。 我想將該對象嵌入FittingStep
編輯表單中。
我已經將表單定義為每個子表單的服務:
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
這些服務類看起來像這樣(非常基礎)
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';
}
}
我的表單在PRE_SET_DATA上使用EventListener來添加適當的嵌入式表單字段:
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)
{
$resolver->setDefaults(array(
'data_class' => 'Ihear\FittingBundle\Entity\FittingStep'
));
}
public function getName()
{
return 'ihear_fittingbundle_fittingsteptype';
}
}
我的編輯操作的控制器:
/**
* Displays a form to edit an existing FittingStep entity.
*
* @Route("/{id}/edit", name="admin_fittingstep_edit")
* @Method("GET")
* @Template()
*/
public function editAction($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' => $deleteForm->createView(),
);
}
當我嘗試加載表單時,出現異常:
表單的視圖數據應為標量類型,數組類型或\\ ArrayAccess的實例,但是是Ihear \\ FittingBundle \\ Entity \\ FittingStep類的實例。 您可以通過將“ data_class”選項設置為“ Ihear \\ FittingBundle \\ Entity \\ FittingStep”或添加一個將類Ihear \\ FittingBundle \\ Entity \\ FittingStep的實例轉換為標量,數組或\\實例的視圖轉換器來避免此錯誤。 ArrayAccess。
我究竟做錯了什么? 實體之間的對象映射與表單上的映射之間似乎有些脫節。 附帶說明一下,我在創建表單中成功使用了$formModifier
閉包,因此在使用嵌入式表單創建新實體時它可以正常工作。
您必須將fittinStep從隱藏更新為Collection
->add('fittingStep', 'hidden')
收集文檔: http : //symfony.com/doc/current/reference/forms/types/collection.html
->add('fittingStep', 'collection', array('type'=>new FittingStepType(), 'label'=>false))
我解決了這個問題。 實體之間的關系由嵌入式實體引用,因此我在嵌入式表單中添加了父實體的隱藏字段。 這個小麻煩沒有對創建表單造成任何麻煩,但是當我嵌入表單以編輯現有實體時,導致了上面的錯誤。 感謝@albert將我指向該行代碼!
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';
}
}
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