添加一个模型转换器,以嵌入形式转换多个字段
Add a model transformer that transforms multiple fields in embedded form
我正在尝试从 2 个输入字段中读取 \DateInterval
,如下所示:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name', TextType::class, ['label' => "Name"])
->add('duration', DateIntervalType::class, ['label' => false])
;
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(['data_class' => NamedInterval::class]);
}
这是我的 DateIntervalType::buildForm
:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('amount', IntegerType::class)
->add('kind', ChoiceType::class, ['choices' => ['Year' => 'Y', 'Month' => 'M', 'Week' => 'W']])
;
}
这是我试过的变压器:
$builder->get('duration')->addModelTransformer(new CallbackTransformer(
function ($property) {
return new \DateInterval('P' . $property['amount'] . $property['kind']);
},
function ($property) {
/* compute $specString from $property assuming it's a \DateInterval */
/* ... */
return ['amount' => 1, 'kind' => 'W'];
}
));
因此这是行不通的,在从表单数据转换为 \DateInterval
时验证表单后,我的 $property
总是 null
,我什至不确定我是否曾经使用过从 \DateInterval
到形成数据的转换器,我做错了什么?
看来 CallbackTransformer
是反的:
$builder->get('duration')->addModelTransformer(new CallbackTransformer(
function ($property) {
/* compute specString from $property assuming it's a \DateInterval */
/* ... */
return ['amount' => 1, 'kind' => 'W'];
},
function ($property) {
if (!$property) return null;
return new \DateInterval('P' . $property['amount'] . $property['kind']);
}
));
现在它就像一个魅力!
编辑:由于 \DateInterval
将周数转换为天数,因此选项列表中也应该有一个选项 'Day' => 'D'
。
我正在尝试从 2 个输入字段中读取 \DateInterval
,如下所示:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name', TextType::class, ['label' => "Name"])
->add('duration', DateIntervalType::class, ['label' => false])
;
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(['data_class' => NamedInterval::class]);
}
这是我的 DateIntervalType::buildForm
:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('amount', IntegerType::class)
->add('kind', ChoiceType::class, ['choices' => ['Year' => 'Y', 'Month' => 'M', 'Week' => 'W']])
;
}
这是我试过的变压器:
$builder->get('duration')->addModelTransformer(new CallbackTransformer(
function ($property) {
return new \DateInterval('P' . $property['amount'] . $property['kind']);
},
function ($property) {
/* compute $specString from $property assuming it's a \DateInterval */
/* ... */
return ['amount' => 1, 'kind' => 'W'];
}
));
因此这是行不通的,在从表单数据转换为 \DateInterval
时验证表单后,我的 $property
总是 null
,我什至不确定我是否曾经使用过从 \DateInterval
到形成数据的转换器,我做错了什么?
看来 CallbackTransformer
是反的:
$builder->get('duration')->addModelTransformer(new CallbackTransformer(
function ($property) {
/* compute specString from $property assuming it's a \DateInterval */
/* ... */
return ['amount' => 1, 'kind' => 'W'];
},
function ($property) {
if (!$property) return null;
return new \DateInterval('P' . $property['amount'] . $property['kind']);
}
));
现在它就像一个魅力!
编辑:由于 \DateInterval
将周数转换为天数,因此选项列表中也应该有一个选项 'Day' => 'D'
。