我正在嘗試\DateInterval從2個輸入字段中讀取a ，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]);}這是我的DateIntervalType::buildForm：public function buildForm(FormBuilderInterface $builder, array $options){ $builder ->add('amount', IntegerType::class) ->add('kind', ChoiceType::class, ['choices' => ['Year' => 'Y', 'Month' => 'M', 'Week' => 'W']]) ;}這是我嘗試過的變壓器：$builder->get('duration')->addModelTransformer(new CallbackTransformer( function ($property) { return new \DateInterval('P' . $property['amount'] . $property['kind']); }, function ($property) { /* compute $specString from $property assuming it's a \DateInterval */ /* ... */ return ['amount' => 1, 'kind' => 'W']; }));因此，這是行不通的，我$property總是null在從表單數據轉換到表單數據后驗證表單，\DateInterval而我甚至不確定我是否曾經使用過從變壓器轉換\DateInterval成表單數據，我在做什么錯呢？
1 回答
撒科打諢
TA貢獻1934條經驗 獲得超2個贊
看來CallbackTransformer是相反的：
$builder->get('duration')->addModelTransformer(new CallbackTransformer(
function ($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']);
}
));
現在它就像一種魅力！
編輯：\DateInterval將幾周轉換為幾天，'Day' => 'D'在選項列表中也應該有一個選項。
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