add new class name to choice type is not working properly

[thanhtungka91]

I want to add a new class required to input filed but it was not working as expected, there is no required class is added to input field.

->add('del_flg', Field::CHOICE, [
                'label' => '削除状態',
                'choices' => ['0' => '有効', '1' => '削除済'],
                'expanded' => true,
                'multiple' => false,
                'attr' => ['class' => 'required'],
                'choice_options' => [
                    'wrapper' => ['class' => 'choice-wrapper'],
                    'label_attr' => ['class' => 'required label-class'],
                ],
            ]) 

[Eloar]

have you tried to add it to 'choice_options'?

All you need to do is to move that class config one step up:

->add('del_flg', Field::CHOICE, [
                'label' => '削除状態',
                'choices' => ['0' => '有効', '1' => '削除済'],
                'expanded' => true,
                'multiple' => false,
                'class' => 'required',
                'choice_options' => [
                    'wrapper' => ['class' => 'choice-wrapper'],
                    'label_attr' => ['class' => 'required label-class'],
                ],
            ]) 

also required class is added when field has required validation rule set