CakePHP未填充单选按钮在提交时更改为不需要的值

I've got this form element:

我有这个表单元素:

$form->input('ChecklistResponseGovernmentInfo.driversLicenseIsOnline', array('type'=>'radio', 'empty'=> true, 'options'=>array(0 => 'No', 1 => 'Yes')))
$form