zf2 Date element not required - php

Question

I have a problem with Zend Framework 2 and Date element. The attribute I'm trying to store is a DateOfBirth, but this attribute maybe empty. For example the date is unknown. The column in the database allows NULL. The Doctrine class attached to it has a attribute that let's it know it allows null. But Zend Framework 2 still gives me this error:
"Value is required and can't be empty".
Even though I set the required attribute=false, also the allow_empty=true, but nothing works.
The attirbute it a member of a nested fieldset within a form. The nesting looks as follows:
UserManagementForm
User (fieldset)
Person (fieldset)
DateOfBirth (element)
Couple examples i tried:
Form not validating correctly zend framework 2
https://github.com/zendframework/zf2/issues/4302
Here is the code I am using at the moment. Hopefully you see something that I'm missing. I don't know if it due to the fact that it is nested, but the rest works perfect, only the date element is causing me trouble.
UserManagementForm
<?php
namespace Application\Form;
use Zend\Form\Form;
class UserManagementForm extends Form
{
public function __construct()
{
parent::__construct('usermanagementform');
$this->setAttribute('method', 'post');
$fieldset = new \Application\Form\Fieldset\User();
$fieldset
->setHydrator(new \Zend\Stdlib\Hydrator\ObjectProperty(false))
->setObject(new \Application\Entity\User())
->setOptions(array('use_as_base_fieldset' => true))
;
$this->add($fieldset);
$this->add(array(
'name' => 'btnSubmit',
'type' => 'submit',
'attributes' => array(
'class' => 'btn-primary',
),
'options' => array(
'column-size' => 'sm-9 col-sm-offset-3',
'label' => 'Save changes',
),
));
}
}
?>
User (Fieldset)
<?php
namespace Application\Form\Fieldset;
use Zend\Form\Fieldset;
class User extends Fieldset
{
public function __construct()
{
parent::__construct('User');
$fieldset = new \Application\Form\Fieldset\EmailAddress();
$fieldset
->setHydrator(new \Zend\Stdlib\Hydrator\ObjectProperty(false))
->setObject(new \Application\Entity\EmailAddress());
$this->add($fieldset);
$fieldset = new \Application\Form\Fieldset\Person();
$fieldset
->setHydrator(new \Zend\Stdlib\Hydrator\ObjectProperty(false))
->setObject(new \Application\Entity\Person());
$this->add($fieldset);
}
}
?>
Person (fieldset)
<?php
namespace Application\Form\Fieldset;
use Zend\Form\Fieldset;
class Person extends Fieldset
{
public function __construct()
{
parent::__construct('Person');
$this->add(array(
'type' => 'date',
'name' => 'DateOfBirth',
'required' => false,
'allowEmpty' => true,
'options' => array(
'label' => 'Date of birth',
'column-size' => 'sm-9',
'label_attributes' => array(
'class' => 'col-sm-3',
),
'format' => 'd-m-Y',
),
));
}
}
?>

Answer 1

'required' isn't an attribute of element but an validator attribute.
The solution consist to implement Zend\InputFilter\InputFilterProviderInterface
use Zend\InputFilter\InputFilterProviderInterface;
class UserManagementForm extends AbstractSbmForm implements InputFilterProviderInterface {
public function __construct()
{
... without change
}
public function getInputFilterSpecification()
{
return array(
'DateOfBirth' => array(
'name' => 'DateOfBirth',
'required' => false,
);
);
}
}