Why allow_empty is ineffective?

Questions Components & MVC
,
1

I have various form fields. Some of those form fields can have values while others may not have. So I have made those as required ‘false’ and also made them as allow_empty true. Come what may I am still getting isEmpty when I validate the form. Even I have tried to avoid form validation even then the error is there.Please advise what are the options for me.

2

The following example shows the use:

final class ExampleForm extends Laminas\Form\Form
    implements Laminas\InputFilter\InputFilterProviderInterface
{
    public function init(): void
    {
        $this->add(
            [
                'name'    => 'artist',
                'type'    => Laminas\Form\Element\Text::class,
                'options' => [
                    'label' => 'Artist',
                ],
            ]
        );

        $this->add(
            [
                'name'    => 'title',
                'type'    => Laminas\Form\Element\Text::class,
                'options' => [
                    'label' => 'Title',
                ],
            ]
        );

        $this->add(
            [
                'name'    => 'genre',
                'type'    => Laminas\Form\Element\Text::class,
                'options' => [
                    'label' => 'Genre',
                ],
            ]
        );
    }

    public function getInputFilterSpecification(): array
    {
        return [
            [
                'name'        => 'artist',
                'required'    => true,
                'allow_empty' => true,
            ],
            [
                'name'        => 'title',
                'required'    => true,
                'allow_empty' => false,
            ],
            [
                'name'        => 'genre',
                'required'    => false,
                'allow_empty' => true,
            ],
        ];
    }
}

$form = new ExampleForm();
$form->init();

$form->setData(
    [
        'artist' => '',
        'title'  => 'David Bowie',
    ]
);
var_dump($form->isValid()); // true

$form->setData(
    [
        'artist' => '',
        'title'  => '',
    ]
);
var_dump($form->isValid()); // false

$form->setData(
    [
        'artist' => '',
        'title'  => 'David Bowie',
        'genre'  => '',
    ]
);
var_dump($form->isValid()); // true

As you can see require means the field itself must be provided. allow_empty does exactly what the name says.

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