AddAttribute.php

<?php
namespace Attributes\Form;

use Zend\Form\Form;

use Zend\Hydrator\Reflection as ReflectionHydrator;

use Attributes\Model\EavAttribute;

class AddAttribute extends Form
{

    public function __construct($name = null, $options = array()){

        parent::__construct($name, $options);
        $this->setHydrator(new ReflectionHydrator());
        $this->setObject(new EavAttribute());
    }

    public function init(){

        $this->add([
                'name'=>'EavAttribute',
                'type'=>AttributeFieldset::class, //service name from module.config.php
        ]);

        $this->add([
                'name' => 'submit',
                'attributes' => [
                        'type' => 'submit',
                        'value' => 'Save',
                        'class' => 'btn btn-primary',
                ],
        ]);

    }

}