User.php

<?php
namespace Admin\Model;

use Zend\InputFilter\Factory as InputFactory;
use Zend\InputFilter\InputFilter;
use Zend\InputFilter\InputFilterAwareInterface;
use Zend\InputFilter\InputFilterInterface;
use Core\Model\Entity;

/**
 * Entidade User
 * 
 * @category Admin
 * @package Model
 */
class User extends Entity
{
    /**
     * Nome da tabela. Campo obrigatório
     * @var string
     */
    protected $tableName ='users';

    /**
     * @var int
     */
    protected $id;

    /**
     * @var string
     */
    protected $username;

    /**
     * @var string
     */
    protected $password;

    /**
     * @var string
     */
    protected $name;

    /**
     * @var int
     */
    protected $valid;

    /**
     * @var string
     */
    protected $role;

    /**
     * Configura os filtros dos campos da entidade
     *
     * @return Zend\InputFilter\InputFilter
     */
    public function getInputFilter()
    {
        if (!$this->inputFilter) {
            $inputFilter = new InputFilter();
            $factory     = new InputFactory();

            $inputFilter->add($factory->createInput(array(
                'name'     => 'id',
                'required' => true,
                'filters'  => array(
                    array('name' => 'Int'),
                ),
            )));

            $inputFilter->add($factory->createInput(array(
                'name'     => 'username',
                'required' => true,
                'filters'  => array(
                    array('name' => 'StripTags'),
                    array('name' => 'StringTrim'),
                ),
                'validators' => array(
                    array(
                        'name'    => 'StringLength',
                        'options' => array(
                            'encoding' => 'UTF-8',
                            'min'      => 1,
                            'max'      => 50,
                        ),
                    ),
                ),
            )));

            $inputFilter->add($factory->createInput(array(
                'name'     => 'password',
                'required' => true,
                'filters'  => array(
                    array('name' => 'StripTags'),
                    array('name' => 'StringTrim'),
                ),
            )));

            $inputFilter->add($factory->createInput(array(
                'name'     => 'name',
                'required' => true,
                'filters'  => array(
                    array('name' => 'StripTags'),
                    array('name' => 'StringTrim'),
                ),
            )));

            $inputFilter->add($factory->createInput(array(
                'name'     => 'valid',
                'required' => true,
                'filters'  => array(
                    array('name' => 'Int'),
                ),
            )));

            $inputFilter->add($factory->createInput(array(
                'name'     => 'role',
                'required' => true,
                'filters'  => array(
                    array('name' => 'StripTags'),
                    array('name' => 'StringTrim'),
                ),
                'validators' => array(
                    array(
                        'name'    => 'StringLength',
                        'options' => array(
                            'encoding' => 'UTF-8',
                            'min'      => 1,
                            'max'      => 20,
                        ),
                    ),
                ),
            )));

            $this->inputFilter = $inputFilter;
        }

        return $this->inputFilter;
    }
}