// Controller User

  public function action_create() {
        $view = View::factory('user/create');
        $view->errors = array();

        if (HTTP_Request::POST == $this->request->method()) {
            try {
                //Add additional values
                $additional = array(
                    'ip' => $_SERVER['REMOTE_ADDR'],
                    'register_date' => time(),
                    'activation_key' => sha1(uniqid(Text::random('alnum', 32), TRUE))
                );

                $post = Arr::merge($this->request->post(), $additional);
                // Create the user using form values
                $user = ORM::factory('user');
                $user->create_user($post, array(
                    'username',
                    'password',
                    'email',
                    'register_date',
                    'activation_key',
                    'ip'
                ));

                // Grant user login role
                $user->add('roles', ORM::factory('role', array('name' => 'login')));

                // Reset values so form is not sticky
                $_POST = array();

            } catch (ORM_Validation_Exception $e) {
                $view->errors = $e->errors(I18n::$lang);
            }
        }

        $this->content = $view->render();
    }

//Model

defined('SYSPATH') or die('No direct access allowed.');

class Model_User extends Model_Auth_User {
     //Need Columns for PDO
    protected $_table_columns = array(
        'id' => array(),
        'email' => array(),
        'username' => array(),
        'password' => array(),
        'ip' => array(),
        'register_date' => array(),
        'activation_key' => array(),
        'logins' => array(),
        'last_login' => array()
    );

    public function rules() {
        return array(
            'username' => array(
                array('not_empty'),
                array('alpha_dash'),
                array('min_length', array(':value', 4)),
                array('max_length', array(':value', 32)),
                array(array($this, 'unique'), array('username', ':value')),
            ),
            'password' => array(
                array('not_empty'),
            ),
            'email' => array(
                array('not_empty'),
                array('email'),
                array(array($this, 'unique'), array('email', ':value')),
            ),
             'terms' => array(
                array('equals', array(':value', 'on')), //Added Terms
            ),
        );
    }

    public function extra_rules() {
        return array(); //extra rules are empty now
        return array(
            'terms' => array(
                array('equals', array(':value', 'on')),
            ),
        );
    }

    public static function get_password_validation($values) {
        return Validation::factory($values)
                        ->rule('password', 'min_length', array(':value', 6))
                        ->rule('password_confirm', 'matches', array(':validation', ':field', 'password'));
    }

    public function create_user($values, $expected) {
        // Validation for passwords
        $extra_validation = Model_User::get_password_validation($values)
                ->rule('password', 'not_empty');
        //Extend with extra validation
        foreach ($this->extra_rules() as $field => $rules) {
            $extra_validation->rules($field, $rules);
        }

        return $this->values($values, $expected)->create($extra_validation);
    }

    public function update_user($values, $expected = NULL) {
        if (empty($values['password'])) {
            unset($values['password'], $values['password_confirm']);
        }

        // Validation for passwords
        $extra_validation = Model_User::get_password_validation($values);
        //Extend with extra validation
        foreach ($this->extra_rules() as $field => $rules) {
            $extra_validation->rules($field, $rules);
        }
        return $this->values($values, $expected)->update($extra_validation);
    }

}

// End User Model

//View Create

<div class="title"><?= __('Registration') ?></div>
<div class="register">
    <?php
    $username = Arr::path($errors, 'username');
    $email = Arr::path($errors, 'email');
    $password = Arr::path($errors, '_external.password');
    $password_confirm = Arr::path($errors, '_external.password_confirm');
    $terms = Arr::path($errors, 'terms');
    echo Debug::vars($errors); //no terms errors displayer
    ?>
    <ul class="error">
        <?php if ($username != NULL)
             ?>
        <li><?= $username ?></li>
        <?php if ($email != NULL)

            ?>
        <li><?= $email ?></li>
        <?php if ($password != NULL)

            ?>
        <li><?= $password ?></li>
    <?php if ($password_confirm != NULL)

        ?>
        <li><?= $password_confirm ?></li>
    <?php if ($terms != NULL)

        ?>
        <li><?= $terms ?></li>
    </ul>
    <?= Form::open(I18n::$lang . '/user/create') ?>
    <?= Form::label('username', __('Username') . ' :') ?>
    <?= Form::input('username', HTML::chars(Arr::get($_POST, 'username'))) ?>
    <?= Form::label('password', __('Password') . ' :') ?>
    <?= Form::password('password', HTML::chars(Arr::get($_POST, 'password'))) ?>
    <?= Form::label('password_confirm', __('Password Confirm') . ' :') ?>
    <?= Form::password('password_confirm', HTML::chars(Arr::get($_POST, 'password_confirm'))) ?>
    <?= Form::label('email', __('E-Mail') . ' :') ?>
    <?= Form::input('email', HTML::chars(Arr::get($_POST, 'email'))) ?>
    <?= Form::label('terms', HTML::anchor(I18n::$lang . '/page/terms_an_conditions', __('Accept terms and conditions') . '?')) ?>
    <?= Form::hidden('terms', 'off') ?>
    <?= Form::checkbox('terms') ?>
    <?= Form::submit('register', __('Register'), array('class' => 'window button registerButton')) ?>
    <?= Form::close() ?>
</div>