Ako upraviť formulár, aby pri disablovanej hodnote po submite vracal defaultValue?

Toto je len jeden z úplne jednoduchých formulárov, ale dôvod prečo sa to pýtam je, že mám oveľa väčší zložitejší formulár, ktorý ma veľa pravidiel na disablovanie inputov. Potom to zakaždým musím ošetrovať v modeli, či dané property vo values existujú. Nedá sa formulár nejako nastaviť tak, aby som mal po submite v modeli vždy všetky properties zo všetkých inputov aj disablovaných s tým, že ak budú disablované, vráti to default value? Potom by som mohol rovno inserovať/updatovať values z formulara bez toho aby som musel každú jednu hodnotu kontrolovať, či existuje? Príklad:

Formulár:

<?php

use Nette\Application\UI,
    Nette\Database\Context,
    Kdyby\Translation\Translator,
    Nette\Security\User,
    App\Model;

class UserFormFactory extends UI\Control
{
    /** @var Context */
    private $context;

    /** @var Translator */
    private $translator;

    /** @var User */
    private $user;

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

    /** @var Model\UserGroupsModel */
    private $mGroups;

    /** @var Model\UsersModel */
    private $mUsers;

    /**
     * Constructor.
     *
     * @param Context $context
     * @param Translator $t
     * @param User $u
     */
    public function __construct(Context $context, Translator $t, User $u)
    {
        $this->context = $context;
        $this->translator = $t;
        $this->user = $u;

        $this->mUsers = new Model\UsersModel($this->context);
        $this->mGroups = new Model\UserGroupsModel($this->context, $this->user);
    }

    /**
     * Method id
     *
     * @param $id
     * @return $this
     */
    public function id($id)
    {
        $this->id = $id;
        return $this;
    }

    /**
     * createComponentForm method.
     *
     * @return UI\Form
     */
    public function createComponentForm()
    {
        $form = new UI\Form;
        $t = $this->translator;

        $disabled = $this->user->isInRole('administrators') ? false : true;

        $form->getElementPrototype()->addAttributes(['id' => 'userForm', 'class' => 'k-form']);

        $form->addText('sign', $t->translate('users.items.sign') . ':');

        $form->addText('firstname', $t->translate('users.items.firstname') . ':')
            ->setRequired(true)
            //->addRule(UI\Form::PATTERN, $t->trans('form.validator.pattern'), '^\p{L}+$')
            ->addRule(UI\Form::MIN_LENGTH, $t->translate('form.validator.more', array(1)), 1);

        $form->addText('middlename', $t->translate('users.items.middlename') . ':')
            ->setRequired(false)
            //->addRule(UI\Form::PATTERN, $t->trans('form.validator.pattern'), '^\p{L}+$')
            ->addRule(UI\Form::MIN_LENGTH, $t->translate('form.validator.more', array(1)), 1);

        $form->addText('lastname', $t->translate('users.items.lastname') . ':')
            ->setRequired(true)
            //->addRule(UI\Form::PATTERN, $t->trans('form.validator.pattern'), '^\p{L}+$')
            ->addRule(UI\Form::MIN_LENGTH, $t->translate('form.validator.more', array(1)), 1);

        .....

        $department_id = $form->addSelect('department_id', $t->translate('users.items.department_id') . ':',
            (new Model\BaseListModel($this->context, $this->user))
                ->setTableName('app_user_departments')
                ->fetchPairs())
            ->setPrompt('');

        $is_department_leader = $form->addCheckbox('is_department_leader', $t->translate('users.items.is_department_leader') . ':');

        $form->addProtection();

        if ($disabled) {
            $department_id->setDisabled(true);
            $group_id->setDisabled(true);
            $is_department_leader->setDisabled(true);
            if (!$this->id) {
                $department_id->setDefaultValue($this->user->identity->department_id);
                $group_id->setDefaultValue(2);
                $is_department_leader->setDefaultValue(false);
            }
        }

        if ($this->id) {
            $data = $this->mUsers->getUser($this->id);
            $form->setDefaults($data);
        }

        // Validate form
        $form->onValidate[] = function ($form) {
            $data = $form->getValues();
            $t = $this->translator;

            // Check, if username already exists
            if ($data->login) {
                if ($this->mUsers->checkUserExists($data->login, $this->id)) {
                    $form['login']->addError($t->translate('form.validator.login_exits'));
                }
            }

            if (strlen($data->password) > 0) {
                if (strlen($data->password) < 5) {
                    $form['password']->addError($t->translate('form.validator.more', array(5)));
                } else {
                    if ($data->password != $data->password_verify) {
                        $form['password']->addError($t->translate('form.validator.pswd_not_match'));
                        $form['password_verify']->addError($t->translate('form.validator.pswd_not_match'));
                    }
                }
            } elseif (!$this->id) {
                $form['password']->addError($t->translate('form.validator.required'));
            }
        };

        // Submit form
        $form->onSuccess[] = [$this, 'success'];

        $form->onError[] = function () {
            if ($this->presenter->isAjax()) {
                $this->redrawControl('form');
            }
        };

        return $form;
    }

    /**
     * success method.
     *
     * @param $form
     */
    public function success($form)
    {
        $data = $form->getValues();

        if ($this->id) {
            $data->id = $this->id;
        } elseif (!$this->user->isInRole('administrators')) {
            $data->group_id = 2;
            $data->department_id = $this->user->identity->department_id;
            $data->is_department_leader = false;
        }

        try {
            $this->mUsers->saveUser($data);

            if ($this->id) {
                $this->presenter->flashMessage($this->translator->translate('users.items.updated'), 'success');
            } else {
                $this->presenter->flashMessage($this->translator->translate('users.items.created'), 'success');
            }

            $this->presenter->redirectBack();

        } catch (\PDOException $ex) {
            $this->presenter->flashMessage($ex->getMessage(), 'error');
            $this->presenter->redrawControl('flash');
        }
    }

    /**
     * render method.
     */
    public function render()
    {
        $this->template->setFile(__DIR__ . '/UserFormFactory.latte');
        $this->template->render();
    }
}

/**
 * Interface IUserFormFactory
 */
interface IUserFormFactory
{
    /**
     * create method.
     *
     * @return UserFormFactory
     */
    public function create();
}

Model:

public function saveUser($data)
    {
        $d = array(
            self::COLUMN_SIGN => $data->sign,
            self::COLUMN_FIRSTNAME => $data->firstname,
            self::COLUMN_MIDDLENAME => $data->middlename,
            self::COLUMN_LASTNAME => $data->lastname,
            self::COLUMN_FULLNAME => $this->renderFullname($data->firstname, $data->lastname),
            self::COLUMN_LOGIN => $data->login,
            self::COLUMN_EMAIL => $data->email,
            self::COLUMN_EMAIL_SEND => $data->email_send,
            self::COLUMN_BLOCK => $data->block,
            self::COLUMN_LANG_ID => $data->lang_id,
            self::COLUMN_MAX_SATURATION => $data->max_saturation
        );

        if (isset($data->group_id)) {
            $d[self::COLUMN_GROUP_ID] = $data->group_id;
        }
		// Da sa tomuto nejako vyhnut, ze ked tato polozka bude disablovana, vrati defaultValue?
        if (isset($data->department_id)) {
            $d[self::DEPARTMENT_ID] = $data->department_id;
        }

		// Da sa tomuto nejako vyhnut, ze ked tato polozka bude disablovana, vrati defaultValue?
        if (isset($data->is_department_leader)) {
            $d[self::IS_DEPARTMENT_LEADER] = $data->is_department_leader;
        }

		// Da sa tomuto nejako vyhnut, ze ked tato polozka bude disablovana, vrati defaultValue?
        if (!empty($data->password)) {
            $d[self::COLUMN_PASSWORD] = hash('sha1', $data->password);
        }

        if (!empty($data->id)) {
            $this->context->table(self::TABLE_NAME)
                ->where(self::TABLE_ID, $data->id)
                ->update($d);
        } else {
            $d[self::COLUMN_REGISTER_DATE] = date('Y-m-d H:i:s');
            return $result = $this->context->table(self::TABLE_NAME)
                ->insert($d)
                ->id;
        }