protected function submitEditCity()
    {
        if ($this->isPosted('delete')) {
            $this->deleteCity();
        } else if ($this->isPosted('save') && $this->validateEditCity()) {
            if (isset($this->data_city['city_id'])) {
                $this->updateCity();
            } else {
                $this->addCity();
            }
        }
    }