public static function get_slug()
{
$main = date('ymd');
$suffix = '';
$slug = $main . $suffix;
$max = \Config::get('news.max_articles_per_day');
$i = 0;
while (Model_News::check_exists4slug($slug)) {
if ($i > $max) {
throw \FuelException('Posted news exceeded the limit on par day.');
}
$suffix = \Util_string::get_next_alpha_str($suffix);
$slug = $main . $suffix;
$i++;
}
return $slug;
}