private static function init()
{
self::$enums = DB::select()->from('enumerations')->execute()->as_array('id');
$result = DB::select()->from('enumeration_values')->order_by('value', 'asc')->execute()->as_array();
self::$values = array();
foreach ($result as $value) {
self::$values[$value['enum_id']][$value['value']] = $value['value'];
}
}
