node-mysql issue table schema

table schema

CREATE TABLE IF NOT EXISTS `friends` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL,
  `to_id` int(11) NOT NULL,
  `relation_id` text,
  `created_at` datetime DEFAULT NULL,
  `updated_at` datetime DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `index_friends_on_user_id` (`user_id`),
  KEY `index_friends_on_to_id` (`to_id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=8 ;

--
-- Dumping data for table `friends`
--

INSERT INTO `friends` (`id`, `user_id`, `to_id`, `relation_id`, `created_at`, `updated_at`) VALUES
(1, 1, 2, '0', NULL, NULL),
(2, 2, 1, '0', NULL, NULL),
(6, 1, 3, '0', NULL, NULL),
(7, 3, 1, '0', NULL, NULL);