こんにちは、テーブル メッセージとクエリに問題があります。会話 (conversation_id) の最初のメッセージごとに新しいメッセージを合計で選択することはできません。これが私のテーブル構造です：
id、parent_id、sender_id、recipient_id、title、body、conversation_id、status
これが私のSQLクエリです：
SELECT * FROM messages AS m
LEFT JOIN (
SELECT id as total_last_id, parent_id as total_parent_id, count(*) as total
FROM messages WHERE recipient_id = 2 OR sender_id = 2 group by parent_id) as cm
ON total_parent_id = m.id
LEFT JOIN (
SELECT id as new_last_id, created as new_last_created, parent_id as new_parent_id, SUM(status) as new FROM messages
WHERE recipient_id = 2 group by parent_id) as new
ON new_parent_id = m.id WHERE m.recipient_id = 2
GROUP BY m.conversation_id, m.parent_id HAVING (m.parent_id is null) ORDER BY m.created DESC
ここに私のダンプがあります：
DROP TABLE IF EXISTS `messages`;
CREATE TABLE IF NOT EXISTS `messages` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`parent_id` int(11) DEFAULT NULL,
`lft` int(11) DEFAULT NULL,
`rght` int(11) DEFAULT NULL,
`sender_id` varchar(36) NOT NULL,
`recipient_id` varchar(36) NOT NULL,
`title` varchar(1024) NOT NULL,
`body` text,
`readers` text COMMENT 'a serialized list of user ids that have read this message',
`status` tinyint(1) NOT NULL DEFAULT '1',
`is_archived` tinyint(1) NOT NULL DEFAULT '0',
`creator_id` int(11) NOT NULL,
`modifier_id` int(11) NOT NULL,
`conversation_id` int(11) NOT NULL DEFAULT '0',
`created` datetime DEFAULT NULL,
`modified` datetime DEFAULT NULL,
`deleted` datetime DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `all___` (`parent_id`,`lft`,`rght`,`sender_id`,`recipient_id`,`creator_id`,`modifier_id`,`conversation_id`,`status`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=1;
サンプルデータ：
INSERT INTO `messages` (`id`, `parent_id`, `lft`, `rght`, `sender_id`, `recipient_id`, `title`, `body`, `readers`, `status`, `is_archived`, `creator_id`, `modifier_id`, `conversation_id`, `created`, `modified`, `deleted`) VALUES
(291, 274, 36, 37, '41', '51', 'child 274', NULL, NULL, 0, 0, 41, 0, 2, '2013-10-31 06:05:23', '2013-10-31 06:05:23', NULL),
(290, 270, 18, 19, '41', '51', 'Parent id 270 ', NULL, NULL, 0, 0, 41, 0, 1, '2013-10-31 06:04:09', '2013-10-31 06:04:09', NULL),
(287, 283, 51, 52, '41', '51', 'test', NULL, NULL, 0, 0, 41, 0, 3, '2013-10-31 05:46:54', '2013-10-31 05:46:54', NULL),
(288, 280, 54, 55, '41', '51', 'test', NULL, NULL, 0, 0, 41, 0, 3, '2013-10-31 05:49:55', '2013-10-31 05:49:55', NULL),
(289, 273, 13, 14, '41', '51', 'c of 273', NULL, NULL, 0, 0, 41, 0, 1, '2013-10-31 05:59:56', '2013-10-31 05:59:56', NULL),
(286, 283, 49, 50, '41', '51', 'test', NULL, NULL, 0, 0, 41, 0, 3, '2013-10-31 05:46:33', '2013-10-31 05:46:33', NULL),
(283, 280, 46, 53, '41', '51', 'test', NULL, NULL, 0, 0, 41, 0, 3, '2013-10-31 05:32:38', '2013-10-31 05:32:38', NULL),
(284, 283, 47, 48, '51', '41', 'test', NULL, NULL, 1, 0, 51, 0, 3, '2013-10-31 05:33:33', '2013-10-31 05:33:33', NULL),
(285, 270, 16, 17, '41', '51', 'parent id 270', NULL, NULL, 0, 0, 41, 0, 1, '2013-10-31 05:33:57', '2013-10-31 05:33:57', NULL),
(282, 280, 44, 45, '51', '41', 'test', NULL, NULL, 1, 0, 51, 0, 3, '2013-10-31 05:30:41', '2013-10-31 05:30:41', NULL),
(281, 280, 42, 43, '51', '41', 'test', NULL, NULL, 1, 0, 51, 0, 3, '2013-10-31 05:27:59', '2013-10-31 05:27:59', NULL),
(280, NULL, 41, 56, '41', '51', 'Fourth', NULL, NULL, 0, 0, 41, 0, 3, '2013-10-31 04:28:18', '2013-10-31 04:28:18', NULL),
(279, 273, 11, 12, '51', '41', 'of 273', NULL, NULL, 1, 0, 51, 0, 1, '2013-10-31 04:26:30', '2013-10-31 04:26:30', NULL),
(277, 274, 32, 33, '51', '41', '0', NULL, NULL, 1, 0, 51, 0, 2, '2013-10-31 04:12:07', '2013-10-31 04:12:07', NULL),
(278, 274, 34, 35, '41', '51', 'test', NULL, NULL, 0, 0, 41, 0, 2, '2013-10-31 04:12:55', '2013-10-31 04:12:55', NULL),
(273, 270, 10, 15, '41', '51', 'Parent', NULL, NULL, 0, 0, 41, 0, 1, '2013-10-31 02:54:23', '2013-10-31 02:54:23', NULL),
(274, NULL, 27, 40, '41', '51', 'Third', NULL, NULL, 0, 0, 41, 0, 2, '2013-10-31 03:07:02', '2013-10-31 03:07:02', NULL),
(272, 270, 6, 9, '51', '41', 'Second Second', NULL, NULL, 1, 0, 51, 0, 1, '2013-10-31 02:52:55', '2013-10-31 02:52:55', NULL),
(270, NULL, 1, 26, '41', '51', 'Second message', NULL, NULL, 0, 0, 41, 0, 1, '2013-10-31 00:05:16', '2013-10-31 00:05:16', NULL),
(271, 270, 2, 5, '51', '41', 'Answer 1', NULL, NULL, 0, 0, 51, 0, 1, '2013-10-31 00:06:21', '2013-10-31 00:06:21', NULL),
(292, 274, 38, 39, '41', '51', 'test', NULL, NULL, 1, 0, 41, 0, 2, '2013-10-31 06:11:35', '2013-10-31 06:11:35', NULL),
(295, 272, 7, 8, '41', '51', 'child of 272', NULL, NULL, 1, 0, 41, 0, 1, '2013-10-31 07:04:06', '2013-10-31 07:04:06', NULL),
(294, 270, 20, 21, '41', '51', 'parent 270, child second', NULL, NULL, 1, 0, 41, 0, 1, '2013-10-31 06:12:17', '2013-10-31 06:12:17', NULL),
(296, 270, 22, 23, '41', '51', 'child of 270', NULL, NULL, 1, 0, 41, 0, 1, '2013-10-31 07:05:30', '2013-10-31 07:05:30', NULL),
(297, 270, 24, 25, '41', '51', 'child of 270', NULL, NULL, 1, 0, 41, 0, 1, '2013-10-31 07:06:11', '2013-10-31 07:06:11', NULL),
(298, NULL, 57, 70, '41', '51', 'First message', NULL, NULL, 0, 0, 41, 0, 4, '2013-10-31 07:43:49', '2013-10-31 07:43:49', NULL),
(299, 298, 58, 59, '51', '41', 'test', NULL, NULL, 1, 0, 51, 0, 4, '2013-10-31 07:45:54', '2013-10-31 07:45:54', NULL),
(300, 298, 60, 67, '41', '51', 'test', NULL, NULL, 0, 0, 41, 0, 4, '2013-10-31 07:46:21', '2013-10-31 07:46:21', NULL),
(301, 300, 61, 62, '51', '41', 'test', NULL, NULL, 1, 0, 51, 0, 4, '2013-10-31 07:46:38', '2013-10-31 07:46:38', NULL),
(302, 300, 63, 64, '41', '51', 'test', NULL, NULL, 0, 0, 41, 0, 4, '2013-10-31 07:47:08', '2013-10-31 07:47:08', NULL),
(303, 298, 68, 69, '41', '51', 'test', NULL, NULL, 0, 0, 41, 0, 4, '2013-10-31 07:54:45', '2013-10-31 07:54:45', NULL),
(304, 300, 65, 66, '41', '51', 'test', NULL, NULL, 0, 0, 41, 0, 4, '2013-10-31 07:54:58', '2013-10-31 07:54:58', NULL);
主な問題は、間違った新しい合計メッセージを選択することです...ユーザーがクエリを実行すると、間違った新しいメッセージがカウントされます(クエリが実行されると、行の新しいカウントが会話の最初の行ごとに間違ってカウントされます(parent_id = null))...どうすればできますかこの問題を解決するか、テーブル メッセージ、会話、ユーザーを含むメッセージング プラグインの構造を編集する必要がありますか? 1つのテーブルで1つのSQLクエリが正しく機能すると思います...