Question

我有一个文件夹表，其中我存储目录路径，深度，parentId，标题等，

我有像这样的文件夹结构

/
/services
/products
again product has some children directories
/products/computers
and computers has some children directories
/products/computers/desktop
/products/computers/laptop etc,.

如果想让/products成为/services的孩子，它应该会变成这样

/services/products
/services/products/computers
/services/products/computers/desktop
/services/products/computers/desktop etc,.

我尝试过以下查询，我可以更新单个级别，但不能更新后续子级

SELECT 
GROUP_CONCAT(f.id),
f.nav_depth
INTO
@ids, @depth
FROM folders f
JOIN (SELECT f1.id,
f1.parent__id 
FROM folders f1
WHERE f1.directory_path REGEXP '^/products') ta ON ta.id = f.id;

UPDATE folders
SET 
directory_path = CONCAT(parentPath,'/',title),
parent__id = 2,
nav_depth = parentnavdepth+1
WHERE id IN (@ids);

表格结构

CREATE TABLE `folders` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `date_created` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE   CURRENT_TIMESTAMP,
  `directory_path` tinytext,
  `nav_depth` tinyint(3) DEFAULT '0',
  `parent__id` bigint(20) DEFAULT NULL,
  `resource_id` varchar(36) DEFAULT NULL,
  `title` varchar(128) DEFAULT NULL,
  `user__id` bigint(20) DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `UK_ltal9g0512nekqfp83u5l1huo` (`parent__id`),
  KEY `UK_cuff3r728xl6ynlp3u1dr5vt9` (`nav_depth`)
) ENGINE=InnoDB AUTO_INCREMENT=14 DEFAULT CHARSET=latin1;

here is the link for table with data

Answer 1

我怀疑你可能一直在思考它。您可以像这样更新目录路径：

update folders set directory_path = concat('/services', directory_path), nav_depth = nav_depth + 1 
  where directory_path = '/products' 
    or directory_path like '/products/%';

您必须在第二个查询中更新新的'/ services / products'路径的parent_id。

我不知道这会比

更难

update folders set parent__id = 2
  where directory_path = '/services/products';

edited fiddle

如何更新父级和后续子级值

1 个答案: