（mysql）数据库迁移难度从digikam 4. *迁移到5. *

Question

我有！用digikam管理的价值十年的标签照片和我的debian稳定/测试组合最近升级至digikam 5. *。

我现在面临的问题是，在尝试升级到更新的数据库方案（v.8）时，持有爱情劳动的（mysql）数据库似乎给出了问题。 。

当开始的digiKam V5 *指着4 * - 使用的后台数据库，我得到以下几点：

digikam.dbengine: Loading SQL code from config file "/usr/share/digikam/database/dbconfig.xml" 
digikam.dbengine: Checking XML version ID => expected: 3 found: 3 
digikam.coredb: Core database: running schema update 
digikam.coredb: Core database: have a structure version 7 
digikam.coredb: Core database: makeUpdates 7 to 8 
digikam.dbengine: Failure executing query: 
"" 
Error messages: "QMYSQL: Unable to execute query" "Can't DROP 'Albums_AlbumRoots'; check that column/key exists" 1091 2 
Bound values: () 
digikam.dbengine: Error while executing DBAction [ "UpdateSchemaFromV7ToV8" ] Statement [ "ALTER TABLE Albums\n          DROP FOREIGN KEY Albums_AlbumRoots;" ] 
digikam.coredb: Core database: schema update to V 8 failed! 
digikam.coredb: Core database: cannot process schema initialization 

当明确尝试使用纳入5.数据库迁移工具*我结束了在下面的图像中显示的错误：

任何人都可以帮助解释这里发生了什么，分别是如何解决它？

荷兰Joh

Answer 1

我有同样的问题，由于我的旧分贝一些不一致的地方。修复这些（主要是删除一些死亡引用）之后，升级就完成了。我似乎还有其他问题，但可能与db无关。

这将显示您的问题（应该都是除了根标签空）：

从https://bugs.kde.org/show_bug.cgi?id=355831#c73

select * from Images where album not in (select Albums.id from Albums); 
select id, icon from Albums where icon != 0 and icon not in (select id from Images); 
select * from Albums where Albums.albumRoot not in (select AlbumRoots.id from AlbumRoots); 
select * from ImageHaarMatrix where imageid not in (select id from Images); 
select * from ImageInformation where imageid not in (select id from Images); 
select * from ImageMetadata where imageid not in (select id from Images); 
select * from VideoMetadata where imageid not in (select id from Images); 
select * from ImagePositions where imageid not in (select id from Images); 
select * from ImageComments where imageid not in (select id from Images); 
select * from ImageCopyright where imageid not in (select id from Images); 
select * from Tags where pid != 0 and pid not in (select id from Tags); 
select id, icon from Tags where icon != 0 and icon not in (select id from Images); 
select * from ImageTags where tagid not in (select id from Tags); 
select * from ImageTags where imageid not in (select id from Images); 
select * from ImageProperties where imageid not in (select id from Images); 
select * from ImageHistory where imageid not in (select id from Images); 
select * from ImageRelations where subject not in (select id from Images); 
select * from ImageRelations where object not in (select id from Images); 
select * from ImageTagProperties where imageid not in (select id from Images); 
select * from TagProperties where tagid not in (select id from Tags); 
select * from ImageTagProperties where tagid not in (select id from Tags); 

采取还有，从源头上找到一个修复脚本。

我刚才得知，5.2.0已经发布两天了！

Answer 2

（有一个很难从Debian的喘息迁移到Debian的拉伸，希望这可以帮助别人...）

这为我工作：

• 确保的digiKam没有运行

• 将您的旧配置文件从~/.kde/share/config/digikamrc复制到~/.config/digikamrc

• 打开您的带有一些sqlite编辑器的数据库文件（例如digikam4.db） sqlitebrowser）

• 编辑表AlbumRoots和固定在斜线标识符柱（即更换/的%2F所有实例）

  UPDATE AlbumRoots 
  SET identifier = replace(identifier, '%2F', '/') 
  WHERE identifier LIKE '%%%2F%'; 
  

• 保存数据库

• 交叉手指（可选，但推荐）

• 开始的digiKam

祝你好运！