Bug 407786

What happens if you use the tags:/ URL in Dolphin?

(In reply to Christoph Feck from comment #1)
> What happens if you use the tags:/ URL in Dolphin?
Nothing, but in the logs, I find (newest first):

jun 14 16:00:48 machine kdeinit5[9200]: kf5.kio.kio_tags: "tags:/" stat() invalid url
jun 14 16:00:48 machine kdeinit5[9200]: kf5.kio.kio_tags: tag fetch failed: "Failed to open the database"
jun 14 16:00:43 machine kdeinit5[9149]: kf5.kio.kio_tags: "tags:/" list() invalid url
jun 14 16:00:43 machine kdeinit5[9149]: kf5.kio.kio_tags: tag fetch failed: "Failed to open the database"
jun 14 16:00:43 machine kdeinit5[9200]: kf5.kio.kio_tags: "tags:/" stat() invalid url
jun 14 16:00:43 machine kdeinit5[9200]: kf5.kio.kio_tags: tag fetch failed: "Failed to open the database"

Can confirm the same error with Plasma 5.16.1, Framework 5.59.0, Qt 5.12.4

Same here, tags don't work anymore:

2019-06-27T11:19:24.512296+02:00 pc-linux plasmashell[2734]: file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/Task.qml:347: Unable to assign [undefined] to int
2019-06-27T11:19:24.512449+02:00 pc-linux plasmashell[2734]: file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/Task.qml:375: TypeError: Type error
2019-06-27T11:19:24.550596+02:00 pc-linux kwin_x11[2723]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 24682, resource id: 146800701, major code: 18 (ChangeProperty), minor code: 0
2019-06-27T11:19:26.177348+02:00 pc-linux kdeinit5[20788]: kf5.kio.core: Invalid URL: QUrl("")
2019-06-27T11:19:26.177531+02:00 pc-linux kdeinit5[20788]: message repeated 2 times: [ kf5.kio.core: Invalid URL: QUrl("")]
2019-06-27T11:19:26.374856+02:00 pc-linux kdeinit5[23248]: kf5.kio.core: Invalid URL: QUrl("")
2019-06-27T11:19:26.385746+02:00 pc-linux kdeinit5[23248]: message repeated 5 times: [ kf5.kio.core: Invalid URL: QUrl("")]
2019-06-27T11:19:29.214088+02:00 pc-linux plasmashell[2734]: KActivitiesStats( 0x5642a397d590 ) ResultModelPrivate::onResultScoreUpdated  result added: "/home/linux" score: 40269.8 last: 1561627015 first: 1556530854

Operating System: openSUSE Tumbleweed 20190623
KDE Plasma Version: 5.16.1
KDE Frameworks Version: 5.59.0
Qt Version: 5.12.3
Kernel Version: 5.1.7-1-default
OS Type: 64-bit
Processors: 4 × Intel® Core™ i5-4590 CPU @ 3.30GHz
Memory: 15,5 GiB

Now it works again! Haven't changed anything. Strange

Ok... The reason in my case is that I disabled Baloo and it turned out that the tag function relies on Baloo to work. (Well, it seems that there are actually 2 flavours: the xattr implementation, which relies on Baloo; the Nepomuk custom database implementation, which doesn't need Baloo but was unstable hence deprecated. Correct me if I misunderstood something.)

Please ensure you have the baloo*-file package installed. The packaging schema could differ on your distro, so it's whatever package that has these files:
/usr/bin/baloo_file
/usr/bin/baloo_file_extractor
/usr/bin/balooctl

Perhaps we should look into improving the error/log message, make it suggest installing the needed baloo* package(s).

(In reply to Ahmad Samir from comment #7)
> Please ensure you have the baloo*-file package installed.
These are installed.

(In reply to Frederick Zhang from comment #6)
> Ok... The reason in my case is that I disabled Baloo and it turned out that
> the tag function relies on Baloo to work.
And this turns out to also be the reason for me.

(In reply to Ahmad Samir from comment #7)
> Perhaps we should look into improving the error/log message, make it suggest
> installing the needed baloo* package(s).
Well, I think it should at least mention baloo. Perhaps at the end ‘(Is baloo inactive?)’ or something like that. I suggest closing this bug once the log messages have been improved.

(In reply to Christoph Feck from comment #1)
> What happens if you use the tags:/ URL in Dolphin?
Nothing, even though I added a tag to a file and force-indexed that file.

(In reply to Erik Quaeghebeur from comment #8)
> (In reply to Ahmad Samir from comment #7)
> > Please ensure you have the baloo*-file package installed.
> These are installed.
> 

I don't usually have baloo enabled, so I got the messages mixed up. There are two places where the log messages are coming from:
- "Failed to open the database", baloo is properly installed but isn't enabled:
https://phabricator.kde.org/D25421

- kio_tags complaining about not being able to open "tags:/" this could be caused by not having baloo-file package installed.

(In reply to Ahmad Samir from comment #9)
> - kio_tags complaining about not being able to open "tags:/" this could be
> caused by not having baloo-file package installed.
I had both that message and the package installed (but disabled). Enabling baloo has eliminated both types of errors.

(In reply to Erik Quaeghebeur from comment #10)
> (In reply to Ahmad Samir from comment #9)
> > - kio_tags complaining about not being able to open "tags:/" this could be
> > caused by not having baloo-file package installed.
> I had both that message and the package installed (but disabled). Enabling
> baloo has eliminated both types of errors.

I meant kio.core that was complaining (not kio_tags).

With a fresh user account:
- Baloo is enabled by default
- Make sure baloo5-file isn't installed then open dolphin from terminal:
kf5.kio.core: "Couldn't enter folder tags:/"