[Digikam-devel] [Bug 277169] New: digiKam: face tag/tag region: only the last created face tag of multiple face tags is saved / no face tag is saved if cancel is hit on the last created face tag

[Felix Leif Keppmann]

https://bugs.kde.org/show_bug.cgi?id=277169

           Summary: digiKam: face tag/tag region: only the last created
                    face tag of multiple face tags is saved / no face tag
                    is saved if cancel is hit on the last created face tag
           Product: digikam
           Version: 2.0.0
          Platform: Gentoo Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Tags
        AssignedTo: digikam-devel at kde.org
        ReportedBy: felix.leif at keppmann.de


OS: Gentoo amd64
Version digiKam: 2.0.0_rc

Reproducible:
Always

Steps to reproduce:
A1) Add two face tags to an photo
A2) Switch to another photo and back

B1) Add one face tag to a photo
B2) Add a second one but click "cancel" instead of confirm
B3) Switch to another photo and back

Expected result:
A) Two face tags/tag regions
B) One face tag/tag region (the first one)

Actual result:
A) One face tag/tag regions (the one created at last)
B) No face tag/tag region


While testing the face tag functionality (as well as detection/recognition) i
recognized that pictures which got two (maybe also more) face tags, lost all
face tags but the last [time] one. All "normal" tags in the /People/NAME
hierarchy where still available.

After some investigation in the database i found the tag regions stored in the
"ImageTagProperties" table, e.g.
imageid     tagid     property                    value
11504         24         tagRegion                    <rect x="1292" y="1039"
width="222" height="297"/>

The name is stored in the "TagProperties" AFAIK.

If i add a new face tag first a temporary line in "ImageTagProperties" is
created:
imageid     tagid     property                    value
11504         24         tagRegion                    <rect x="1292" y="1039"
width="222" height="297"/>
11504         -1         autodetectedFace    <rect x="1429" y="1163"
width="188" height="240"/>

The temporary tag region is persistent as long as i don't enter a name and
confirm the tag (region).
If i confirm the tag (region) in digiKam only the new tag (region) is
persistent in the database, the old one is deleted.
imageid     tagid     property                    value
11504         25         tagRegion                    <rect x="1429" y="1163"
width="188" height="240"/>

If i hit "cancel" at the current temporary tag in digiKam, both lines are
deleted, the temporary as well as the old tag region.
If i hit two face tags at last with the same name, both are saved, but not the
face tags i added before.

I guess this is not the intended behavior, would expect two tag regions.
Tag regions are both visible in digiKam as long as i switch to another photo
and back.

The behavior is reproducible.

Does somebody can confirm this? Or maybe knows the responsible code snippet?

(Tag regions/face tags are also not embedded in the metadata of files like
normal tags, only mentioned here, that is another bug/missing feature)

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