[Bug 288842] New: Tags not deleted from XMP, using Tag-Side-View on the left

[Peter Albrecht-2]

https://bugs.kde.org/show_bug.cgi?id=288842

           Summary: Tags not deleted from XMP, using Tag-Side-View on the
                    left
           Product: digikam
           Version: 2.3.0
          Platform: Gentoo Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Tags
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:           2.3.0 (using KDE 4.7.3)
OS:                Linux

Using the tag-view on the left side of the screen does not remove the tag from
the xmp container in the file.


Reproducible: Always

Steps to Reproduce:
1. Assign three tags to a picture: A, B and C
2. open the tag view on the left screen side
3. select tag "B"
   -> you can see your picture in the middle part of the screen
4. rightclick tag "B" on the left side, select "Delete Tag" and confirm
deletion
   -> the tag in the left view disappears
5. select tag "A" in the left view to see the picture again
6. select the picture in the middle view
7. have a look at "Metadata -> XMP" on the right side:
   you can see "digiKam schema -> Tags List -> A, B, C"   (Tag not deleted from
XMP-Data)
8. now choose: "Image -> Reread metadata from image"
   -> tag "B" appears in the tag-view on the left side again

Actual Results:  
After step 4. the tag "B" is still present in the XMP part of the JPEG. Also
confirmed with a hex editor.

Expected Results:  
After step 4. the tag should have been removed from the XMP container.

I use "Metadata Writing Mode: Write to image only".

The tags seem to be removed from sqldb, since digikam does not show them
anywhere in it's GUI. But I have not looked at the database.

Tags are also _not_ removed from XMP-data in the file, if you reorganise your
tags via drag'n'drop in the tag-view on the left side.

This bug seems to reside in digikam since 1.1.0. With this version I did some
reorganisation as mentioned above and created some "ghost-tags" in June 2011.

Using the "Caption/Tags" view on right-side to remove tags, works fine.

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=288842


Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Tags                        |Metadata




--- Comment #1 from Gilles Caulier <caulier gilles gmail com>  2011-12-13 05:41:06 ---
If you delete tag from tag view (left sidebar), until you sync file Metadata
with Database using batch tool from Tools menu (option "Write Metadata to aLl
images"), image metadata will not be updated.

I know that Marcel work on this subject to process metadata in background when
database content is changed outside right sidebar, or when digiKam is closed. I
see some commits about between 2.3.0 and 2.4.0... LightRoom or Aperture work
like this, especially when applications are closed : there are a process dialog
to sync file metadata with DB.

Gilles Caulier

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[Peter Albrecht-2]

https://bugs.kde.org/show_bug.cgi?id=288842





--- Comment #2 from Peter Albrecht <px79 crazymonkeys de>  2011-12-14 20:48:18 ---
Hi Gilles,

I'm going to try digikam 2.4.0 the next days (have to install first). But for
now, some further investigations with digikam 2.3.0 (according to your post):

A)
 1. assign tag A to picture01
 2. delete tag A in the left sidebar
 3. from menu: "Image" -> "Write Metadata to Image"
 => tag A still in picture01's XMP :(

 + an empty tag "" is written to picture01's XMP
 => from menu: "Image" -> "Reread Metadata from Image" shows a tag "My Tags" in
the pictures tool tip (bad thing, since this will be hard to remove from the
file's XMP again)

B)
 1. assign tag B to picture02
 2. delete tag B in the right sidebar
 => no difference to deleting from left sidebar

-----------------------------------------------------------
Workaround for deleting a tag:
 1. filter with tag in left sidebar
 2. select all images
 3. remove tag in right sidebar
 4. delete tag in left (right sidebar is disabled with no images selected)

Move/Rename can be done:
 1. create new tag
 2. filter with old tag in left sidebar
 3. select all images
 4. assign new tag
 5. remove old tag in right sidebar
 6. delete old tag

Since I don't have to delete/rename/move tags in the tag tree very often, I can
live with this workaround. But you have to be aware of this pitfall.

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[Peter Albrecht-2]

https://bugs.kde.org/show_bug.cgi?id=288842





--- Comment #3 from Peter Albrecht <px79 crazymonkeys de>  2011-12-18 08:45:58 ---
I've checked this bug with digiKam 2.4.1 and KDE 4.7.3:

=> It is still valid! No difference to digiKam 2.3.0. Same behavior.


Rating this bug: (You can work around all the problems that may occur from this
bug)

In my opinion, having some old tags lingering hidden in your images and popping
out some time in the future is not nice, but it is not critical either. You
just delete them again, when you find them, and everything is ok.

Having an empty tag ("") been written to the picture's XMP data (see comment
#2), can be healed the following way:
 1. Search for all pictures in your collection ;)
 2. in thumbnail-view select all
 3. right-click one of them
 4. choose: "Remove Tag" -> "" (the empty tag)

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[Peter Albrecht-2]

https://bugs.kde.org/show_bug.cgi?id=288842





--- Comment #4 from Peter Albrecht <px79 crazymonkeys de>  2011-12-18 08:57:44 ---
(In reply to comment #1)
> I know that Marcel work on this subject to process metadata in background when
> database content is changed outside right sidebar, or when digiKam is closed. I
> see some commits about between 2.3.0 and 2.4.0

Reading this, I think about a syncing tool, which tells you: "Hey,
'picture001.jpg' has tags 'A', 'C' and 'D' set in its XMP-Data, but tags 'A',
'B' and 'C' set in your digiKam-DB. Do you want to:
 1. copy the tags from file's XMP to digiKam-DB
 2. copy the tags from digiKam-DB to file's XMP
 3. write the intersecting set ('A' and 'C') to both digiKam-DB and file's XMP
 4. write the union set ('A', 'B', 'C' and 'D') to both digiKam-DB and file's
XMP

But I could not find such a tool in digiKam's main menu. (Explicit Sync)
Closing digiKam, manipulating a file's XMP tags outside digikam and starting
digiKam again also did not bring up such a dialog or change the tags in
digiKam's DB. (Automatic Sync)

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[Peter Albrecht-2]

https://bugs.kde.org/show_bug.cgi?id=288842





--- Comment #5 from Peter Albrecht <px79 crazymonkeys de>  2011-12-18 09:06:39 ---
(In addition to comment #4)
Please don't misunderstand me: Comment #4 was not meant as an accuse. I just
thought this syncing mentioned by Gilles would be great, so I tried to trigger
it.

The result: It does not seem to be release/activated yet.

And as great fan of open source, I wanted to share this result.

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[Peter Albrecht-2]

https://bugs.kde.org/show_bug.cgi?id=288842





--- Comment #6 from Peter Albrecht <px79 crazymonkeys de>  2011-12-18 09:12:16 ---
(In reply to comment #1)
> If you delete tag from tag view (left sidebar), until you sync file Metadata
> with Database using batch tool from Tools menu (option "Write Metadata to aLl
> images"), image metadata will not be updated.

To be complete:
Working on my test-system with a smaller digiKam-collection, I tried the
solution "Tools" -> "Write Metadata to all images".
This gave exactly the same result as written in comment #2. I would have been
surprised by "Tools -> Write Metadata to all images" being implemented
differently to "Image -> Write Metadata to image"

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[Marcel Wiesweg]

https://bugs.kde.org/show_bug.cgi?id=288842

Marcel Wiesweg <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #7 from Marcel Wiesweg <[hidden email]> ---
Old problem, solution is not trivial

*** This bug has been marked as a duplicate of bug 268688 ***

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=288842

Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[hidden email]

--- Comment #8 from Gilles Caulier <[hidden email]> ---
Yes, Marcel : old problem, and old discussion...

Some people want to preserve old tags, some other no. Personally, i prefer to
have the strict duplication of tags between DB and image metadata.

Perhaps the ultimate solution is to provide an option in metadata panel for
this behavior. What do you think about ?

Gilles Caulier

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