Hi,
sorry for the late reply, I was a bit busy. Yes, pixls.us will probably
give you more 'developer eyes' to check the problem. It's probably a big,
so I would be prepared to file one on GitHub.
Best regards,
Guillermo

On Thu, Jul 27, 2023, 06:21 Dusenberg <dusenb...@gmx.co.uk> wrote:

> I have posted this on pixls.us now it is back up.
> Dusenberg
>
> On 26/07/2023 20:39, Dusenberg wrote:
>
> Guillermo
>
> Since my last post, I have extracted data from the dt db image table for
> the image and versions concerned from three backup instances of the dt
> database going back 3 years:
>     a) 2020-12-14 - pre-dt3.4.0, closest I can get to the original shot
> date
>     b) 2023-07-22 - dt4.2.1, before new duplicate created
>     c) 2023-07-24 - dt4.2.1, after new duplicate created showing duplicate
> version '****'
>
> Hope this sheds more light on the issue.
>
> pre-dt3.4.0-library.db from backup archive 2020-12-14
> ------------------------------------------------------
> select key, value from db_info;
> key    value
> version    30
>
> select id, group_id, film_id,filename,version,max_version from images
> where filename = "20200325_BonallyWoods_NIK_1413.NEF" order by id;
>
> id    group_id    film_id    filename                        version
> max_version
> 3574    3574    135    20200325_BonallyWoods_NIK_1413.NEF    0    7
> 3578    3574    135    20200325_BonallyWoods_NIK_1413.NEF    1    7
> 3582    3574    135    20200325_BonallyWoods_NIK_1413.NEF    2    7
> 3583    3574    135    20200325_BonallyWoods_NIK_1413.NEF    3    7
> 3789    3574    135    20200325_BonallyWoods_NIK_1413.NEF    4    7
> 3790    3574    135    20200325_BonallyWoods_NIK_1413.NEF    5    7
> 3791    3574    135    20200325_BonallyWoods_NIK_1413.NEF    6    7
> 3792    3574    135    20200325_BonallyWoods_NIK_1413.NEF    7    7
>
>
> library.db-snp-20230722155434 from backup archive BEFORE new duplicate
> created
>
> ------------------------------------------------------------------------------
> select key, value from db_info;
> key    value
> version    37
>
> select id, group_id, film_id,filename,version,max_version from images
> where filename = "20200325_BonallyWoods_NIK_1413.NEF" order by id;
>
> id    group_id    film_id    filename                    version
> max_version
> 3574    3574    135    20200325_BonallyWoods_NIK_1413.NEF    0    7
> 3578    3574    135    20200325_BonallyWoods_NIK_1413.NEF    1    7
> 3582    3574    135    20200325_BonallyWoods_NIK_1413.NEF    2    7
> 3583    3574    135    20200325_BonallyWoods_NIK_1413.NEF    3    7
> 3789    3574    135    20200325_BonallyWoods_NIK_1413.NEF    4    7
> 3790    3574    135    20200325_BonallyWoods_NIK_1413.NEF    5    7
> 3791    3574    135    20200325_BonallyWoods_NIK_1413.NEF    6    7
> 3792    3574    135    20200325_BonallyWoods_NIK_1413.NEF    7    7
>
>
> library.db-snp-20230724163328 from current backup AFTER new duplicate
> created
>
> -------------------------------------------------------------------------------
> select key, value from db_info;
> key    value
> version    37
>
> select id, group_id, film_id,filename,version,max_version from images
> where filename = "20200325_BonallyWoods_NIK_1413.NEF" order by id;
>
> id    group_id    film_id    filename                    version
> max_version
> 3574    3574    135    20200325_BonallyWoods_NIK_1413.NEF    0    0
> 3578    3574    135    20200325_BonallyWoods_NIK_1413.NEF    1    3
> 3582    3574    135    20200325_BonallyWoods_NIK_1413.NEF    2    3
> 3583    3574    135    20200325_BonallyWoods_NIK_1413.NEF    3    3
> ****duplicate
> 3789    3574    135    20200325_BonallyWoods_NIK_1413.NEF    4    3
> 3790    3574    135    20200325_BonallyWoods_NIK_1413.NEF    5    3
> 3791    3574    135    20200325_BonallyWoods_NIK_1413.NEF    6    3
> 3792    3574    135    20200325_BonallyWoods_NIK_1413.NEF    7    3
> 9744    3574    135    20200325_BonallyWoods_NIK_1413.NEF    3    3
> ****duplicate
>
> The dt database has an index, "images_filename_index" ON "images" (
> "filename", "version" );  which means that a 'duplicate' is related to a
> particular image filename. There are two implications from this which may
> be relevant to the issue I raised:
>
> a) The index is is not unique, it allows duplicates. Therefore the
> database allows (and cannot trap) insertion of a new image table row with a
> version number that already exists for the given filename value. The fact I
> have a duplicate version for a filename suggests the dt code also does not
> trap this.
>
> b) This index assumes filenames are unique across the whole dt database,
> which probably is not realistic given how cameras from the same
> manufacturer can generate common filenames.
>
> While a unique id is given to each imported image by the dt db to ensure
> images with the same filename are permitted and can be handled, it seems
> the 'duplicate image' functionality does not recognise this potential.
>
> Regards
> Dusenberg
>
> On 26/07/2023 09:59, Dusenberg wrote:
>
> Guillermo,
>
> Answers to your questions:
>
> a) xmp's are named '<project
> name>_<camerafilename>_<$VERSION>.RAWextension.xmp'
>     eg:
>      original raw: '20200325_BonallyWoods_NIK_1413.NEF'
>      version 3 xmp: '20200325_BonallyWoods_NIK_1413_03.NEF.xmp'
>
> b)  I've checked the files and the new duplicate '3' has overwritten the
> existing xmp for the previous version 3. Also all xmp files in that group
> new have new modified dates -    24 July 2023, when I created the new
> duplicate
>
> Also I didn't mention that the NIK_1413 RAW and duplicates are in a
> single group.
>
> Thanks for your time.
> Dusenberg
>
> On 26/07/2023 03:41, Guillermo Rozas wrote:
>
> That sounds strange. How are the xmp files named? If the duplicate uses a
> previously used version number, does it also overwrites the corresponding
> xmp sidecar?
> Regards,
> Guillermo
>
> On Tue, Jul 25, 2023 at 1:06 PM Dusenberg <dusenb...@gmx.co.uk> wrote:
>
>> Hi Guillermo
>>
>> Yes the original and all duplicates were in the database before making
>> the new duplicate.
>>
>> Regards
>> Dusenberg
>>
>> On 25/07/2023 15:03, Guillermo Rozas wrote:
>>
>> Hi,
>> were the original and all the duplicates present in the database before
>> making the duplicate?
>> Regards,
>> Guillermo
>>
>> On Tue, Jul 25, 2023 at 5:57 AM Dusenberg <dusenb...@gmx.co.uk> wrote:
>>
>>> Originally posted to darktable-dev list in error.
>>>
>>> dt 4.2.1 (OBS), Linux Mint 21,Ubuntu 22.04 jammy
>>>
>>> I have an image from March 2020 developed in darktable. I went back to
>>> it today to try another edit on it (its a monochrome rendition that I just
>>> can't get 'right').
>>>
>>> However, today when I created a duplicate of this 2020 image in dt
>>> 4.2.1, it was given version number '3' - which already exists for that
>>> image (there are seven pre-existing duplicates).  I see that dt has
>>> also given the new duplicate a different 'image id' to the original RAW
>>> image. I've never seen this before, although its not often I go back in
>>> time like this.
>>>
>>> My workflow is that I always create a new version (duplicate) of the
>>> base RAW for a different edit so I can trace back any final output that may
>>> result. My filenaming system is '<filename>_<version
>>> number>_<colorspace>_<max size>' where filename is composed of
>>> '<YYYYMMDD_projectname_original camera filename>'.  Original camera images
>>> are renamed during download onto my workstation via a bespoke script (ie
>>> outside dt).  I use variables in the dt export module to ensure any output
>>> follows this format.  This provides unique identification of every image
>>> and its derivatives across my libraries, even when intermediate tiffs are
>>> involved in say, focus stacks.
>>>
>>> This is critical for me - I can't have two different edits of a RAW with
>>> the same filename!  Why has it happened and what can I do about it?
>>>
>>> Thanks
>>> ____________________________________________________________________________
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>>>
>>
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