Re: [Shotwell] How to delete a photo from the shotwell databse

[Jørn Villesen Christensen <shotwell mettle dk>]

Hi,


On 03/04/18 01:24, Larry Bradley wrote:
> However, there are other tables that refer to photos (eventtable,

Eventtable is referenced from phototable: Eventtable.id <=> 
Phototable.event_id.

> tagtable) that will need to be updated. Can someone tell me how Shotwell
> deletes entries in these tables?

Tagtable.photo_id_list contains a list of images associated with that 
tag. For photos they look like this: thumb0000000000000cc1 – i.e. 
"thumb" + the hex representation of the photo id. Or in printf-terms: 
("thumb%016x", phototable.id).

For videos it is the same (IIRC), though with "video-" instead of 
"thumb" and from the videotable.id.

> For example, the tag table. Given the photo id, I know the thumbnail
> name. The problem is to find that name (eg thumb00000007f) in the tag
> table's photo_id_list. Also, I need to find the photoid in the list as
> well, to delete the Folders entry.
>
> Any help on deleting entries from the various shotwell tables, given a photo id, would be appreciated
> Thanks

Other things... just noting from looking at the database:
 - There is a link phototable.id <=> eventtable.primary_source_id as 
well. I guess it either sets the date of the event and/or thumbnail.
 - Reference from backingphototable: backingphototable.id <=> 
phototable.editable_id.

There is a tombstonetable which I cannot quite figure out does or how it 
is referenced....

The saved search table I have not looked at so much... but also seems 
simple, though not needed for your application, I guess.

Hope that helps.

~Jørn