Add real_world_date / date_taken field
|Reported by:||warp||Owned by:|
It would be very useful to be able to sort photographs on the date they were taken (which may be different from the date the image file was created).
This will allow users to for example ask for all photographs taken on July 1976.
When users scan pictures or otherwise digitize older media the file creation date will not match the date of the event pictured in the media. This field is about the date of whatever is pictured in the media, and so should be called something like real_world_date, EXIF calls it date_taken.
For files with an EXIF date_taken field, the equivalent mediagoblin database field should get auto-filled when an image is added. Not all media have such a field, so it should be user editable. The EXIF date_taken could also be wrong, so user editable also means the user should be able to clear/delete the date if it was auto-filled.
I discussed this with Elrond (and odinho) on #mediagoblin, 2013-02-18 19:45 UTC.