Metadata Updated At?

[eecue]

Is there a way to tell when metadata has been updated? I see there is a date_modified field but that stays None when changing things like Location or Keywords.

[RhetTbull]

Not sure as I've not looked into this specifically. The modification date is only updated when the photo is edited.

You can do a test by running osxphotos snap, add a keyword, then run osxphotos diff. This will show all changes in the library. The ACHANGE values appear to be some sort of transaction log or rollback record but they won't be reliable for detecting this as I believe they're transient. You want to look for a change in ZASSET, ZADDITIONALASSETATTRIBUTES etc

If there is a record of the change date osxphotos can easily be modified to read the appropriate column.

[RhetTbull]

By the way, osxphotos export detects metadata changes (needed for --update ) by storing a JSON representation of all the metadata in the export database and comparing the current metadata with the stored metadata. This works for detecting changes but does not tell you when something changed, only that it changed.

[eecue]

that's actually perfect for what I'm doing... I don't really need to know when

[RhetTbull]

See also hexdigest

[eecue]

Oh yeah that's what I need!

[RhetTbull]

If you need an easy way to store the metadata or hex digest between runs, osxphotos includes a super simple Key-Value store backed by sqlite: from osxphotos.sqlitekvstore import SQLiteKVStore. For an example, see detect_qrcodes.py Full docs here