beet update for selective fields

[dangmai]

Right now beet update doesn't have an option for updating only selective fields yet, and I think it'd be a good addition.

My use case for that is the following: I've manually updated the music metadata out of band for the Grouping tag using an external media player. However that media player also updates other tags that it's not supposed to, and now I want to update beet's backend with only the new Grouping information.

If this is something desirable, I can open a PR and start working on those. I'm thinking of adding a -f flags to specify which fields to update, and they can be comma separated.

[sampsyo]

Yes! This sounds great. The request even sounds familiar—although I can't find another ticket that mentions the idea.

An -f flag to the update command sounds reasonable. But I'd slightly prefer a version where you just provide the -f flag multiple times over a comma-separated list.

[dangmai]

Yup multiple -f is definitely better, I'll implement it that way.

Is this the ticket you're thinking about? https://groups.google.com/forum/#!topic/beets-users/o0hibIx3FSI

[sampsyo]

Yep, that was exactly it. Thanks for digging through the mailing list.