I have most of my collection under control with Beets now, but one thing I previously have had that I’d like to retain is a “Collections” folder, separate from Compilations, for large series of Compilations (I collected Mastercuts and Streetsounds compilations in the 90s, for example). So I’ve figured out I can add a new field for those like this:
beet modify collection="Now That’s What I Call Music!" album:"Now That’s What I Call Music"
with the intention that I can do something like:
collection::^.+: Collections/$collection/$album%aunique{} [$year]/$track $title - $artist
to file them for me.
Except it doesn’t work. Is there a less tricky way to match on “exists and has a value” in the path specification?
Slightly related: Is there a way to exactly match an album title? For the “Now That’s What I Call Music!” series, all but the first two releases have a number after (the second had II). The very first one has an incorrect release date in MusicBrainz. How can I select that album to use “beet modify” and correct it?