Support Multiple Artists/Composers/Performers

[tkem]

As stated in the README.rst, the current DB schema does not support multiple artists, composers, or performers.

(Non-functional) Requirements:

• At least for the common, single-artist case, there should be no noticable performance impact (especially on small platforms like the Raspberry Pi).
• The one result row per track property of the tracks view should be maintained.
• Denormalization of the schema in general should be avoided, if feasible.
• Storing data as text ist preferred.
• An upgrade path for existing users must be provided.

[tkem]

See also beetbox/beets#505 for inspiration.

[tkem]

Actually considered to be of minor priority, since media files containing multiple artist/composer/performer tags are rare. Practically non-existant, IMHO.

[tkem]

Officially deferred until Mopidy gets its new Metadata API, which will require a redesign of the whole database schema anyway.

[tkem]

Current plans for Mopidy Core v1.0 have tracks and albums only contain artist URIs and no longer full Artist models. This better fits the current schema, since the main issue with this is efficiently generating the list of artist models for each track. So track.artists could remain a TEXT field containing ws-seperated URIs as originally planned.

[tkem]

I guess that's Mopidy v2.0 now.

[Shadowghost]

So what about this? Any news or (further) implementation plans?
To explain my situation: I use (self-tagged) multiple artist tags mostly because of Kodi, which allows me to have all artists to be listed in the artist category, but the albums to be listed with the artists from album-artist tag if present. Since ID3v2.4 (and APEv2) multiple tags are an officially supported scheme.

[fran-penedo]

I just updated to mopidy 3 and I swear I remember multiple artists working, but I can't find any reference to it being implemented, so I actually don't know why they used to work? In any case, I'd like to request this feature or at least start some discussion about it. I might be able to work on it myself if I can get a few pointers.