Popular took Deezer's `/top` fifty and re-sorted it by scrobbles, so the LIST
could never be better than Deezer's catalogue. For most artists that is
invisible — measured against Last.fm's own top ten, Queen, Radiohead, Weezer,
Green Day, Fleetwood Mac and Tame Impala agreed on 56 of 60 rows. For an artist
Deezer carries badly it is the whole page. Deezer has no Loveless at all: 8 of
My Bloody Valentine's Last.fm top ten are absent from its catalogue outright,
so Popular filled up with b-sides, a compilation cut and a soundtrack cut, and
"When You Sleep" — the song with 1.28M listeners, more than any other they
recorded — could not appear at any position.
So Last.fm's ranking IS the list now, and each entry is resolved in preference
order: a Deezer track of the same `track_title_identity` when one exists, since
that brings a real album, cover, preview and duration and stays eligible for
attribution; otherwise a row built from the MusicBrainz recording, which
supplies the record it belongs to and the track length. Anything neither
provider can place is dropped, and Deezer rows Last.fm never ranked still
backfill from underneath so a thin Last.fm artist keeps a full list.
A synthesized row has no 30-second preview and that is the whole cost, because
playback never needed one: streaming resolves over Soulseek by artist and
title, and the Deezer id only ever marked the now-playing row. The previews
button already reports partial availability, so it reads "7 of 20 available"
rather than pretending.
Their albums come from ONE request. `release?artist={mbid}&inc=recordings+
release-groups` returns every release WITH its tracklist and names the work each
pressing belongs to — measured on My Bloody Valentine, 208 KB covering 64
releases that fold to 27 works. The alternative was a lookup per supplemented
album behind the 1 req/s gate. Only the full page pays for it; the overview
still just orders Deezer's pool and is replaced wholesale a moment later.
**And a relabel for songs whose record Deezer does not sell.**
`apply_original_album_attribution` can only move a track onto another DEEZER
album, because it swaps the row onto that album's real track — so when the
original is missing from Deezer entirely there is nothing to swap to and the row
keeps the pressing Deezer licensed, which is exactly the kind of record the rule
exists to remove. Deezer carries precisely two Loveless songs, "Only Shallow" on
the compilation *Amateur* and "Sometimes" on the *Lost In Translation*
soundtrack, so those two sat under a compilation and a soundtrack while the
eighteen tracks Deezer does NOT carry already showed Loveless.
That pass is a relabel, not a swap: album, album_id and cover follow
MusicBrainz while id, preview and duration stay on the Deezer pressing, which is
still the playable one. It may only take a row AWAY from a record that is not a
studio album, or it would overrule a correct attribution and trade a real album
card for a synthetic id with no card behind it — verified, Queen's "Bohemian
Rhapsody" stays on *A Night At The Opera* and the pass reports 0 relabelled for
Queen and Radiohead.
Mixtape/Street counts as a studio record for this, for the same reason it earns
its own tab: excluding it left "Guillotine" attributed to the SINGLE named after
it rather than to Exmilitary, which is the album it opens. Every other secondary
type still disqualifies.
POPULAR_KEEP 10 → 20, and the frontend's own `slice(0, 10)` is gone rather than
raised to match. There were two caps for one number and they disagreed the
moment either moved; the backend owns it now.
Measured live: My Bloody Valentine's Popular is Last.fm's ranking exactly —
When You Sleep, Only Shallow, Sometimes, Loomer, To Here Knows When, Soon,
Touched — all twenty on Loveless or Isn't Anything. Queen gains "We Will Rock
You" on *News of the World*, which the Deezer-pool list omitted because Deezer
sells it only as a Movie Mix. Death Grips' "Guillotine" moves to Exmilitary.
75 Rust tests and 85 JS tests pass.
Known, and older than this change: Radiohead's "No Surprises", "Karma Police"
and "Let Down" attribute to *OK Computer OKNOTOK 1997 2017* rather than *OK
Computer*. Deezer carries both and dates BOTH 1997-05-21, so the rule's date
tiebreak cannot separate them and the 23-track reissue wins; `is_edition_title`
does not recognise "OKNOTOK 1997 2017" as an edition marker. The relabel pass
reports 0 for Radiohead, so this is the existing attribution rule, not the new
one.
KeelrLeek
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