bvandeusen
e2432caa65
tracks.mbid was 100% NULL: the scanner only extracted album + artist MBIDs, never the recording MBID. The ListenBrainz similarity worker is gated on tracks.mbid IS NOT NULL, so track_similarity could never populate — starving For-You/radio's strongest candidate source (lb_similar) on every library. - mbids.go: add extractRecordingMBID (mbz.Recording / Picard musicbrainz_recordingid). Separate fn so extractMBIDs' signature + unit tests stay untouched. - scanner.go: persist recording MBID via UpsertTrack (heals on the file_path conflict, so re-scans backfill for free). - BackfillTrackMBIDs: one-shot pass mirroring BackfillMBIDs, wired as scan Stage 2b (idempotent via SetTrackMbidIfNull, gated by BackfillCap, log-only progress). - migration 0029: tracks_mbid_unique (0002, written when the column was always NULL) wrongly assumes one MBID == one track. A recording appears on multiple releases, so rows legitimately share a recording MBID. Replace with a non-unique partial index. Zero-risk: column is 100% NULL at migration time. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
16 lines
841 B
SQL
16 lines
841 B
SQL
-- tracks.mbid holds the MusicBrainz *recording* MBID — the id the
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-- ListenBrainz similarity pipeline (ListPlayedTracksNeedingSimilarity,
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-- GetTracksByMBIDs) matches on. A single recording legitimately appears
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-- on multiple releases (album + compilation + single), so multiple
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-- tracks rows share one recording MBID.
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--
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-- tracks_mbid_unique (added in 0002, when this column was always NULL
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-- and never populated) wrongly assumes one MBID == one track. Now that
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-- the scanner extracts the recording MBID, that uniqueness throws
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-- 23505 for any recording present on >1 release. Replace it with a
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-- non-unique partial index serving the same lookups. Zero-risk: the
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-- column is 100% NULL at migration time.
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DROP INDEX IF EXISTS tracks_mbid_unique;
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CREATE INDEX IF NOT EXISTS tracks_mbid_idx ON tracks (mbid) WHERE mbid IS NOT NULL;
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