bvandeusen
40384cc05e
Milestone #160 Opt 2 (era half). A third taste facet alongside artists + genre tags: signed weights over decade buckets ("1990s") derived from albums.release_date, rebuilt daily and scored into the taste match. - Migration 0045: taste_profile_eras table (mirrors taste_profile_tags) + taste_tuning.era_scale column (DEFAULT 0.5). - Build side (internal/taste): Config.EraScale ([0,1] damper, mirrors EnrichedTagScale), accumulate folds each play/like's decade at base*EraScale, persist atomic-replaces the era rows. - Scorer (internal/recommendation): TasteProfile gains an era term (own tanh scale + additive 0.15 share so it never weakens the existing artist/tag signal when a track is undated); candidate queries return album release_date; decadeOf mirrors the builder helper. - Tuning lab: era_scale threaded through recsettings + admin API + web card (auto-renders the new row) + Go/web tests. Mood facet deferred to #1534 (partial enrichment coverage + needs candidate-side enriched-tag loading). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
27 lines
1.3 KiB
SQL
27 lines
1.3 KiB
SQL
-- 0045_taste_profile_eras.up.sql — era/decade taste facet (#1530,
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-- milestone #160 Opt 2). A third taste facet alongside artists + tags:
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-- signed weights over decade buckets ("1990s") derived from
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-- albums.release_date, rebuilt daily by internal/taste next to the
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-- artist/tag facets. Weight is a signed float — positive = drawn to
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-- that era, negative = passively avoided; magnitude reflects decayed
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-- engagement. Consumed by the recommendation scorer's taste match.
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-- Mirrors taste_profile_tags: CASCADE on user delete, indexed by
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-- (user_id, weight DESC) so "top eras" reads stay cheap.
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CREATE TABLE taste_profile_eras (
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user_id uuid NOT NULL REFERENCES users(id) ON DELETE CASCADE,
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era text NOT NULL,
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weight double precision NOT NULL,
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updated_at timestamptz NOT NULL DEFAULT now(),
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PRIMARY KEY (user_id, era)
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);
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CREATE INDEX taste_profile_eras_user_weight_idx
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ON taste_profile_eras (user_id, weight DESC);
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-- Era-facet build knob, tunable in the lab (mirrors enriched_tag_scale,
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-- #1520): scales how strongly a decade-play imprints on the profile.
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-- DEFAULT 0.5 backfills the existing singleton and matches
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-- taste.DefaultConfig().EraScale; 0 disables the era facet entirely.
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ALTER TABLE taste_tuning
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ADD COLUMN era_scale double precision NOT NULL DEFAULT 0.5;
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