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tavolo/server/migrations/models/4_20261009082421_leaderboard_stats.py
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woggioni 1ab748a34f
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Paginate the leaderboard from materialized player ratings
Store each player's leaderboard totals (wins, accumulated points and the
latest display name) on player_rating alongside the Elo rating, updated
in the same transaction as the match, so the board is a single indexed
table query instead of aggregating every participation on each request.

GET /api/leaderboard is now page-number paginated (page/limit) and
returns the page, page count and total, plus the caller's own rank and
page when authenticated; focus=me returns the caller's page directly.
The migration adds the columns, backfills them from the match history
(inserting rows for players from pre-Elo matches at the initial rating)
and replaces the index. backfill_elo rebuilds the aggregates too.

The web page opens on the page containing the signed-in player, marks
their row and adds a numbered footer pager.
2026-10-09 16:42:47 +08:00

80 lines
4.3 KiB
Python

from tortoise import BaseDBAsyncClient
RUN_IN_TRANSACTION = True
async def upgrade(db: BaseDBAsyncClient) -> str:
return """
DROP INDEX IF EXISTS "idx_player_rati_game_ty_3326d1";
ALTER TABLE "player_rating" ADD "points" DOUBLE PRECISION NOT NULL DEFAULT 0;
ALTER TABLE "player_rating" ADD "display_name" VARCHAR(200) NOT NULL DEFAULT '';
ALTER TABLE "player_rating" ADD "wins" INT NOT NULL DEFAULT 0;
-- Backfill the leaderboard aggregates from the match history:
-- existing rows keep their rating and matches, while players from
-- matches recorded before ratings existed are inserted at the
-- initial rating (1500) so they stay on the board.
INSERT INTO "player_rating" (
"id", "user_sub", "game_type", "rating", "matches_played",
"wins", "points", "display_name", "updated_at"
)
SELECT gen_random_uuid(), agg.user_sub, agg.game_type, 1500,
agg.matches, agg.wins, agg.points, agg.display_name, NOW()
FROM (
SELECT mp.user_sub AS user_sub,
m.game_type AS game_type,
COUNT(*) AS matches,
SUM(CASE WHEN mp.won THEN 1 ELSE 0 END) AS wins,
SUM(mp.score) AS points,
(ARRAY_AGG(mp.display_name ORDER BY m.finished_at DESC, m.id DESC))[1]
AS display_name
FROM "match_player" mp
JOIN "match" m ON m.id = mp.match_id
GROUP BY mp.user_sub, m.game_type
) agg
ON CONFLICT ("user_sub", "game_type") DO UPDATE
SET "wins" = EXCLUDED."wins",
"points" = EXCLUDED."points",
"display_name" = EXCLUDED."display_name";
CREATE INDEX "idx_player_rati_game_ty_abcb75" ON "player_rating" ("game_type", "rating", "wins", "points", "matches_played", "user_sub");"""
async def downgrade(db: BaseDBAsyncClient) -> str:
return """
DROP INDEX IF EXISTS "idx_player_rati_game_ty_abcb75";
ALTER TABLE "player_rating" DROP COLUMN "points";
ALTER TABLE "player_rating" DROP COLUMN "display_name";
ALTER TABLE "player_rating" DROP COLUMN "wins";
CREATE INDEX "idx_player_rati_game_ty_3326d1" ON "player_rating" ("game_type", "rating");"""
MODELS_STATE = (
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