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db: INSERT IGNORE on schema_migrations to tolerate multi-worker boot race

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Sulkta 2026-04-28 19:49:40 -07:00
parent 48026aeae4
commit 00a4c71aa9
1 changed files with 3 additions and 1 deletions
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4
cauldron/db.py
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@ -100,8 +100,10 @@ class DB:
if ver in done:
continue
cur.execute(sql)
# IGNORE to tolerate the multi-worker boot race where two
# gunicorn workers both bootstrap an empty migrations table
cur.execute(
"INSERT INTO schema_migrations (version) VALUES (%s)", (ver,)
"INSERT IGNORE INTO schema_migrations (version) VALUES (%s)", (ver,)
)
applied.append(ver)
return applied