From d3369bb141397b1d286faf0458b24a873a377dc3 Mon Sep 17 00:00:00 2001
From: Kayos <kayos@sulkta.com>
Date: Tue, 28 Apr 2026 19:49:40 -0700
Subject: [PATCH] db: INSERT IGNORE on schema_migrations to tolerate
 multi-worker boot race

---
 cauldron/db.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cauldron/db.py b/cauldron/db.py
index c860082..3561283 100644
--- a/cauldron/db.py
+++ b/cauldron/db.py
@@ -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