From c8a5d01771a284a595cfdc46550fb1e2325e5915 Mon Sep 17 00:00:00 2001
From: "Stanko K.R." <stanko@stanko.io>
Date: Fri, 12 Dec 2025 09:59:42 +0100
Subject: [PATCH] Wrap join code redemption in a lock

---
 app/models/account/join_code.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/app/models/account/join_code.rb b/app/models/account/join_code.rb
index 79160cbaa..6438d3ab8 100644
--- a/app/models/account/join_code.rb
+++ b/app/models/account/join_code.rb
@@ -11,8 +11,8 @@ class Account::JoinCode < ApplicationRecord
   before_create :generate_code, if: -> { code.blank? }
 
   def redeem_if(&block)
-    transaction do
-      increment!(:usage_count) if block.call(account)
+    with_lock do
+      increment!(:usage_count) if active? && block.call(account)
     end
   end