From df04e99447c4428e9517928c631a62c2756e49b3 Mon Sep 17 00:00:00 2001
From: BenClaw <benclaw@mozo.bar>
Date: Sun, 17 May 2026 18:49:13 +0200
Subject: [PATCH] fix(action_cable): ensure logger is set for upgraded Rails
 app

- ActionCable::TaggedLoggerProxy crashes with NoMethodError when
  logger is nil (common in apps upgraded from older Rails)
- Add after_initialize hook to guarantee ActionCable.server.config.logger
  falls back to Rails.logger or
---
 config/initializers/action_cable.rb | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 config/initializers/action_cable.rb

diff --git a/config/initializers/action_cable.rb b/config/initializers/action_cable.rb
new file mode 100644
index 00000000..ea50c416
--- /dev/null
+++ b/config/initializers/action_cable.rb
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+# Ensure ActionCable has a logger in all environments.
+# In apps upgraded from older Rails versions, the logger chain
+# may not propagate to ActionCable out of the box, causing:
+#   NoMethodError (undefined method 'info' for nil)
+#   in ActionCable::Connection::TaggedLoggerProxy#log
+#
+Rails.application.config.after_initialize do
+  ActionCable.server.config.logger ||= Rails.logger || ActiveSupport::Logger.new($stdout)
+  ActionCable.server.config.logger.level = Rails.logger&.level || Logger::INFO
+end