Improve ActiveRecord connection in on_worker_boot (#9238)

This is how it looks in the example in the Puma README

diff --git a/config/puma.rb b/config/puma.rb
index 5ebf5ed192a654980c38069fd3655c70a7c39976..1afdb1c6dfbc0900051690c33a2013482398132a 100644 (file)
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -13,7 +13,9 @@ workers     ENV.fetch('WEB_CONCURRENCY') { 2 }
 preload_app!
 
 on_worker_boot do
-  ActiveRecord::Base.establish_connection if defined?(ActiveRecord)
+  ActiveSupport.on_load(:active_record) do
+    ActiveRecord::Base.establish_connection
+  end
 end
 
 plugin :tmp_restart