=> Booting Puma => Rails 5.2.1 application starting in development => Run `rails server -h` for more startup options Puma starting in single mode... * Version 3.12.0 (ruby 2.4.4-p296), codename: Llamas in Pajamas * Min threads: 5, max threads: 5 * Environment: development * Listening on tcp://0.0.0.0:3000 Use Ctrl-C to stop Started POST "/chat_rooms/chat_room_sessions" for 127.0.0.1 at 2018-09-03 16:00:32 +0100  (0.6ms) SELECT "schema_migrations"."version" FROM "schema_migrations" ORDER BY "schema_migrations"."version" ASC ↳ /Users/oliverab/.rvm/gems/ruby-2.4.4/gems/activerecord-5.2.1/lib/active_record/log_subscriber.rb:98