Custom formatter

config/environments/development.rb

@@ -14,6 +14,9 @@ Rails.application.configure do
   # Do not eager load code on boot.
   config.eager_load = false
 
+  require 'custom_log_formatter'
+  config.log_formatter = CustomLogFormatter.new
+
   # Show full error reports and disable caching.
   config.consider_all_requests_local       = true
   config.action_controller.perform_caching = false