Custom logger file in Rails

custom_logger.rb

# lib/custom_logger.rb
class CustomLogger < Logger
  def format_message(severity, timestamp, progname, msg)
    "#{timestamp.to_formatted_s(:db)} #{severity} #{msg}\n"
  end
end

logfile = File.open("#{Rails.root}/log/custom.log", 'a')  # create log file
logfile.sync = true  # automatically flushes data to file
CUSTOM_LOGGER = CustomLogger.new(logfile)  # constant accessible anywhere

development.rb

# in development.rb
require "custom_logger"

top_controller.rb

# in controller files
CUSTOM_LOGGER.info("info from custom logger")
CUSTOM_LOGGER.debug("debug from custom logger")
CUSTOM_LOGGER.error("error from custom logger")