kinopyo blog - Learning through Writing

2011年10月12日 #ruby #rails #log

Railsでcustom log(file)の作り方

rails serverで起動する時に盛りだくさんの情報がログに出力されるので、別ファイルで自分がデバッグしたい情報だけをそこに出力する方法です。この方法でtail -f log/custom.logで監視できます

	# 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

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	# in development.rb
	require "custom_logger"

view raw development.rb hosted with ❤ by GitHub

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

view raw top_controller.rb hosted with ❤ by GitHub