按日期存储Rails日志_Ruby_编程开发_程序员俱乐部

最简单的方法是

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RAILS_DEFAULT_LOGGER = Logger.new("#{RAILS_ROOT}/log/#{RAILS_ENV}.log", "daily") 

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实际上Rails做了一些优化，通过ActiveSupport::BufferedLogger来提高产品环境下的性能。所以比较好的做法是在config/environment.rb加入如下代码：

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	config.logger = begin
		path = config.paths.log.to_a.first
		logger = ActiveSupport::BufferedLogger.new(path, "daily")
		logger.level = ActiveSupport::BufferedLogger.const_get(config.log_level.to_s.upcase)
		logger.auto_flushing = false if Rails.env.production?
		logger
	rescue StandardError => e
		logger = ActiveSupport::BufferedLogger.new(STDERR)
		logger.level = ActiveSupport::BufferedLogger::WARN
		logger.warn(
			"Rails Error: Unable to access log file. Please ensure that #{path} exists and is chmod 0666. " +
			"The log level has been raised to WARN and the output directed to STDERR until the problem is fixed."
		)
		logger
	end

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