Question

I currently have some code that is being repeated over and over, and it looks rather terrible. What’s the best way to use Ruby’s metaprogramming to clean this up?

A recurring theme I have is something like this:

class Object
  def some_logger
    @some_logger ||= Logger.new("log/some.log")
  end

  def some2_logger
    @some2_logger ||= Logger.new("log/some2.log")
  end
end

In theory, I just want to be able to call an arbitrary logger throughout my Rails app and have those logs go to a separate, easily identifiable file. So I can at random will call:

some3_logger.info("Wooohooo!") in a controller or model without having to go back to my initialization code and create it there.

Answer 1

You could pass the logger name as a parameter:

module CustomLogger
    def custom_logger(name)
        @custom_loggers ||= {}
        @custom_loggers[name] ||= Logger.new("log/#{name}.log")
    end
end

Just include CustomLogger wherever you need and you can do:

custom_logger("some3").info("Wooohooo!")