Custom log files in Rails 3
In addition to outputting lots of useful information, the Rails logger can be a useful debugging tool. But debugging with the log file can become frustrating as it will be cluttered with default content. The solution to this problem is to create a custom logger and log file for such output.
The easiest way to do this is to create a global log function, enable it in your development environment, and make sure that calls to it don’t do anything in other environments.