This is ok, but to do this in a perfect way we have to do something similar to what we did with database_example.yml file, this is proposse a file named ```application_example.yml``` and upload all keys defined on ```application.yml``` into a Constant in application.rb file.

So we save the task to define this to every environment, and each developer doesn't share any sensible information.

Check this [post](http://railscasts.com/episodes/85-yaml-configuration-revised?view=asciicast)