Rails 1.1, "enable_upload_progress"

Rails 1.1 was released, and with it the functionality for the "Ajax" (ug, I hate that word) file upload progress bar was turned into a plugin. I am posting this just in case someone followed one of the 1 million "how to upload files" in Rails tutorials and can't figure out why they're seeing the following errors:

config/environment.rb:59: undefined method `enable_upload_progress' for ActionController?::Base:Class (NoMethodError?) from

All you need to do is remove the offending line in their environment.rb file, and run the following command from your rails project root:

script/plugin install upload_progress

Everything should work perfectly. (Mine does. :))

("Thanks" to this blog post.)