Basic cheat sheet for me to help remember the new syntax of Rails 3. Check out the guide and also Rails 3 Upgrade Handbook

Rails 2 Rails 3 about
script/console rails console On the command line, all scripts are now run with the “rails” command. Just leave off “script/” and type rails – instead
RAILS_ROOT Rails.root.to_s When referring to the RAILS_ROOT (the root directory of your project), this is the new way to refer to it.
RAILS_ENV Rails.env
annotate rake db:annotate POSITION=’top’

Note you will want to use the “annotate_model” plug-in instead of the “annotate” gem. To get it up and running in your app, try: rails plugin install

By Jason

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