Rails 3.1.0

Recently, the rails 3.1.0 is now a release version.

It is recommendable to use rvm (you need to install rvm) creating a new gemset so, we can isolate the install from the rest of our environments. We need the follow steps:

• Creating a gemset:

  rvm --create 1.9.2-p180@rails31

• Installing the last rails version (3.1.0) :

gem install rails

• To generate a new project:

rails new project31

• Adding the following lines to the Gemfile file

gem 'execjs'
gem 'therubyracer'

ExecJS. Run JavaScript code from Ruby.
therubyracer. Embed the V8 Javascript Interpreter into Ruby.

• Running bundle:

bundle install

• Starting the new rails application:

rails s

After it, we would see the following lines:

=> Booting WEBrick
=> Rails 3.1.0 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2011-08-31 09:39:29] INFO  WEBrick 1.3.1
[2011-08-31 09:39:29] INFO  ruby 1.9.2 (2011-02-18) [i686-linux]
[2011-08-31 09:39:29] INFO  WEBrick::HTTPServer#start: pid=11130 port=3000

Release notes
Rails 3.1 sources