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Rails Tutorial updated for Rails 4.0.1

Nov 1, 2013 • posted by Michael Hartl

I’ve just updated the Ruby on Rails Tutorial book for the newest Rails release, Rails 4.0.1. If you’re updating your sample_app to Rails 4.0.1, you’ll need to change rails to 4.0.1 and bcrypt-ruby to 3.1.2, as seen in the reference sample app Gemfile:

source 'https://rubygems.org'
ruby '2.0.0'
#ruby-gemset=railstutorial_rails_4_0

gem 'rails', '4.0.1'
gem 'bootstrap-sass', '2.3.2.0'
gem 'bcrypt-ruby', '3.1.2'
.
.
.

Then run

bundle install
bundle update
bundle install
rspec spec/

(I’m actually not sure if both calls to bundle install are necessary, but they can’t hurt.)

As far as I can tell, there are no changes between Rails 4.0.0 and 4.0.1 that affect the Rails Tutorial, but please let me know if you run into any issues.

Michael-hartl
Michael Hartl

I’m Michael Hartl—author, educator, and entrepreneur. I’m probably best known as the creator of the Ruby on Rails Tutorial, a book and screencast series that together constitute one of the leading introductions to web development. Once called his “favorite book” by Wikipedia founder Jimmy Wales, the Ruby on Rails Tutorial currently has over 150 5-star reviews at Amazon. I’m also (in)famous for creating Tau Day and The Tau Manifesto, which have inspired an international movement dedicated to the proposition that “pi is wrong.” (For example, as a result of The Tau Manifesto, MIT releases their admissions decisions each year at “Tau Time” (6:28 p.m.), and typing tau/2 at Google yields 3.14159…) Finally, I’m a founder of Softcover, a publishing system and sales platform for technical authors, which among other things powers both The Tau Manifesto and the Ruby on Rails Tutorial.

I’m a graduate of Harvard College and have a Ph.D. in Physics from Caltech, where I studied black hole dynamics and was an award-winning instructor in theoretical and computational physics. I’m also an alumnus of Y Combinator, the entrepreneur program that has produced companies such as Dropbox and Airbnb. (Alas, my own Y Combinator startup was neither Dropbox nor Airbnb.)