This is the reference implementation of the sample application for the 4th edition of Ruby on Rails Tutorial: Learn Web Development with Rails by Michael Hartl.

All source code in the Ruby on Rails Tutorial is available jointly under the MIT License and the Beerware License. See LICENSE.md for details.

Run the test suite to verify that everything is working correctly:

$ rails test

If the test suite passes, you'll be ready to run the app in a local server:

$ rails server

To check out the code for a particular chapter, first find the branch name using

$ git branch -a

A branch called remotes/orgin/foo-bar can be checked out using git checkout foo-bar.

Next, copy the contents of the Gemfile using a text editor and then use

$ git checkout chapter-branch-name

to check out the chapter branch. Finally, copy the contents into the Gemfile and run

$ bundle update

At this point, the branch should be working. (You have to copy the Gemfile contents because it's incredibly hard to keep all branches up-to-date, so only the main one is guaranteed to be current.)

For more information, see the Ruby on Rails Tutorial book.