Model annotation

A helpful reader has noted that the annotate-models gem used by the Ruby on Rails Tutorial has disappeared from RubyGems. When you try to bundle install, you get this error:

Could not find gem 'annotate-models (= 1.0.4)'
in any of the gem sources listed in your Gemfile.

The solution is to use the annotate gem instead:

Gemfile

gem 'annotate', '2.4.0'

Then run

$ bundle install

as usual.

In order to reproduce the behavior of the annotate command provided by annotate-models, you should use bundle exec and pass the new annotate command the before option:

$ bundle exec annotate --position before

The Ruby on Rails Tutorial book has been updated accordingly.