Prepare Your App for Rails 4 and Ruby 1.9 | Engine Yard BlogWell, it had to happen some day. Pour one out for our dearly beloved Ruby 1.8.7. And if you’re still using 1.8.7 for your Rails app, pour yourself a cup of coffee—Rails 4.0 will run strictly on Ruby 1.9. The Rails master branch was moved to 4.0 two months ago, almost 6 years to the date of the announcement of Rails 1.0, and the primary cited reason for doing so is to get everyone using Rails on Ru
