Debug Ruby on Rails with Aptana Studio 3

1. Check if ruby-debug-ide is installed

$ gem list

2. If not installed, install ruby-debug-ide

$ gem install ruby-debug-ide

3. Open the project in Aptana Studio 3, App Explorer -> Gear icon’s drop down menu -> Debug Server

4. Set a breakpoint in a file, e.g. index.html.erb

5. Open http://localhost:3000/<your path>/index.html in your browser

6. Aptana will ask you if open Debug perspective. Of cause. You can see the server stops at the break point.

Originally published at vinceyuan.github.io on May 11, 2012.