Visualize State Machines using GraphViz


Add this line to your application's Gemfile:

gem 'stateoscope'

And then execute:

$ bundle


To generate a state machine visualization for your Model, run

rake 'stateoscope:visualize[Model]'

If you have multiple state machines defined on your model, you can pass the name of the state machine as second parameter

rake 'stateoscope:visualize[Model,specific_state_machine]'

In both cases, a PDF file containing the graph visualization will be saved to the current directory.


Stateoscope is currently integrated with the following state machine gems:


After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at