aasm-vis generates a visual representation of the state machines defined with aasm gem.

Add gem 'aasm-vis', group: :development to your Gemfile and run bundle.

bundle exec rake aasm_vis:generate

To visualise the results you can use the github cli: gh gist create tmp/assm-vis.md or any other tool that can render markdown files supporting mermaid.

The following ruby code defines a simple state machine for a Job model:

class Job < ApplicationRecord
  include AASM
  
  aasm :state do
    state :created, initial: true
    state :running
    state :finished_successfully
    state :finished_with_error
    
    event :run, after: :notify_somebody do
      transitions from: :created, to: :running
      transitions from: :running, to: :finished_with_error
      transitions from: :running, to: :finished_successfully
    end
  end
end

It will generate the following mermaid diagram:

---
title: Job#state
---
stateDiagram-v2

created : Created
running : Running
finished_successfully : Finished successfully
finished_with_error : Finished with error
  
[*] --> created
created --> running
running --> 
7CF7
finished_with_error
running --> finished_successfully

finished_with_error --> [*]
finished_successfully --> [*]

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 the created tag, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/kamil-gwozdz/aasm-vis. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

The gem is available as open source under the terms of the MIT License.

Everyone interacting in the AASM::Vis project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.