EnumMachine extensions and tools

This repository contains extensions and development tools for the enum_machine

Installation

Install the gem and add to the application's Gemfile by executing:

$ bundle add enum_machine-contrib --group "development"

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install enum_machine-contrib

The gem depends on GraphViz. See the installation notes

Usage

Suppose we have AR-model Order with the state machine specified by enum_machine

app/models/order.rb

class Order < ActiveRecord::Base
  enum_machine :state, %w[s0 s1 s2 s3 s3.1 s3.2 s4 s4.1 s4.2 s5 s6 s6.1 s6.2 s7 s8 s9 s10 s11] do
    transitions(
      nil    => %w[s0],
      's0'   => %w[s1],
      's1'   => %w[s2],
      's2'   => %w[s3],
      's3'   => %w[s3.1 s3.2 s4],
      's3.1' => %w[s1],
      's3.2' => %w[s1],
      's4'   => %w[s4.1 s4.2 s5],
      's4.1' => %w[s2],
      's4.2' => %w[s2],
      's5'   => %w[s6.1 s6.2],
      's6.2' => %w[s7],
      's6.1' => %w[s8],
      's8'   => %w[s9],
      's9'   => %w[s10],
      's7'   => %w[s11],
      's10'  => %w[s11],
    )
  end
end

The gem allows to get a visual representation of the state's graph. Model name Order and attribute constant STATE should be defined in rake task to render image.

$ bundle exec rake enum_machine:vis[Order::STATE]

You will see:

Development

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.

Contributing

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

License

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

Code of Conduct

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