Petri Flow

Workflow engine for Rails.

Features

• Full petri net features support (seq, parallel, iterative, timed, automitic etc.)
• Both approval workflow and business workflow.
• Simple web admin for workflow definition and case management.
• Build-in simple dynamic form.
• Replaceable dynamic form.
• Support sub workflow.
• Graph screen for workflow definition.
• Graph screen for case and token migration.
• Powerful guard expression.
• MySQL and Postgres Support.
• Powerful assignment management.
• Flexible integration of organizational structure system(role, group, position or department etc.)

Docs

• Petri-Nets and Workflows
• Workflow Conceptual Guide
• Workflow Concepts Reference
• Petri Flow ERD
• Developer Doc

Screenshots

iterative routing

parallel_routing

guard

case state graph

Installation

Add this line to your application's Gemfile:

gem 'petri_flow', require: 'wf'

And then execute:

$ bundle

Install graphviz

brew install graphviz

Migration:

bundle exec rake wf:install:migrations
bundle exec rails db:create
bundle exec rails db:migrate
bundle exec rails db:seed

Usage

Add wf_config:

# config/initializers/wf_config.rb
Wf.user_class = "::User"
Wf.org_classes = { group: "::Group" }

Set parties:

For normal org model, for example group or role etc.

module Wf
  class Group < ApplicationRecord
    has_many :users 
    include Wf::ActsAsParty
    acts_as_party(user: false, party_name: :name)
  end
end

For user model:

module Wf
  class User < ApplicationRecord
    belongs_to :group, optional: true
    include Wf::ActsAsParty
    acts_as_party(user: true, party_name: :name)
  end
end

then

bundle exec rails 

visit:

http://localhost:3000/wf

Testing

• RAILS_ENV=test rake app:db:migrate && RAILS_ENV=test rake app:db:test:prepare && bundle exec rake test

Contributing

Contribution directions go here.

License

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