Petri Net Workflow engine for Rails

Petri Flow

Workflow engine for Rails: https://github.com/hooopo/petri_flow

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.
• 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

Usage

Add wf_config:

# config/initializers/wf_config.rb
Wf::Workflow.class_eval do
  def self.user_class
    ::User
  end

  # you can add more org class, for example, Role, Department, Position etc.
  def self.org_classes
    { group: ::Group }
  end
end

Set parties:

class User < ApplicationRecord
  belongs_to :group, optional: true
  has_one :party, as: :partable, class_name: 'Wf::Party'

  # NOTICE: group or user or role all has_many users
  has_many :users, foreign_key: :id

  after_create do
    create_party(party_name: name)
  end
end

class Group < ApplicationRecord
  has_many :users
  has_one :party, as: :partable, class_name: 'Wf::Party'
  after_create do
    create_party(party_name: name)
  end
end

then

bundle exec rails 

visit:

http://localhost:3000/wf

Demo App: https://github.com/hooopo/petri_flow_demo

Contributing

Contribution directions go here.

License

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