Rumbly - Generate UML Diagrams for Ruby Applications

Rumbly is a Ruby gem that allows you to easily generate UML class diagrams from models built using a variety of object mapping libraries, e.g. ActiveRecord, DataMapper, Mongoid, etc., all with our without Rails.

Rumbly provides a set of generic, abstract classes that are used to describe the key elements of an object model: classes, attributes, operations, and relationships. These abstract classes are not tied to a specific object mapper; mapper-specific subclasses are provided for ActiveRecord, DataMapper, and Mongoid that translate a set of model classes and relationships built on a specific object mapper into the generic model API defined by Rumbly.

These generic model objects are then used to generate UML class diagrams using a variety of diagramming tools; a diagram generator is provided that works with (and requires) Graphviz, but others can be created easily.

Althought Rumbly does not require Ruby on Rails, it provides a set of Rake tasks to make it easy to generate UML class diagrams from within a Rails application, since this is likely to be the most common use case.

First, install the gem:

gem install rumbly

To use Rumbly's default Graphviz output, install the latest version of Graphviz.

To run Rumbly within a Rails environment:

• add gem 'rumby' to your Gemfile
• run bundle install
• run rake rumbly

Rumbly was created by Dustin Frazier (ruby at frayzhe.net) based on the excellent Rails ERD by Rolf Timmermans.

Copyright © 2012 Dustin Frazier

Rumbly is released under the MIT license.