Graphviz::Diagram

A simple utility to create class-diagrams based on Graphviz.

Installation

Add this line to your application's Gemfile:

gem 'graphviz/diagram'

And then execute:

$ bundle

Or install it yourself as:

$ gem install graphviz-diagram

Usage

Create a diagram:

g = Graphviz::Diagram.new

g['Author'].add_attribute 'name', visibility: :private, type: 'String'
g['Author'].add_attribute 'age', visibility: :private, type: 'Age'
g['Author'].add_method 'books', type: 'Array'
g['Author'].add_method 'update', arguments: 'name, age', type: 'Boolean'

g['Book'].add_attribute 'title', type: 'String'
g['Book'].add_method 'author', type: 'Author'

g << g['Book'].belongs_to(g['Author'])
g.output png: 'book_author.png'

It create a book_author.png file looks like:

(examples folder contains more examples)