RailRoady is a dirt simple gem for UML diagram generation on Rails 3/4 projects, capable of analyzing your existing models and controllers. It rocks!

Quick Start

How to get started generating diagrams with minimal effort:

Alternate Usage

If you don't like the way the rake tasks generate files, you can run the "railroady" command-line tool to manually generate DOT diagram source code. See the README for details.

Features

1. Trivial to integrate

   Simple to install and run.

2. Dynamic

   Reverse engineer your existing source code. No more stupid Vizio diagrams that are perpetually outdated.

3. Vector Graphics

   Rake tasks generate scalable vector graphics (SVG) files, which can be scaled to any size without quality loss. View them in a web browser, or even print massive wall-size class diagrams with Adobe Illustrated

4. F/OSS

   Free and open GPL licensing. No fees. Ever.

5. Cross platform

   Runs on Linux and OS X.

6. Raw DOT Support

   Just want the diagram source code without the .SVG files? No problem! (See the gem README file.)

RailRoady is simple because it DOESN'T require..

1. Clicking anything

   No more using OmniGraffle or Vizio for class diagram deliverables! Run the rake task, and out pop your diagrams.

2. Configuration

   Reasonable levels of detail provide for thorough diagrams that are not overwhelming to view and understand.

3. Manual layout

   Even complicated models are layed out in a space-efficient manner. No more manually drag-and-dropping boxes around the screen every time you add a class.