RailRoady generates Rails 3/4 model (ActiveRecord, Mongoid, Datamapper) and controller UML diagrams as cross-platform .svg files, as well as in the DOT language.
Code is based on the original "railroad" gem, patched and maintained over the years. Lineage can be traced via GitHub.
I (Preston Lee) am not trying to hijack Peter Hoeg or Javier's project, but rather create a dedicated, lean gem that can be used without major issue on Rails v3 and v4 projects. Rails v2 is not supported.
You MUST have the the following utilities available at the command line.
sed, which should already be available on all sane UNIX systems.
Brew users can install via:
brew install graphviz
MacPorts users can install in via
sudo port install graphviz
Ubuntu users can install in via
sudo apt-get install graphviz
The easiest (and recommend) usage is to include railroady as a development dependency with your Rails 3 Gemfile, like so...
group :development, :test do gem 'railroady' end
...and then run the master rake task...
This should generate four doc/*.svg files that can be opened in (most) web browsers as well as dedicated document viewers supporting the Scalable Vector Graphics format.
Support for Engines
Generate diagram for models and controllers including those in the engines.
Alternatively, you may run the 'railroady' command-line program at the Rails application's root directory. You can redirect its output to a .dot file or pipe it to the dot or neato utilities to produce a graphic. Model diagrams are intended to be processed using dot and controller diagrams are best processed using neato.
railroady [options] command
Common options: -b, --brief Generate compact diagram (no attributes nor methods) -s, --specify file1[,fileN] Specify only given files -e, --exclude file1[,fileN] Exclude given files -i, --inheritance Include inheritance relations -l, --label Add a label with diagram information (type, date, migration, version) -o, --output FILE Write diagram to file FILE -r, --root PATH Set PATH as the application root -v, --verbose Enable verbose output (produce messages to STDOUT) -x, --xmi Produce XMI instead of DOT (for UML tools) --alphabetize Sort methods alphabetically Models diagram options: -a, --all Include all models (not only ActiveRecord::Base derived) --show-belongs_to Show belongs_to associations --hide-through Hide through associations --all-columns Show all columns (not just content columns) --hide-magic Hide magic field names --hide-types Hide attributes type -j, --join Concentrate edges -m, --modules Include modules -p, --plugins-models Include plugins models -z, --engine-models Include engine models --include-concerns Include models in concerns subdirectory -t, --transitive Include transitive associations (through inheritance) Controllers diagram options: --hide-public Hide public methods --hide-protected Hide protected methods --hide-private Hide private methods --engine-controllers Include engine controllers Other options: -h, --help Show this message --version Show version and copyright -c, --config FILE File to load environment (defaults to config/environment)
You must supply one of these:
-M, --models Generate models diagram -C, --controllers Generate controllers diagram -A, --aasm Generate "acts as state machine" diagram
railroady -o models.dot -M Produces a models diagram to the file 'models.dot' railroady -a -i -o full_models.dot -M Models diagram with all classes showing inheritance relations railroady -M | dot -Tsvg > models.svg Model diagram in SVG format railroady -C | neato -Tpng > controllers.png Controller diagram in PNG format railroady -h Shows usage help
Processing DOT files
To produce a PNG image from model diagram generated by RailRoady you can issue the following command:
dot -Tpng models.dot > models.png
If you want to do the same with a controller diagram, use neato instead of dot:
neato -Tpng controllers.dot > controllers.png
If you want to produce SVG (vectorial, scalable, editable) files, you can do the following:
dot -Tsvg models.dot > models.svg neato -Tsvg controllers.dot > controllers.svg
Important: There is a bug in Graphviz tools when generating SVG files that cause a text overflow. You can solve this problem editing (with a text editor, not a graphical SVG editor) the file and replacing around line 12 "font-size:14.00;" by "font-size:11.00;", or by issuing the following command (see "man sed"):
sed -i 's/font-size:14.00/font-size:11.00/g' file.svg
Note: For viewing and editing SVG there is an excellent opensource tool called Inkscape (similar to Adobe Illustrator. For DOT processing you can also use Omnigraffle (on Mac OS X).
= Rake Tasks
As of Preston Lee's Rails 3/4 modifications, including RailRoady as a project development dependency will automatically add a set of rake tasks to your project. Sweet! (Run
rake -T to check them out.)
RailRoady has been tested with the following Ruby and Rails versions
There are no additional requirements (nevertheless, all your Rails application requirements must be installed).
In order to view/export the DOT diagrams, you'll need the processing tools from Graphviz.
= Website and Project Home
RailRoady is distributed under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
See LICENSE for details.
Copyright (c) 2007-2008 Javier Smaldone Copyright (c) 2009 Peter Hoeg Copyright (c) 2010 Preston Lee
See LICENSE for details.
Authors/Contributors (in approximate order of appearance):
- Javier Smaldone (javier |at| smaldone |dot| com |dot| ar)
- Elliot Smith
- Juan Ignacio Pumarino
- Hajime Baba
- Ana Nelson
- Peter Hoeg
- John McCaffrey
- David Jones
- Mike Dalessio
- Preston Lee and Lee Does, the vendor providing maintenance.
- Tim Harvey
- Atli Christiansen
- John Bintz (http://www.coswellproductions.com/)
And of course, many thanks to the many patch submitters and testers that make this possible!