= RailRoad

RailRoad generates models and controllers diagrams in DOT language for a
Rails application.


= Usage

Run RailRoad on 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.

    railroad [options] command

== Options

Common options:
    -b, --brief                      Generate compact diagram
                                       (no attributes nor methods)
    -e, --exclude file1[,fileN]      Exclude given files
    -c, --class-map file1,MyClass1[,fileN,MyClassN]
                                     Map files to classes they contain
    -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
    -v, --verbose                    Enable verbose output
                                       (produce messages to STDOUT)
    -u, --yuml                       Produce yuml instead of DOT
                                       (for http://yuml.me)


Models diagram options:
    -a, --all                        Include all models
                                       (not only ActiveRecord::Base derived)
        --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
    -y, --libraries                  Include application library
    -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

Other options:
    -h, --help                       Show this message
        --version                    Show version and copyright

== Commands

    -M, --models                     Generate models diagram
    -C, --controllers                Generate controllers diagram
    -A, --aasm                       Generate "acts as state machine" diagram
    -L, --lifecycle                  Generate Hobo::Lifecycle state machine diagram


== Examples

    railroad -o models.dot -M
      Produces a models diagram to the file 'models.dot'
    railroad -a -i -o full_models.dot -M
      Models diagram with all classes showing inheritance relations
    railroad -M | dot -Tsvg > models.svg
      Model diagram in SVG format
    railroad -M -u 
      Print yuml format diagram, used by http://yuml.me
    railroad -C | neato -Tpng > controllers.png
      Controller diagram in PNG format
    railroad -h
      Shows usage help


= Processing DOT files

To produce a PNG image from model diagram generated by RailRoad 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
    sed -i 's/font-size:14.00/font-size:11px/g' file.svg  # alternative

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).

= validation_reflection

If you have the
[validation_reflection](http://github.com/redinger/validation_reflection/tree/master)
plugin installed, your model ERD diagrams will properly distinguish
between required and optional associations.

Required associations are those that contain a
*validates_presence_of*, *validates_existence_of*,
*validates_associated*, or *validates_length_of* validation.

= RailRoad as a rake task

This version of railroad also works as a plugin.

    script/plugin install git://github.com/bryanlarsen/railroad.git
   
`rake doc:diagrams` produces 'doc/diagrams/models.svg',
'doc/diagrams/controllers.svg', and 'doc/diagrams/states.svg' and 
'doc/diagrams/lifecycle.svg'

Update 'lib/railroad/tasks/diagrams.rake' to change the options for
your diagrams.
 
Running RailRoad as a rake task ensures that all of your plugins are
loaded correctly, and may work when railroad from the command line
fails.

These rake tasks are also available if you install railroad as a gem.
In that case, add to your top-level Rakefile:

    require 'railroad/tasks/diagrams'

= Requirements

RailRoad has been tested with Ruby 1.8.5 and Rails 1.1.6 to 1.2.3
applications. There is 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

http://railroad.rubyforge.org

= License

RailRoad 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.

= Author

Javier Smaldone
(javier -at- smaldone -dot- com -dot- ar, http://blog.smaldone.com.ar )

== Contributors

Thomas Ritz         http://www.galaxy-ritz.de
Tien Dung           http://github.com/tiendung
Factory Design Labs http://github.com/factorylabs
Mike Mondragon      http://github.com/monde
Tero Tilus          http://github.com/terotil
Bruno Michel        http://github.com/nono
Bryan Larsen        http://github.com/bryanlarsen
Allen Wei           http://github.com/allenwei