A tool to automatically generate a UML diagram for a Rails Application

Question

Looking for a good tool/gem that can automatically generate a nice looking UML diagram for an existing rails application.

(Im imagining such a tool would read the schema.rb file and then scan the models for relationships)

ProTip: If you can't get these tools working, double check your models and make sure you have all your belongs_to and has_many etc. matching up nicely between models. — Evolve, Jan 29 '11 at 14:22

score 18 · Accepted Answer · answered Jan 27 '11 at 16:32

18

For Rails 3, try Railroady, it's maintained as well.

answered Jan 27 '11 at 16:32

Tom Hartwell

2

I switched to RailRoady from Rails-ERD (had problems with its rake tasks) - it has support for Rails 4 also. – Bartłomiej Skwira Nov 19 '13 at 12:16

score 17 · Answer 2 · answered Jan 29 '11 at 14:16

17

You could try Rails ERD as a an alternative to Railroad. It is maintained and works specifically for Rails 3.

answered Jan 29 '11 at 14:16

Evolve

Last commit 10 months ago, might not be maintained any more. – Bartłomiej Skwira Nov 19 '13 at 12:15

score 12 · Answer 3 · answered Sep 14 '10 at 03:56

12

RubyMine has a tool to do this; they call it a "model dependency diagram", but it generates a UML-like graph for your application models.

If you don't want to use RubyMine, check out RailRoad. It's a standalone tool that does similar, though RubyMine's is prettier, IMO.

answered Sep 14 '10 at 03:56

Chris Heald

2

RailRoad has not been updated in the last two years so probably not the best option – Jordi Cabot Sep 14 '10 at 10:01
@Jordi Cabot exactly, I tried it approximately a year ago and it was not working – Gabriel Ščerbák Sep 14 '10 at 10:14
1

You could try [Rails ERD](http://rails-erd.rubyforge.org/) as a an alternative to Railroad. It is maintained and works specifically for Rails 3. – molf Nov 24 '10 at 00:02
@molf: Im going to keep the accept with Chris, as he was the best/only answer at the time of asking. But I'll copy your answer out to another Answer so the community can upvote whichever option is best.. (If u want points or something, you make your own and Ill delete mine if it's an issue). Thanks for your suggestions! – Evolve Jan 29 '11 at 14:13
In case anyone can't find this, here's the docs https://www.jetbrains.com/help/pycharm/2016.3/viewing-model-dependency-diagram.html shift-option-command-u – Andy Ray Feb 28 '17 at 18:32

3 Answers3