相关疑难解决方法(0)

这是各种输出

railroad -M | dot -Tsvg > models.svg
/Users/me/.rvm/gems/ruby-1.9.2-p290/gems/railroad-0.5.0/lib/railroad/app_diagram.rb:54:in `disable_stdout': uninitialized constant AppDiagram::PLATFORM (NameError)
from /Users/me/.rvm/gems/ruby-1.9.2-p290/gems/railroad-0.5.0/lib/railroad/app_diagram.rb:72:in `load_environment'
from /Users/me/.rvm/gems/ruby-1.9.2-p290/gems/railroad-0.5.0/lib/railroad/app_diagram.rb:18:in `initialize'
from /Users/me/.rvm/gems/ruby-1.9.2-p290/gems/railroad-0.5.0/lib/railroad/models_diagram.rb:14:in `initialize'
from /Users/me/.rvm/gems/ruby-1.9.2-p290/gems/railroad-0.5.0/bin/railroad:36:in `new'
from /Users/me/.rvm/gems/ruby-1.9.2-p290/gems/railroad-0.5.0/bin/railroad:36:in `<top (required)>'
from /Users/me/.rvm/gems/ruby-1.9.2-p290/bin/railroad:19:in `load'
from /Users/me/.rvm/gems/ruby-1.9.2-p290/bin/railroad:19:in `<main>'

版本

me$ ruby -v
  ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin11.1.0]
me$ rvm -v
  rvm 1.8.0 by Wayne E. Seguin (wayneeseguin@gmail.com) [https://rvm.beginrescueend.com/]

me$ rails -v
  Rails 3.0.10

每个命令都给我同样的问题:

• 铁路-o models.dot -M

• 铁路-a -i -o full_models.dot -M

• 铁路-M | dot -Tsvg> models.svg

• 铁路-C | neato …

我想生成图形来描述使用ActiveRecord的应用程序内的关系,是否有一些宝石可以实现这一点？

比如这个