ruby - 运行 rake erd 命令时失败 : RuntimeError: Saving diagram failed!

Question

我正在尝试使用 erd 为我的 Rails 应用程序中的模型生成图表。我在 Windows 7 上并安装了 graphviz

当我运行时

rake erd OR rake erd filetype=dot

出现以下错误

$ rake erd --trace
** Invoke erd (first_time)
** Invoke erd:generate (first_time)
** Invoke erd:options (first_time)
** Execute erd:options
** Invoke erd:load_models (first_time)
** Execute erd:load_models
Loading application environment...
** Invoke environment (first_time)
** Execute environment
Loading code in search of Active Record models...
** Execute erd:generate
Generating Entity-Relationship Diagram for 6 models...
rake aborted!
Saving diagram failed!
Verify that Graphviz is installed and in your path, or use filetype=dot.
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-erd-1.1.0/lib/rails_erd/diagram/graphviz.rb:198:in `r
escue in block in <class:Graphviz>'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-erd-1.1.0/lib/rails_erd/diagram/graphviz.rb:190:in `b
lock in <class:Graphviz>'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-erd-1.1.0/lib/rails_erd/diagram.rb:142:in `instance_e
val'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-erd-1.1.0/lib/rails_erd/diagram.rb:142:in `save'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-erd-1.1.0/lib/rails_erd/diagram.rb:120:in `create'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-erd-1.1.0/lib/rails_erd/diagram.rb:74:in `create'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-erd-1.1.0/lib/rails_erd/tasks.rake:41:in `block (2 le
vels) in <top (required)>'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:228:in `call'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:228:in `block in execute'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:223:in `each'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:223:in `execute'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:166:in `block in invoke_with_c
all_chain'
c:/Ruby193/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:159:in `invoke_with_call_chain
'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:187:in `block in invoke_prereq
uisites'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:185:in `each'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:185:in `invoke_prerequisites'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:165:in `block in invoke_with_c
all_chain'
c:/Ruby193/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
c:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:159:in `invoke_with_call_chain

有人遇到过此类问题吗？

Answer 1

我在 OS 10.9.2 上遇到了同样的问题。

解决方案

brew install graphviz

创建 erd - 在 Rails 4 上工作

erd --inheritance --direct --attributes=foreign_keys,content --filetype=dot
dot -Tjpg erd.dot > erd.jpg

您也可以将 jpg 替换为 pdf