Rubyonrails 默认情况下 haml

是否有一种方法可以将rails配置为默认使用haml，即当生成脚手架时，会生成相应的scaffold_name/index.html.haml而不是scaffold_name/index.html.erb.

类似于将config.sass.preferred_syntax = :sass添加到config/application.rb，并在默认情况下生成scaffold_name.sass.

try 将以下内容添加到config/application.rb

config.generators do |g| 
  g.template_engine :haml
end

但我发现了以下几点

$ rails generate scaffold foo name:string
  invoke  active_record
  create    db/migrate/20120208152550_create_foos.rb
  create    app/models/foo.rb
  invoke    test_unit
  create      test/unit/foo_test.rb
  create      test/fixtures/foos.yml
   route  resources :foos
  invoke  scaffold_controller
  create    app/controllers/foos_controller.rb
   error    haml [not found]
  invoke    test_unit
  create      test/functional/foos_controller_test.rb
  invoke    helper
  create      app/helpers/foos_helper.rb
  invoke      test_unit
  create        test/unit/helpers/foos_helper_test.rb
  invoke  assets
  invoke    coffee
  create      app/assets/javascripts/foos.js.coffee
  invoke    sass
  create      app/assets/stylesheets/foos.css.sass
  invoke  sass
  identical    app/assets/stylesheets/scaffolds.css.sass
$ rails destroy scaffold foo                                                                                                                        
  invoke  active_record
  remove    db/migrate/20120208152550_create_foos.rb
  remove    app/models/foo.rb
  invoke    test_unit
  remove      test/unit/foo_test.rb
  remove      test/fixtures/foos.yml
   route  resources :foos
  invoke  scaffold_controller
  remove    app/controllers/foos_controller.rb
   error    haml [not found]
  invoke    test_unit
  remove      test/functional/foos_controller_test.rb
  invoke    helper
  remove      app/helpers/foos_helper.rb
  invoke      test_unit
  remove        test/unit/helpers/foos_helper_test.rb
  invoke  assets
  invoke    coffee
  remove      app/assets/javascripts/foos.js.coffee
  invoke    sass
  remove      app/assets/stylesheets/foos.css.sass
  invoke  sass

我创建了一个很好的小bundle命令，在this个屏幕播放之后用haml文件替换所有erb，但我仍然对在创建脚手架时将其设置为默认值感兴趣！我怎样才能让它成为haml文件(而不是erb！)是默认生成的吗？