Ruby on rails Ruby on Rails 4无法通过自动加载路径自动加载常量

如能收到关于解决以下错误的建议，我将不胜感激

config/application.rb

...
   config.autoload_paths += %W["#{config.root}/app/packages/"]
...

...
def package_handler_by_name(name)
  "#{name}_package".classify.constantize.new    
end
...

helpers/application.rb

...
   config.autoload_paths += %W["#{config.root}/app/packages/"]
...

...
def package_handler_by_name(name)
  "#{name}_package".classify.constantize.new    
end
...

控制器/程序包\u controller.rb

...
include ApplicationHelper
...
    def get_packages
      @package_handlers = {}
      @package_names = Dir.glob("#{::Rails.application.config.root}/app/packages/*.rb").map {
        |f| 
          name = File.basename(f).chomp("_package.rb")
          @package_handlers[name] = package_handler_by_name(name) **error**
          name
    }
    end
...

追溯到标有错误的行时出错

Unable to autoload constant SubscriptionPackage, expected /home/ubuntu/workspace/sample_app/app/packages/subscription_package.rb to define it

---

当然，packages/subscription\u package.rb存在（否则我们会在前一行收到错误）。

subscription\u package.rb中有一个输入错误的类名。

---

案例结束，非常感谢Leito指出。

您能给我们看看subscription\u package.rb的内容吗