carrierwave sinatra model id as storage dir

Question

如何使用sinatra创建rails可以为carrierwave提供的以下场景：

def store_dir
  "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
end

...能够将头像存储在使用模型ID命名的目录下。

Answer 1

应该检查维基：

https://github.com/jnicklas/carrierwave/wiki/How-to%3A-Make-a-fast-lookup-able-storage-directory-structure