我该如何处理类似文件夹的模型结构？

Question

我有这个Rails的模型：（为清楚起见移除参数）

class Folder < ActiveRecord::Base 
    belongs_to :parent, :class_name => :folder 
    has_many :children, :class_name => :folder 
end 

我要像使用文件系统文件夹这种模式。我该如何配置路线和控制器才能实现这一点？

Answer 1

1）对于型号：退房acts_as_tree

2）对于路线：这样做

map.folder '/folders/*path', :controller => 'folders', :action => 'show' 

，并在FoldersController，

def show 
    # params[:path] contains an array of folder names 
    @folder = Folder.root 
    params[:path].each |name| 
    @folder = @folder.children.find_by_name(name) or raise ActiveRecord::RecordNotFound 
    end 
    # there you go, @folder contains the folder identified by the path 
end