反向导轨路由：从URL查找动作名称 [英] Reverse rails routing: find the action name from the URL

问题描述

我了解如何转换：controller ，：action， ：etc 转换为网址。我正在寻找相反的方向，如何从URL中找到Rails路由器将调用的操作？

解决方案

其他人可能有更短的方法来执行此操作，但是如果您只是在评估URL，则转到 ActionController :: Routing :: RouteSet 类

用于 config.routes.rb

  map.resources：sessions 
  

要查找的代码是：

  ActionController :: Routing :: Routes.recognize_path（'/ sessions / new'，{：method =>：get}）
 ＃=> {：controller => 会话，：action => 'new'} 
  

右：

  ActionController :: Routing :: Routes.recognize_path（'/ sessions / 1 / edit'，{：method =>：get}）
＃=> {：controller => 会话，：action => ‘edit’，：id => 1} 
  

错误-没有方法明确添加，它将默认匹配 /：controller /：action /：id ：

  ActionController :: Routing :: Routes.recognize_path（'/ sessions / 1 / edit'）
＃=> {：controller => 会话，：action => ‘1’，：id => 'edit'} 
  

如果您愿意采取行动，并且想知道，那就有点通过调用 params [：action]

更容易，您可以在此处找到有关路由集的所有信息：< a href = http://caboo.se/doc//classes/ActionController/Routing/RouteSet.html#M004878 rel = noreferrer> http://caboo.se/doc//classes/ActionController/Routing/ RouteSet.html＃M004878

希望这会有所帮助！

I understand how to turn :controller, :action, :etc into a URL. I'm looking to do the reverse, how can the action that the rails router will call be found from the URL?

解决方案

someone else might have a shorter way to do this, but if you are just evaluating a URL, then you go to the ActionController::Routing::RouteSet class

for a config.routes.rb

map.resources :sessions

the code to find is:

ActionController::Routing::Routes.recognize_path('/sessions/new', {:method => :get})
#=> {:controller => 'sessions', :action => 'new'}

Right:

ActionController::Routing::Routes.recognize_path('/sessions/1/edit', {:method => :get})
#=> {:controller => 'sessions', :action => 'edit', :id => 1}

Wrong - without the method being explicitly added, it will default match to /:controller/:action/:id:

ActionController::Routing::Routes.recognize_path('/sessions/1/edit')
#=> {:controller => 'sessions', :action => '1', :id => 'edit'}

If you are within the action and would like to know, it is quite a bit easier by calling params[:action]

everything you ever wanted to know about routeset can be found here: http://caboo.se/doc//classes/ActionController/Routing/RouteSet.html#M004878

Hope this helps!

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