反向 rails 路由:从 URL 中查找操作名称 [英] Reverse rails routing: find the action name from the URL

问题描述

我了解如何将 :controller、:action、 :etc 转换为 URL.我正在寻找相反的方法，如何从 URL 中找到 rails 路由器将调用的操作?

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?

推荐答案

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

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

对于 config.routes.rb

map.resources :sessions

要查找的代码是:

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

对:

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

错误 - 如果没有显式添加 method，它将默认匹配 /:controller/:action/:id:

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'}

如果您在操作中并想知道，调用 params[:action]

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

你想知道的关于路由集的一切都可以在这里找到:http://caboo.se/doc//classes/ActionController/Routing/RouteSet.html#M004878

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

希望这有帮助！

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