我如何从Rails中的url中猜出动作名称？

Question

For example I have a url generated by something_path or something_url methods. I need to know action name from that url .

Answer 1

You don't need to guess. You can run rake routes from the Terminal/Command Prompt to get a list of all the routes in your application. The output includes the HTTP method used, as well as the controller and action invoked.

Answer 2

The routing system of Rails works two ways, it recognizes and builds URLs. You need the recognize_path method, like the following example shows:

ActionController::Routing::Routes.recognize_path('/mycontroller/myaction', :method => :get)

Assuming that the URL was generated with something_path or something_url , it returns:

{ :action => 'myaction', :controller => 'mycontroller' }

From which you are able to extract the action part.

Answer 3

If you are in a view, you can use

• action_name to get access to the processing action
• controller_name to get access to the processing controller

Answer 4

In Rails 3:

Rails.application.routes.recognize_path("http://example.ltd/registrants")
=> => {:action=>"index", :controller=>"registrants"}

If you're in an engine, Events

Events::Engine.routes.recognize_path("/registrants")
=> {:action=>"index", :controller=>"events/registrants"}