How to get request's target controller and action with Rails 3?

问题

In the application controller before filter.

class ApplicationController < ActionController::Base
  before_filter :authenticate

  def authenticate
    # How do we know which controller and action was targetted?
  end
end

回答1:

class ApplicationController < ActionController::Base
  before_filter :authenticate

  def authenticate
    # How do we know which controller and action was targetted?
    params[:controller]
    params[:action]
    # OR
    controller.controller_name
    controller.action_name    
  end
end

回答2:

In Rails 3.2 you no longer need to call controller.action_name explicitly instead just "action_name".

before_filter :check_if_locked


def check_if_locked
  puts action_name
  puts controller_name
end

回答3:

You can get full url object using

url = Rails.application.routes.recognize_path(request.env['PATH_INFO'])

now you can get components as

url[:controller]

url[:action]

By default you can also use params[:controller] and params[:action] respectively during request/response life cycle.

回答4:

request.parameters['controller']
request.parameters['action']

来源：https://stackoverflow.com/questions/5418454/how-to-get-requests-target-controller-and-action-with-rails-3