如果你想在视图中对某些东西进行特殊处理，你可以使用current_page?如:

<% if current_page?(:controller => 'users', :action => 'index') %>

.．.或者一个动作和id。

<% if current_page?(:controller => 'users', :action => 'show', :id => 1) %>

.．.或者一条命名的路线……

<% if current_page?(users_path) %>

…

<% if current_page?(user_path(1)) %>

因为current_page ?需要控制器和动作，当我只关心控制器时，我做一个current_controller?方法:

  def current_controller?(names)
    names.include?(current_controller)
  end

像这样使用它:

<% if current_controller?('users') %>

.．.这也适用于多个控制器名称…

<% if current_controller?(['users', 'comments']) %>

我假设你指的是URI:

class BankController < ActionController::Base
  before_filter :pre_process 

  def index
    # do something
  end

  private
    def pre_process
      logger.debug("The URL" + request.url)
    end
end

根据你下面的评论，如果你需要控制器的名称，你可以简单地这样做:

  private
    def pre_process
      self.controller_name        #  Will return "order"
      self.controller_class_name  # Will return "OrderController"
    end

要查找URI:

current_uri = request.env['PATH_INFO']
# If you are browsing http://example.com/my/test/path, 
# then above line will yield current_uri as "/my/test/path"

找到路径，即控制器，动作和参数:

path = ActionController::Routing::Routes.recognize_path "/your/path/here/"

# ...or newer Rails versions:
#
path = Rails.application.routes.recognize_path('/your/path/here')

controller = path[:controller]
action = path[:action]
# You will most certainly know that params are available in 'params' hash

我找到了批准的答案，请求。env['PATH_INFO']，用于获取基本URL，但如果你有嵌套路由，它并不总是包含完整路径。你可以使用request。env['HTTP_REFERER']获取完整路径，然后查看它是否匹配给定的路由:

request.env['HTTP_REFERER'].match?(my_cool_path)

你可以这样做

Rails.application.routes.recognize_path "/your/path"

它在rails 3.1.0.rc4中为我工作

或者更优雅地说:request.path_info

来源: 请求机架文档