ruby-on-rails-3 - 导轨 : How to get the controller & method name of Restfull named routes?

Question

在我的 HTML View 中

<% if check_link(dashboard_path) %>
  <%= link_to "Products", dashboard_path, class: controller_name == "dashboard" ? "active" : nil %>
<% end %>

在 check_link 辅助方法中:

  def check_link(path)
    controller_name = path.controller
    method_name = path.action

    then i have some extra access verification code ............

  end

但是，我在浏览器中收到如下错误:

undefined method `controller' for "/admin/dashboard":String

现在，我的问题是如何从“命名路由(dashboard_path)”中找到 Controller 和方法名称。请有人帮我解决这个问题。

Answer 1

您可以使用 Rails.application.routes.recognize_path 提取 :controller 和 :action

def check_link(path)
  extracted_path =  Rails.application.routes.recognize_path(path)


  controller = extracted_path[:controller]
  action = extracted_path[:action]

  # your rest of the codes goes here
end

示例

Rails.application.routes.recognize_path('/parties/autocomplete_party_name_last', {:method => :get})

# Output will be    
{:action=>"autocomplete_party_name_last", :controller=>"parties"}

OR 

Rails.application.routes.recognize_path('/transcriptions/2/edit')

# Output will be    
=> {:action=>"edit", :controller=>"transcriptions", :id=>"2"}

如果你的路径不正确，那么你会得到这样的结果:

Rails.application.routes.recognize_path('dashboards/index')

# output will be
=> {:controller=>"pages", :action=>"page_not_found", :url=>"dashboards/index"}

希望您觉得这很有用。