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Can I get the name of the current controller in the view?

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误落风尘
误落风尘 2020-11-29 16:17

Is there a way to figure out what the current controller is from within the view?

For an example of why I would want to know this: if several controllers share the s

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  • 春和景丽
    2020-11-29 16:52

    controller_name holds the name of the controller used to serve the current view.

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  • 囚心锁ツ
    2020-11-29 16:53 
    #to get controller name:
<%= controller.controller_name %>
#=> 'users'

#to get action name, it is the method:
<%= controller.action_name %>
#=> 'show'


#to get id information:
<%= ActionController::Routing::Routes.recognize_path(request.url)[:id] %>
#=> '23'

# or display nicely
<%= debug Rails.application.routes.recognize_path(request.url) %>

    reference

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  • 清酒与你
    2020-11-29 16:55

    controller_path holds the path of the controller used to serve the current view. (ie: admin/settings).

    and

    controller_name holds the name of the controller used to serve the current view. (ie: settings).

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  • 野性不改
    2020-11-29 17:01

    If you want to use all stylesheet in your app just adds this line in application.html.erb. Insert it inside <head> tag

      <%= stylesheet_link_tag  controller.controller_name , media: 'all', 'data-turbolinks-track': 'reload' %>

    Also, to specify the same class CSS on a different controller
    Add this line in the body of application.html.erb 

      <body class="<%= controller.controller_name %>-<%= controller.action_name %>">

    So, now for example I would like to change the p tag in 'home' controller and 'index' action. Inside index.scss file adds.

    .nameOfController-nameOfAction <tag> { }

     .home-index p {
        color:red !important;
      }
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  • 一整个雨季
    2020-11-29 17:09

    In the Rails Guides, it says:

    The params hash will always contain the :controller and :action keys, but you should use the methods controller_name and action_name instead to access these values

    ActionController Parameters

    So let's say you have a CSS class active , that should be inserted in any link whose page is currently open (maybe so that you can style differently) . If you have a static_pages controller with an about action, you can then highlight the link like so in your view:

    <li>
  <a class='button <% if controller.controller_name == "static_pages" && controller.action_name == "about" %>active<%end%>' href="/about">
      About Us
  </a>
</li>
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