Can I get the name of the current controller in the view?
Ruby on-RailsModel View-ControllerViewControllerRuby on-Rails Problem Overview
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 same layout, I may have a part in the layout ERB file where I want to highlight the current page's menu item based on the controller.
Maybe that is a bad approach. If so, what is the more preferred way to do this?
I'm interested to know about getting the name of the current controller either way, though.
(Obviously I could put something like @controller_name = 'users' in each controller; but that seems like the sort of thing Rails would've already done behind the scenes. So I'm just wondering if there's a built-in way.)
Ruby on-Rails Solutions
Solution 1 - Ruby on-Rails
controller_name holds the name of the controller used to serve the current view.
Solution 2 - Ruby on-Rails
Use controller.controller_name
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
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>
Solution 3 - Ruby on-Rails
#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) %>
Solution 4 - Ruby on-Rails
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).
Solution 5 - Ruby on-Rails
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;
}