Currently I have this in my layout:
<body class="<%= controller.controller_name %>">
I want to add an additional class that will be the same for all actions in any controller where it's set, something like:
class SomeController < ApplicationController
body_class 'page'
...
end
class AnotherController < ApplicationController
body_class 'page'
...
end
Which will result in:
<body class="some page">
<body class="another page">
What would be the easiest way to achieve this? Can I use controller class variables for this?
Stop! Stop! Use this pattern:
<body data-controller="#{controller.controller_path}" data-action="#{controller.action_name}">
Neat! ha?
And then in your document.ready fire whichever JS script you want for that controller-action combination... ( This can be auto-executed on document ready )
All credit goes to: http://viget.com/inspire/extending-paul-irishs-comprehensive-dom-ready-execution
and:
My solution:
Controller:
class SomeController < ApplicationController
before_filter lambda { @body_class = 'page' }
...
end
Layout:
<body class="<%= "#{controller.controller_name} #{@body_class}".strip %>">
The first thing that comes to mind is a layout for that controller. The second thing that comes to mind is a helper that checks the url and applies returns appropriate HTML.
class YourController < ApplicationController
layout "new_layout"
#...
end
I used @vincent 's way. Since I'm using Rails 5.2.0, before_filter is deprecated and has been replaced with before_action. I made a little change.
controller:
class SomeController < ApplicationController
before_action do
@body_class = 'page'
end
...
end
layout:
<body class="<%= "#{controller.controller_name} #{@body_class}".strip %>">
<body role="document" class="<%= controller.controller_path %> <%= controller.action_name %>" data-controller="<%= controller.controller_path %>" data-action="<%= controller.action_name %>
来源：https://stackoverflow.com/questions/4555632/body-class-for-controller-in-rails-app