For the following code:
<%= link_to "Some Page", some_path %>
How do I apply a css class current
using the current_page?
helper method?
Or if some other better way is available?
In app/helpers/application_helper.rb
def cp(path) "current" if current_page?(path) end
In your views:
<%= link_to "All Posts", posts_path, class: cp(posts_path) %>
Basically write a simple wrapper around it. Additionally you could extend the method to allow additional classes to be applied by adding arguments. Keeps the views concise/dry. Or, without extending the method, you could just do simple String interpolation like so to add additional classes:
<%= link_to "All Posts", posts_path, class: "#{cp(posts_path)} additional_class" %>
In my case I have a lot of name spaced controllers, that is why I like to show if the current view also is in the Menu Path, I had use the solution of Michael van Rooijen and then I customize for my case.
def cp(path)
"current" if request.url.include?(path)
end
<%= link_to "All Posts", posts_path, class: cp(posts_path) %>
Now if my menu bar is /users and my current page is /users/10/post also the link /users is set with "current" class
I branched off of Michael's answer and tweaked the helper:
def active_class?(*paths)
active = false
paths.each { |path| active ||= current_page?(path) }
active ? 'active' : nil
end
Here's how you'd use it:
<%= link_to "Bookings", bookings_path, class: active_class?(bookings_path) %>
You can pass multiple paths to it in case you have a tab which could be rendered by multiple views:
<%= content_tag :li, class: active_class?(bookings_path, action: 'new') %>
And the great thing about this is if the conditions are false
, it will insert nil
. Why is this good? Well, if you provide class
with nil
it won't include the class attribute on the tag at all. Bonus!
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