Ruby on rails 3 link_to controller and action

Question

I know this is probably a pretty simple concept. I am trying to create a link to a controller and action. For example I have a link in my layout file to update a record when

Answer 1

link_to "Label", :controller => :my_controller, :action => :index

See url_for.

Answer 2

Also with CSS:

<%= link_to "Purchase", { :controller => :transactions, :action => :purchase }, { class: "btn btn-primary btn-lg", style: "width: 100%;" } %>

Answer 3

If you want to pass params too then do

<%= link_to student.name,  controller: "users", action: "show", id: student.id, partial: "profile"  %>