HAML and Ruby loop and UL not working

问题

I'm trying to get this simple list working, but the ul is closing and not enclosing the li elements in the loop. Am I missing a simple way to do this?

  %ul.nav.nav-tabs.nav-stacked
   - @courses.each do |c|
   %li
    = link_to "add", { :controller => "admin/relateds", :action => "edit", :id => c.id }, :confirm => "Are you sure?"
    = c.coursetitle

回答1:

The %li needs indentation because it is within a do block. Even if it is valid markup it will save you debugging time if you opt to use 2 or 4 spaces for indentation for better legibility, as one is very difficult to discern.

%ul.nav.nav-tabs.nav-stacked
  - @courses.each do |c|
    %li
      = link_to "add", { :controller => "admin/relateds", :action => "edit", :id => c.id }, :confirm => "Are you sure?"
      = c.coursetitle

回答2:

you need to indent the %li and what's supposed to be inside. Currently your loop does nothing.

来源：https://stackoverflow.com/questions/10192764/haml-and-ruby-loop-and-ul-not-working