app/views/assignments/edit.erb
<h2><%= t('assignments.title') %></h2>
<ul class="nav nav-tabs">
<li> <%= link_to tag_icon(:list, pat(:list)), url(:assignments, :index, :course_id => current_course.id) %></li>
<li> <%= link_to tag_icon(:plus, pat(:new)), url(:assignments, :new, :course_id => current_course.id) %></li>
<li class="active"> <%= link_to tag_icon(:edit, pat(:edit)), url(:assignments, :edit, :id => @assignment.id, :course_id => current_course.id) %></li>
</ul>
<div class="tabs-content">
<% form_for :assignment, url(:assignments, :update, :id => @assignment.id, :course_id => current_course.id), :method => :put, :class => 'form-horizontal', :multipart => true do |f| %>
<%= partial 'assignments/form', :locals => { :f => f } %>
<% end %>
</div>