app/views/learning_unit/_add_learning_units_form.html.erb
<% @lu = LearningUnit.new %>
<h3>Add Learning Content</h3>
<ul class="nav nav-list">
<%= form_for @lu do |f| %>
<div class="control-group">
<li class="nav-header"><%= f.label :url, "Add Url", class: 'control-label' %></li>
<div class="controls">
<%= f.text_field :url, class: 'text-field', placeholder: 'e.g. http://adrianmejia.com' %>
</div>
</div>
<div class="control-group">
<li class="nav-header"><%= f.label :file, "Upload File", class: 'control-label' %></li>
<div class="control">
<%= f.file_field :file, class: 'file-upload input-file' %>
</div>
</div>
<% end %>
</ul>