app/views/activity_items/_feed.html.erb
<% if current_user.can?(:create, :note) %>
<div class="feed-add">
<%= render partial: 'activity_items/new_note_form', locals: { need: need } %>
</div>
<% end %>
<ul class="feed">
<%= render partial: 'activity_items/item', collection: activity_items %>
</ul>