-<%= image_tag trace_icon_url(description.user, description.id) %>
-<% if description.size -%>
-<%= t ".description_with_count", :count => description.size, :user => description.user.display_name %>
+<%= image_tag trace_icon_url(trace.user, trace) %>
+<% if trace.size -%>
+<%= t ".description_with_count", :count => trace.size, :user => trace.user.display_name %>