<%= link_to image_tag(url_to_avatar(comment.user), :width => "33", :height => "33"), user_path(comment.user_id), :alt => "用户头像" %>
<% if comment.try(:user).try(:realname) == ' ' %>
<%= link_to comment.try(:user), user_path(comment.user_id), :class => "content-username" %>
<% else %>
<%= link_to comment.try(:user).try(:realname), user_path(comment.user_id), :class => "content-username" %>
<% end %>
<%= time_from_now(comment.created_on) %>
<%= comment.notes.html_safe %>