<%= link_to image_tag(url_to_avatar(@activity.author), :width => "90", :height => "90"), user_path(@activity.author_id), :alt => "用户头像" %>
<% if @activity.try(:author).try(:realname) == ' ' %> <%= link_to @activity.try(:author), user_path(@activity.author_id), :class => "newsBlue mr15" %> <% else %> <%= link_to @activity.try(:author).try(:realname), user_path(@activity.author_id), :class => "newsBlue mr15" %> <% end %> TO <%= @activity.course.name %>(课程名称)
<%= @activity.title %>（通知标题）
发布时间：<%= format_date(@activity.created_on) %>
（通知描述）<%= @activity.description.html_safe %>