<%= link_to image_tag(url_to_avatar(activity.teacher), :width => "50", :height => "50"), user_path(activity.tea_id), :alt => "用户头像" %>
<%= render :partial => 'users/show_detail_info', :locals => {:user => activity.teacher} %>
<% if activity.try(:teacher).try(:realname) == ' ' %>
<%= link_to activity.try(:teacher), user_path(activity.tea_id), :class => "newsBlue mr15" %>
<% else %>
<%= link_to activity.try(:teacher).try(:realname), user_path(activity.tea_id), :class => "newsBlue mr15" %>
<% end %>
TO
<%= link_to activity.name.to_s+" | 班级", course_path(activity.id,:host=>Setting.host_course), :class => "newsBlue ml15" %>
<%= link_to activity.name, course_path(activity.id,:host=>Setting.host_course), :class => "postGrey" %>
创建时间：<%= format_time(activity.created_at) %>