  <td style="text-align: center;">
    <%= course.id %>
  </td>
  <td style="white-space: nowrap;overflow: hidden;text-overflow: ellipsis;" class="name" title='<%=course.name%>'>
            <span>
              <%= link_to(course.name, course_path(course.id)) %>
            </span>
  </td>
  <td align="center">
    <%= link_to(course.try(:teacher).try(:realname).truncate(6, omission: '...'), user_path(course.teacher)) %>
  </td>
  <td align="center">
    <%= studentCount(course) %>
  </td>
  <td class="center">
    <%= course.homework_commons.count%>
  </td>
  <td class="center">
    <%= student_works_num(course) %>
  </td>
  <td class="center">
    <%= visable_attachemnts_incourse(course).count%>
  </td>
  <td class="center">
    <%= course.boards.first.topics.count + Message.where("board_id =? and parent_id is not ?", course.boards.first.id, nil).count %>
  </td>
  <td class="center">
    <%= course.course_activities.count%>
  </td>
  <td class="buttons">
    <%= link_to( course.is_excellent == 1 || course.excellent_option == 1 ? "取消精品" : "设为精品", { :controller => 'admin', :action => 'set_excellent_course', :id => course.id },:remote=>true, :class => 'icon-del') %>
  </td>
