试卷列表报500

app/views/exercise/_student_exercise.html.erb

@@ -34,8 +34,8 @@
               <%= link_to exercise.user.show_real_name, user_path(exercise.user),:class=>"color-grey-3" %>
             </td>
             <% member = @course.members.where(:user_id => exercise.user_id).first %>
-            <td title="<%= member.try(:course_group_id).to_i == 0 ? '未分班' : member.course_group.name %>">
-              <span class="task-hide" style="display: block;max-width: 120px;"><%= member.try(:course_group_id).to_i == 0 ? '未分班' : member.course_group.name %></span>
+            <td title="<%= member.try(:course_group_id).to_i == 0 ? '未分班' : member.course_group.try(:name) %>">
+              <span class="task-hide" style="display: block;max-width: 120px;"><%= member.try(:course_group_id).to_i == 0 ? '未分班' : member.course_group.try(:name) %></span>
             </td>
             <% if User.current.admin || User.current.member_of_course?(@course) %>
               <td title="<%= exercise.user.user_extensions.nil? ? "--" : exercise.user.user_extensions.student_id %>">