课程列表的资源数显示不对

app/views/users/_courses_list.html.erb

@@ -13,7 +13,7 @@
               </div>
               <div class="">
                 <p class="fl grayTxt ">更新：<%=format_date Time.at(course.updatetime) %><span class="mr10"></span>学期：<%=current_time_and_term(course) %></p>
-                <p class="list-info fr grayTxt"><span><%=studentCount course %></span><span>学生</span><span>|</span><span><%=visable_course_homework course %></span><span>作业</span><span>|</span><span><%=visable_attachemnts_incourse(@course).count %></span><span>资源</span></p>
+                <p class="list-info fr grayTxt"><span><%=studentCount course %></span><span>学生</span><span>|</span><span><%=visable_course_homework course %></span><span>作业</span><span>|</span><span><%=visable_attachemnts_incourse(course).count %></span><span>资源</span></p>
                 <div class="cl"></div>
               </div>
             </div>