1、添加教务老师字段

2、布置作业

mec-biz/src/main/java/com/ym/mec/biz/service/impl/GroupClassServiceImpl.java

@@ -147,9 +147,6 @@ public class GroupClassServiceImpl implements GroupClassService {
             if(Objects.isNull(coursesGroup)){
                 throw new BizException("指定的课程组不存在");
             }
-            if(coursesGroup.getCoursesEndDate().before(now)){
-                throw new BizException("当前课程组不可关闭");
-            }
             if(coursesGroup.getStatus().equals(GroupStatusEnum.CANCEL)){
                 throw new BizException("此课程组已关闭");
             }