1、添加教务老师字段

2、布置作业

mec-biz/src/main/java/com/ym/mec/biz/dal/dao/CoursesGroupDao.java

@@ -57,4 +57,6 @@ public interface CoursesGroupDao extends BaseDAO<Long, CoursesGroup> {
      * @return java.util.List<com.ym.mec.biz.dal.entity.CoursesGroup>
      */
     List<CoursesGroup> findNoStudentsGroups(@Param("startDate")Date startDate);
+
+    CoursesGroup lockGroup(@Param("groupId") Long groupId);
 }

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

@@ -334,9 +334,7 @@ public class CoursesGroupServiceImpl extends BaseServiceImpl<Long, CoursesGroup>
             throw new BizException("请指定课程组");
         }
 
-        studentDao.lockUser(userId);
-
-        CoursesGroup coursesGroup = coursesGroupDao.get(courseGroupId);
+        CoursesGroup coursesGroup = coursesGroupDao.lockGroup(courseGroupId);
         if(Objects.isNull(coursesGroup)){
             throw new BizException("此课程组不存在");
         }

mec-biz/src/main/resources/config/mybatis/CoursesGroupMapper.xml

@@ -33,6 +33,10 @@
 	<select id="get" resultMap="CoursesGroup" >
 		SELECT * FROM courses_group WHERE id_ = #{id} 
 	</select>
+
+	<select id="lockGroup" resultMap="CoursesGroup" >
+		SELECT * FROM courses_group WHERE id_ = #{groupId}
+	</select>
 	
 	<!-- 全查询 -->
 	<select id="findAll" resultMap="CoursesGroup">