fix 班级人数

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

@@ -97,6 +97,7 @@ public class ClassGroupTeacherMapperServiceImpl extends BaseServiceImpl<Long, Cl
     }
 
     @Override
+    @Transactional(rollbackFor = Exception.class)
     public int classGroupTeachersInsert(List<ClassGroupTeacherMapper> classGroupTeacherMapperList, boolean checkCourser) {
         String classGroupIds = classGroupTeacherMapperList.stream().map(classGroupTeacherMapper -> classGroupTeacherMapper.getClassGroupId().toString()).collect(Collectors.joining(","));
         //老师加入群组