update

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

@@ -1444,6 +1444,7 @@ public class ClassGroupServiceImpl extends BaseServiceImpl<Integer, ClassGroup>
         List<Integer> studentIdList = classGroup4MixDto.getStudents();
         List<StudentRegistration> studentList = studentRegistrationService.findStudentListByUserIdList(musicGroupId, studentIdList);
 
+
         List<Integer> subjectIdList = studentList.stream().map(student -> student.getActualSubjectId()).collect(Collectors.toList());
         TeachModeEnum teachMode = TeachModeEnum.OFFLINE;
         if (classGroup4MixDto.getType().equals(ClassGroupTypeEnum.HIGH_ONLINE)) {