update

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

@@ -168,8 +168,10 @@ public class TeacherAttendanceServiceImpl extends BaseServiceImpl<Long, TeacherA
 			teacherAttendance=teacherSignOutDto.getTeacherAttendanceInfo();
 			teacherAttendance.setTeacherId(user.getId());
 			teacherAttendance.setCreateTime(date);
-		}else if(teacherAttendance.getSignInTime() != null && teacherAttendance.getSignOutTime() != null){
+		}else if(teacherAttendance.getSignInTime() != null){
 			throw new BizException("当前课程已签到");
+		} else if (teacherAttendance.getSignOutTime() != null) {
+			throw new BizException("当前课程已签退");
 		}
 
 		TeacherAttendanceDto currentCourseDetail = courseScheduleDao.getCurrentCourseDetail(teacherSignOutDto.getTeacherAttendanceInfo().getCourseScheduleId(),user.getId());