Merge branch 'saas' of http://git.dayaedu.com/yonge/mec into saas

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

@@ -566,9 +566,10 @@ public class IndexBaseMonthDataServiceImpl extends BaseServiceImpl<Long, IndexBa
 		//云教练新用户人数
 		if(CollectionUtils.isEmpty(dataTypes)||dataTypes.contains(IndexDataType.CLOUD_NEW_STUDENT_NUM)) {
 			List<Integer> studentIdList = studentRegistrationDao.findStudentIds(tenantId);
-			saveData(studentDao.groupOrganId(null,studentIdList),LocalDate.now().toString(),IndexDataType.CLOUD_NEW_STUDENT_NUM, tenantId);
+			if(!CollectionUtils.isEmpty(studentIdList)){
+				saveData(studentDao.groupOrganId(null,studentIdList),LocalDate.now().toString(),IndexDataType.CLOUD_NEW_STUDENT_NUM, tenantId);
+			}
 		}
-
 	}
 
 	/**