update

TEAMModelOS.SDK/Models/Service/GroupListService.cs

@@ -827,7 +827,7 @@ namespace TEAMModelOS.SDK
             List<RMember> rmembers = new List<RMember>();
             List<RGroupList> rgroupList = new List<RGroupList>();
             List<GroupListDto> groupListDtos = new List<GroupListDto>();
-            if (!string.IsNullOrWhiteSpace(school) && classes.IsNotEmpty() && time>0) {
+            if (!string.IsNullOrWhiteSpace(school)   && time>0) {
                 School schoolBase = await client.GetContainer(Constant.TEAMModelOS, Constant.School).ReadItemAsync<School>(school, new PartitionKey("Base"));
                 foreach (var period in schoolBase.period) {
                     var dataSemester = SchoolService.GetSemester(period, time);