处理classes为空

TEAMModelFunction/TriggerStuActivity.cs

@@ -37,7 +37,7 @@ namespace TEAMModelFunction
         }
          
         public  static async Task<(List<string> tmdids,List<Students> studentss)> GetStuList(  CosmosClient client, List<string> classes,string  school) {
-
+            if (!classes.IsNotEmpty()) { return (null, null); }
             List<Students> studentss = new List<Students>();
             List<string> sqlList = new List<string>();
             classes.ForEach(x => { sqlList.Add($" '{x}' "); });