server/AyaNova/DataList/DataListProcessingBase.cs

@@ -149,6 +149,12 @@ namespace AyaNova.DataList
                     if (!string.IsNullOrEmpty(o.EnumType))
                         sb.Append($",\"et\":\"{AyaNova.Util.StringUtil.TrimTypeName(o.EnumType)}\"");
 
+
+                    //field key needed for sorting etc
+                    sb.Append($",\"fk\":\"{o.FieldKey}\"");
+
+
+
                     sb.Append("}");
                     FirstColumnAdded = true;