server/AyaNova/DataList/AyaDataList.cs

@@ -51,6 +51,7 @@ namespace AyaNova.DataList
 
             sb.Append("[");
 
+            bool FirstColumnAdded = false;
 
             foreach (string s in ListViewFieldKeys)
             {
@@ -66,6 +67,7 @@ namespace AyaNova.DataList
                 if (o != null)
                 {//Here is where we can vet the field name, if it doesn't exist. For production we'll just ignore those ones
 
+                    if (!FirstColumnAdded)
                         sb.Append(",");
                     sb.Append("{");
                     //Build required part of column definition
@@ -76,7 +78,8 @@ namespace AyaNova.DataList
                         sb.Append($",\"ay\":{(int)o.AyaObjectType}");
 
                     //Row ID column?
-                    if(o.IsRowId){
+                    if (o.IsRowId)
+                    {
                         sb.Append($",\"rid\":1");
                     }
 
@@ -85,6 +88,7 @@ namespace AyaNova.DataList
                         sb.Append($",\"et\":\"{AyaNova.Util.StringUtil.TrimTypeName(o.EnumType)}\"");
 
                     sb.Append("}");
+                    FirstColumnAdded = true;
 
                 }
             }