fix filtered Attributes - load nothing if empty array or only invalid ids

entity/AttributeRelation_entity/recordcontainers/jdito/contentProcess.js

@@ -76,15 +76,18 @@ else if (showEmpty || objectRowId)
         
         attributeCond.andIn("AB_ATTRIBUTE.AB_ATTRIBUTEID", possibleAttributes);
     }
-    if (vars.exists("$param.FilteredAttributeIds_param") && vars.getString("$param.FilteredAttributeIds_param"))
+    if (vars.getString("$param.FilteredAttributeIds_param"))
     {
         let filteredIds = JSON.parse(vars.getString("$param.FilteredAttributeIds_param"));
 
         let filteredCondition = new SqlCondition();
         let filteredIdChildren = AttributeUtil.getAllChildren(filteredIds);
         
-        filteredCondition.andIn("AB_ATTRIBUTE.AB_ATTRIBUTEID", filteredIdChildren);
-        filteredCondition.andPrepare("AB_ATTRIBUTE.ATTRIBUTE_TYPE", $AttributeTypes.COMBOVALUE, "# != ?")
+        if (filteredIdChildren.length > 0)
+        {
+            filteredCondition.andIn("AB_ATTRIBUTE.AB_ATTRIBUTEID", filteredIdChildren)
+                             .andPrepare("AB_ATTRIBUTE.ATTRIBUTE_TYPE", $AttributeTypes.COMBOVALUE, "# != ?");
+        }
     
         // return nothing if filteredAttributeIds is an empty array. (--> and 1=2)
         attributeCond.andSqlCondition(filteredCondition, "1=2");