[Projekt: Entwicklung - Neon][TicketNr.: 1081390][Firmenlookup öffnet sich +...

[Projekt: Entwicklung - Neon][TicketNr.: 1081390][Firmenlookup öffnet sich + Fehlermeldung in Endlosschleife] Check existence of variables before accessing them

There are certain cases where *.insertedRows/*.changedRows/*.deletedRows variables are NOT available. Therefore an existence check is necessary before accessing them.
One specific case is the following: The "valueProcess" of a parameter in a consumer needs to access any of the above listed variables of another consumer field. This basically works just fine. BUT as soon as you're in a Lookup, the consumer might not be available, therefore the existence check is necessary to prevent an exception.

process/Entity_lib/process.js

@@ -504,10 +504,28 @@ EntityConsumerRowsHelper.prototype.fetchRowsFromConsumer = function (pFields)
  */
 EntityConsumerRowsHelper.prototype.applyConsumerRowChanges = function ()
 {
-    var insertedRows = vars.get("$field." + this._consumer + ".insertedRows");
-    var changedRows = vars.get("$field." + this._consumer + ".changedRows");
-    var deletedRows = vars.get("$field." + this._consumer + ".deletedRows");
+    var insertedRows =  null;
+    var changedRows = null;
+    var deletedRows = null;
     
+    // As soon as you're in a Lookup, the consumer might not be available.
+    // Therefore, the existence check for each variable is necessary to prevent an exception.
+    
+    if (vars.exists("$field." + this._consumer + ".insertedRows"))
+    {
+        insertedRows = vars.get("$field." + this._consumer + ".insertedRows")
+    }
+    
+    if (vars.exists("$field." + this._consumer + ".changedRows"))
+    {
+        changedRows = vars.get("$field." + this._consumer + ".changedRows")
+    }
+    
+    if (vars.exists("$field." + this._consumer + ".deletedRows"))
+    {
+        deletedRows = vars.get("$field." + this._consumer + ".deletedRows")
+    }
+        
     if (deletedRows && deletedRows.length > 0)
         this.removeRows(deletedRows);
     if (changedRows && changedRows.length > 0)