Fixed bug in exists function.

Author: RoelantVos

ClassLibrary/DataWarehouseAutomation/DataWarehouseAutomation/HandleBarsHelpers.cs

@@ -257,9 +257,9 @@ public static void RegisterHandleBarsHelpers()
                 var searchString = arguments[0] == null ? "" : arguments[0].ToString();
                 DataObjectMapping dataObjectMapping = JsonSerializer.Deserialize<DataObjectMapping>(context.Value.ToString());
 
-                var dataItemExists = dataObjectMapping.DataItemMappings.Select(x => x.TargetDataItem.Name == searchString).FirstOrDefault();
+                var dataItemExists = dataObjectMapping.DataItemMappings.Where(x => x.TargetDataItem.Name == searchString).FirstOrDefault();
 
-                if (dataItemExists)
+                if (dataItemExists != null)
                 {
                     // Regular block
                     options.Template(output, context);

ClassLibrary/DataWarehouseAutomation/Sample_Templates/TemplateSampleCustomFunctions.Handlebars

@@ -25,6 +25,7 @@ Found a data item mapping from {{sourceDataItems.0.name}} to {{targetDataItem.na
 
 {{#targetDataItemExists "FIRST_NAME"}}FIRST_NAME exists{{else}}FIRST_NAME does not exist{{/targetDataItemExists}}
 {{#targetDataItemExists "NAME"}}NAME exists{{else}}NAME does not exist{{/targetDataItemExists}}
+{{#targetDataItemExists "DATE_OF_BIRTH"}}NAME exists{{else}}NAME does not exist{{/targetDataItemExists}}
 
 -- End of mapping
 {{/each}}