CLDC-4177: Changes logic used to decide which fields to export

app/services/exports/sales_log_export_service.rb

@@ -150,9 +150,19 @@ module Exports
       attribute_hash
     end
 
-    def is_omitted_field?(field_name, _sales_log)
-      !EXPORT_FIELDS.include?(field_name) ||
-        (!_sales_log.form.start_year_2026_or_later? && POST_2026_EXPORT_FIELDS.include?(field_name))
+    def is_included_field?(field_name, included_fields)
+      included_fields.include?(field_name)
+    end
+
+    def get_included_fields(sales_log)
+      included_fields = Set[]
+      included_fields.merge(EXPORT_FIELDS)
+
+      if sales_log.form.start_year_2026_or_later?
+        included_fields.merge(POST_2026_EXPORT_FIELDS)
+      end
+
+      return included_fields
     end
 
     def build_export_xml(sales_logs)
@@ -162,11 +172,12 @@ module Exports
         attribute_hash = apply_cds_transformation(sales_log, EXPORT_MODE[:xml])
         form = doc.create_element("form")
         doc.at("forms") << form
+        included_fields = get_included_fields(sales_log)
         attribute_hash.each do |key, value|
-          if is_omitted_field?(key, sales_log)
-            next
-          else
+          if is_included_field?(key, included_fields)
             form << doc.create_element(key, value)
+          else
+            next
           end
         end
       end