add empty result

@@ -4,7 +4,7 @@ import requests
 from .named_enum import DocStatus
 from .models import HILDoc, AFCDoc, AFCSEOCRResult, AFCOCRResult, HILSEOCRResult, HILOCRResult
 from . import consts
-from prese.compare import pre_compare
+from prese.compare import pre_compare, get_empty_result
 
 
 class MPOSHandler:
@@ -160,7 +160,7 @@ class PreSEHandler:
         ocr_res_dict = result_class.objects.filter(application_id=application_id).values(
             *consts.PRE_COMPARE_FIELDS).first()
         if ocr_res_dict is None:
-            return
+            return get_empty_result()
 
         id_res_list = []
         for field_name in consts.CA_ADD_COMPARE_FIELDS_PRE: