[PRMP-1611] Sort search documents results in descending order

lambdas/services/base/dynamo_service.py

@@ -509,6 +509,7 @@ def query_table_with_paginator(
         limit: int = 20,
         page_size: int = 1,
         start_key: str | None = None,
+        scan_index_forward: bool | None = None,
     ) -> dict:
 
         try:
@@ -528,6 +529,9 @@ def query_table_with_paginator(
                 "PaginationConfig": pagination_config,
             }
 
+            if scan_index_forward is not None:
+                query_params["ScanIndexForward"] = scan_index_forward
+
             if expression_attribute_values is None:
                 expression_attribute_values = {}
 

lambdas/services/document_reference_search_service.py

@@ -281,6 +281,7 @@ def get_paginated_references_by_nhs_number(
             filter_expression=filter_expression,
             expression_attribute_names=condition_attribute_names,
             expression_attribute_values=condition_attribute_values,
+            scan_index_forward=False,
         )
 
         logger.info("Validating upload status")

lambdas/services/document_service.py

@@ -368,6 +368,7 @@ def query_table_with_paginator(
         index_name: str,
         search_key: str,
         search_condition: str,
+        scan_index_forward: bool | None = None,
         table_name: str | None = None,
         filter_expression: str | None = None,
         expression_attribute_names: dict | None = None,
@@ -393,6 +394,7 @@ def query_table_with_paginator(
                 limit=limit,
                 page_size=page_size,
                 start_key=start_key,
+                scan_index_forward=scan_index_forward,
             )
 
             references = [

lambdas/tests/unit/services/base/test_dynamo_service.py

@@ -4,6 +4,7 @@
 import pytest
 from boto3.dynamodb.conditions import And, Attr, Equals, Key
 from botocore.exceptions import ClientError
+
 from enums.dynamo_filter import AttributeOperator
 from enums.metadata_field_names import DocumentReferenceMetadataFields
 from services.base.dynamo_service import DynamoDBService
@@ -1521,6 +1522,7 @@ def test_query_table_using_paginator(mock_service):
         index_name="NhsNumberIndex",
         key="NhsNumber",
         condition=TEST_NHS_NUMBER,
+        scan_index_forward=False,
     )
 
     mock_paginator.paginate.assert_called_with(
@@ -1529,6 +1531,7 @@ def test_query_table_using_paginator(mock_service):
         KeyConditionExpression="NhsNumber=:i",
         ExpressionAttributeValues={":i": {"S": TEST_NHS_NUMBER}},
         PaginationConfig={"MaxItems": 20, "PageSize": 1},
+        ScanIndexForward=False,
     )
 
     assert actual == expected

lambdas/tests/unit/services/test_document_reference_search_service.py

@@ -526,6 +526,7 @@ def test_get_paginated_references_by_nhs_number_returns_references_and_token(
         filter_expression="#Deleted_attr = :Deleted_condition_val OR attribute_not_exists(#Deleted_attr)",
         expression_attribute_names={"#Deleted_attr": "Deleted"},
         expression_attribute_values={":Deleted_condition_val": ""},
+        scan_index_forward=False,
     )
 
     assert actual == expected
@@ -561,6 +562,7 @@ def test_get_paginated_references_by_nhs_number_handles_filters(mock_document_se
             ":Deleted_condition_val": "",
             ":DocStatus_condition_val": "final",
         },
+        scan_index_forward=False,
     )