Relay error messages

Author: alexbourret

python-lib/rest_api_recipe_session.py

@@ -70,14 +70,18 @@ def retrieve_next_page(self, is_raw_output):
         page_rows = []
         logger.info("retrieve_next_page: Calling next page")
         json_response = self.client.paginated_api_call(can_raise_exeption=False)
-        metadata = self.client.get_metadata() if self.display_metadata else {DKUConstants.REPONSE_ERROR_KEY: None}
+        metadata = self.client.get_metadata() if self.display_metadata else {
+            DKUConstants.REPONSE_ERROR_KEY: json_response.get(DKUConstants.REPONSE_ERROR_KEY, None)
+        }
         is_api_returning_dict = True
         if self.extraction_key:
             data_rows = get_value_from_path(json_response, self.extraction_key.split("."), can_raise=False)
             if data_rows is None:
                 error_message = "Extraction key '{}' was not found in the incoming data".format(self.extraction_key)
                 if self.can_raise:
                     raise DataikuException(error_message)
+                elif DKUConstants.REPONSE_ERROR_KEY in metadata:
+                    return [metadata]
                 else:
                     return self.format_page_rows([{DKUConstants.REPONSE_ERROR_KEY: error_message}], is_raw_output, metadata)
             page_rows.extend(self.format_page_rows(data_rows, is_raw_output, metadata))