From fe56ee8d5250a532503c4c8efce0b8b37863194e Mon Sep 17 00:00:00 2001
From: kahokago <kagohashi@ascade.jp>
Date: Fri, 19 Jun 2026 09:32:55 +0000
Subject: [PATCH] Fixed bug in creating ro-crate without additional metadata
 files.

---
 addons/weko/schema/ro_crate.py   | 15 +++++++--------
 addons/weko/tests/test_schema.py |  4 ++++
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/addons/weko/schema/ro_crate.py b/addons/weko/schema/ro_crate.py
index 079c52726e8..02e23cdd2d7 100644
--- a/addons/weko/schema/ro_crate.py
+++ b/addons/weko/schema/ro_crate.py
@@ -538,14 +538,13 @@ def _build_hierarchical_object(user, target_index, file_metadata, download_file_
                 if 'choose-additional-metadata' in value:
                     url = value['choose-additional-metadata']
                     value_data = json.loads(url.get('value') or '[]')
-                    if not value_data:
-                        continue
-                    file_path = value_data[0]['path']
-                    file_name = file_path.split('/')[-1]
-                    for item in value_data:
-                        item['path'] = item['path'].replace('osfstorage/', '')
-                    url['value'] = file_name
-                    value['choose-additional-metadata'] = url
+                    if value_data:
+                        file_path = value_data[0]['path']
+                        file_name = file_path.split('/')[-1]
+                        for item in value_data:
+                            item['path'] = item['path'].replace('osfstorage/', '')
+                        url['value'] = file_name
+                        value['choose-additional-metadata'] = url
                 if 'absolute_url' in value:
                     url = value['absolute_url']
                     parsed_url = urlparse(url)
diff --git a/addons/weko/tests/test_schema.py b/addons/weko/tests/test_schema.py
index 3f8ae9c72cb..04e127bf9ed 100644
--- a/addons/weko/tests/test_schema.py
+++ b/addons/weko/tests/test_schema.py
@@ -2381,6 +2381,9 @@ def test_write_ro_crate_json_mebyo_empty_files(self):
             'grdm-files': {
                 'value': [],  # No files
             },
+            'choose-additional-metadata': {  # No additional metadata files
+                'value': '',
+            },
         }
 
         schema.write_ro_crate_json(
@@ -2410,6 +2413,7 @@ def test_write_ro_crate_json_mebyo_empty_files(self):
         # Project metadata should be reflected
         assert_equal(root['name'], 'Test Dataset')
         assert_equal(root['description'], 'Description of experiment purpose')
+        assert_in('ams:purposeOfExperiment', root)
 
     def test_write_ro_crate_json_mebyo_with_additional_metadata_files(self):
         """Test MEBYO schema with choose-additional-metadata containing files.