Save attachment values diff with attached file

taiga/projects/history/freeze_impl.py

@@ -203,6 +203,7 @@ def extract_attachments(obj) -> list:
         yield {"id": attach.id,
                "filename": os.path.basename(attach.attached_file.name),
                "url": attach.attached_file.url,
+               "attached_file": str(attach.attached_file),
                "thumb_url": thumb_url,
                "is_deprecated": attach.is_deprecated,
                "description": attach.description,

taiga/timeline/serializers.py

@@ -74,10 +74,11 @@ class TimelineSerializer(serializers.LightSerializer):
         return obj.data
 
     def parse_url(self, item):
+        if 'attached_file' in item:
+            attached_file = item['attached_file']
+        else:
             file_path = urlparse(item['url']).path
             index = file_path.find('/attachments')
             attached_file = file_path[index+1:]
 
         item['url'] = default_storage.url(attached_file)
-
-        return item['url']