fixes

[wolnelektury.git] / src / bookmarks / models.py

diff --git a/src/bookmarks/models.py b/src/bookmarks/models.py
index 7325e2d..098a8b0 100644 (file)
--- a/src/bookmarks/models.py
+++ b/src/bookmarks/models.py
@@ -40,7 +40,7 @@ class Bookmark(Syncable, models.Model):
             self.audio_timestamp = self.book.sync_elid(self.anchor)
         if self.audio_timestamp:
             self.mode = 'audio'
-            self.anchor = self.book.sync_ts(self.audio_timestamp)
+            self.anchor = self.book.sync_ts(self.audio_timestamp) or ''
         return super().save(*args, **kwargs)
 
     @classmethod