X-Git-Url: https://git.mdrn.pl/redakcja.git/blobdiff_plain/8a6efdde5fcb28fb6d82695548a3412829a3e6a2..5fa4673581da8c9ebe6ff327c4520989a6675c8c:/src/alerts/models.py

diff --git a/src/alerts/models.py b/src/alerts/models.py
index 132531fd..a262980c 100644
--- a/src/alerts/models.py
+++ b/src/alerts/models.py
@@ -39,4 +39,5 @@ class Alert(models.Model):
 
 @receiver(post_commit)
 def validate_post_commit(sender, **kwargs):
-    Alert.validate_book(sender.tree.book)
+    if hasattr(sender.tree, 'book'):
+        Alert.validate_book(sender.tree.book)