From 6d1bf593b94be78e15a7657a9adbd727bd59f69c Mon Sep 17 00:00:00 2001
From: Radek Czajka <rczajka@rczajka.pl>
Date: Mon, 16 Oct 2023 15:28:03 +0200
Subject: [PATCH] fix for bad documents.

---
 src/isbn/models.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/isbn/models.py b/src/isbn/models.py
index d2d62909..5c9bb449 100644
--- a/src/isbn/models.py
+++ b/src/isbn/models.py
@@ -134,7 +134,10 @@ class Isbn(models.Model):
     @classmethod
     def formats_from_document(cls, document):
         # This is a document
-        meta = document.wldocument(librarian2=True).meta
+        try:
+            meta = document.wldocument(librarian2=True).meta
+        except:
+            return []
         is_parent = len(meta.parts)
         formats = []
         for form, config in FORMS:
-- 
2.20.1