From c9bfcb5d834092dabe99bffe949fb3eeee0f842c Mon Sep 17 00:00:00 2001
From: TheJoeCoder <joe@radialbog9.uk>
Date: Mon, 26 Aug 2024 22:02:42 +0100
Subject: [PATCH] Fix new userbook bug

---
 api_koreader/models.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/api_koreader/models.py b/api_koreader/models.py
index e51a94c..5c7dabb 100644
--- a/api_koreader/models.py
+++ b/api_koreader/models.py
@@ -5,7 +5,6 @@ from django.db import models
 from django.db.models import QuerySet
 from django.db.models.signals import post_save
 from django.dispatch import receiver
-from django.utils import timezone
 
 from accounts.models import User
 from reader.models import Book, UserBook
@@ -48,7 +47,7 @@ def post_save_document(sender, instance: SyncDocumentEntry, **kwargs):
 @receiver(post_save, sender=UserBook)
 def post_save_userbook(sender, instance: UserBook, **kwargs):
     # Stop recursion
-    if instance.last_progress_device.startswith("KoReader"):
+    if instance.last_progress_device is not None and instance.last_progress_device.startswith("KoReader"):
         return
     # Find the corresponding SyncDocumentEntry
     sync_doc_q: QuerySet[SyncDocumentEntry] = SyncDocumentEntry.objects.filter(user=instance.user, key__iexact=instance.book.partial_md5)
-- 
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