From 0f37e0ad42262966a01271d5adb9a5198f357ce7 Mon Sep 17 00:00:00 2001
From: Mouse Reeve <mousereeve@riseup.net>
Date: Wed, 5 Jan 2022 15:55:12 -0800
Subject: [PATCH] Don't try to clear caches for nonexistant authors

---
 bookwyrm/models/author.py | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/bookwyrm/models/author.py b/bookwyrm/models/author.py
index a4d8f9f16..5edac57d5 100644
--- a/bookwyrm/models/author.py
+++ b/bookwyrm/models/author.py
@@ -39,12 +39,12 @@ class Author(BookDataModel):
     def save(self, *args, **kwargs):
         """clear related template caches"""
         # clear template caches
-        cache_keys = [
-            make_template_fragment_key("titleby", [book])
-            for book in self.book_set.values_list("id", flat=True)
-        ]
-        cache.delete_many(cache_keys)
-
+        if self.id:
+            cache_keys = [
+                make_template_fragment_key("titleby", [book])
+                for book in self.book_set.values_list("id", flat=True)
+            ]
+            cache.delete_many(cache_keys)
         return super().save(*args, **kwargs)
 
     @property