From de6147ecfa6b5da176bb6eeb20aa6f808583b4ad Mon Sep 17 00:00:00 2001
From: Mouse Reeve <mousereeve@riseup.net>
Date: Fri, 4 Dec 2020 08:29:54 -0800
Subject: [PATCH] Ignore many to many activitypub serialization of non-lists

---
 bookwyrm/activitypub/base_activity.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/bookwyrm/activitypub/base_activity.py b/bookwyrm/activitypub/base_activity.py
index 786a2aabc..ebc026b99 100644
--- a/bookwyrm/activitypub/base_activity.py
+++ b/bookwyrm/activitypub/base_activity.py
@@ -151,8 +151,9 @@ class ActivityObject:
 
         # add many to many fields
         for (model_key, values) in many_to_many_fields.items():
-            # mention books, mention users
-            if values == MISSING:
+            # mention books, mention users, followers
+            if values == MISSING or not isinstance(values, list):
+                # user followers is a link to an orderedcollection, skip it
                 continue
             model_field = getattr(instance, model_key)
             model = model_field.model