From e2f921b7f510f12856436bec203f3d92e11e5900 Mon Sep 17 00:00:00 2001
From: Mouse Reeve <mousereeve@riseup.net>
Date: Tue, 16 Feb 2021 19:28:23 -0800
Subject: [PATCH] better checking for empty values

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

diff --git a/bookwyrm/activitypub/base_activity.py b/bookwyrm/activitypub/base_activity.py
index 7ee8ca45..933745e0 100644
--- a/bookwyrm/activitypub/base_activity.py
+++ b/bookwyrm/activitypub/base_activity.py
@@ -68,6 +68,8 @@ class ActivityObject:
         for field in fields(self):
             try:
                 value = kwargs[field.name]
+                if value in (None, MISSING):
+                    raise KeyError()
                 try:
                     is_subclass = issubclass(field.type, ActivityObject)
                 except TypeError: