Test for the Accept activity on Follow objects. If true, return the Accept activity from to_base.

federation/entities/activitypub/models.py

@@ -1104,10 +1104,13 @@ class Follow(Activity, base.Follow):
         return super().to_as2()
 
     def to_base(self):
-        # This is assuming Follow can only be the object of an Undo activity. Lazy.
-        if self.activity != self: 
+        if isinstance(self.activity, Undo):
             self.following = False
 
+        # Socialhome doesn't know what to do with Accept objects yet.
+        if isinstance(self.activity, Accept):
+            return self.activity
+
         return self
 
     def post_receive(self) -> None:
@@ -1252,6 +1255,9 @@ class Like(Activity, base.Reaction):
 
 # inbound Accept is a noop...
 class Accept(Create, base.Accept):
+    def validate(self):
+        pass
+
     class Meta:
         rdf_type = as2.Accept
         exclude = ('created_at',)