Merge branch 'question-validator' into 'develop'

QuestionValidator: Drop likes if it is not a list

Closes #3334

See merge request pleroma/pleroma!4284

changelog.d/question-validator.fix

@@ -0,0 +1 @@
+Polls could fail to refresh due to an incorrect data validation constraint.

lib/pleroma/web/activity_pub/object_validators/question_validator.ex

@@ -59,6 +59,13 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.QuestionValidator do
     end
   end
 
+  defp fix_likes(data) do
+    cond do
+      is_list(data["likes"]) -> data
+      true -> Map.drop(data, ["likes"])
+    end
+  end
+
   defp fix(data) do
     data
     |> CommonFixes.fix_actor()
@@ -67,6 +74,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.QuestionValidator do
     |> CommonFixes.fix_likes()
     |> Transmogrifier.fix_emoji()
     |> fix_closed()
+    |> fix_likes()
   end
 
   def changeset(struct, data) do