Ignore when trying to import non-statuses

lib/pleroma/web/activity_pub/importer.ex

@@ -49,11 +49,13 @@ def import_object(
     end
   end
 
+  def import_object(_, _, _), do: {:ok, nil}
+
   def import_activity(%{"type" => "Create", "object" => object} = _activity, %User{} = user, opts) do
     import_object(object, user, opts)
   end
 
-  def import_activity(_, _, _), do: nil
+  def import_activity(_, _, _), do: {:ok, nil}
 
   def import_one(%{"type" => type} = object, %User{} = user, opts \\ []) do
     if type in Pleroma.Constants.status_types() do

test/pleroma/web/activity_pub/importer_test.exs

@@ -108,5 +108,28 @@ test "it keeps public and unlisted posts unlisted with keep_unlisted option" do
       verify_with_visibility.("private", false)
       verify_with_visibility.("direct", false)
     end
+
+    test "ignores on non-Create" do
+      importing_user = insert(:user)
+
+      assert {:ok, nil} =
+               Importer.import_one(%{"type" => "Announce", "object" => %{}}, importing_user)
+    end
+
+    test "ignores on non-status types" do
+      importing_user = insert(:user)
+
+      assert {:ok, nil} =
+               Importer.import_one(
+                 %{"type" => "Create", "object" => %{"type" => "ChatMessage"}},
+                 importing_user
+               )
+
+      assert {:ok, nil} =
+               Importer.import_one(
+                 %{"type" => "Create", "object" => %{"type" => "Answer"}},
+                 importing_user
+               )
+    end
   end
 end