Do not put meta[:object_data] for local Updates

lib/pleroma/web/activity_pub/object_validator.ex

@@ -129,7 +129,8 @@ def validate(
         meta
       )
       when objtype in ~w[Question Answer Audio Video Event Article Note Page] do
-    with {:ok, object_data} <- cast_and_apply(object),
+    with {_, false} <- {:local, Access.get(meta, :local, false)},
+         {:ok, object_data} <- cast_and_apply(object),
          meta = Keyword.put(meta, :object_data, object_data |> stringify_keys),
          {:ok, update_activity} <-
            update_activity
@@ -137,6 +138,15 @@ def validate(
            |> Ecto.Changeset.apply_action(:insert) do
       update_activity = stringify_keys(update_activity)
       {:ok, update_activity, meta}
+    else
+      {:local, _} ->
+        with {:ok, object} <-
+               update_activity
+               |> UpdateValidator.cast_and_validate()
+               |> Ecto.Changeset.apply_action(:insert) do
+          object = stringify_keys(object)
+          {:ok, object, meta}
+        end
     end
   end
 

test/pleroma/web/activity_pub/object_validators/update_handling_test.exs

@@ -95,5 +95,36 @@ test "converts object into Pleroma's format" do
       assert %{"emoji" => %{"some_emoji" => "https://somewhere.org/emoji/url/1.png"}} =
                meta[:object_data]
     end
+
+    test "returns no object_data in meta for a local Update" do
+      user = insert(:user)
+      note = insert(:note, user: user)
+
+      updated_note =
+        note.data
+        |> Map.put("content", "edited content")
+
+      {:ok, update, _} = Builder.update(user, updated_note)
+
+      assert {:ok, _update, meta} = ObjectValidator.validate(update, local: true)
+      assert is_nil(meta[:object_data])
+    end
+
+    test "returns object_data in meta for a remote Update" do
+      user = insert(:user)
+      note = insert(:note, user: user)
+
+      updated_note =
+        note.data
+        |> Map.put("content", "edited content")
+
+      {:ok, update, _} = Builder.update(user, updated_note)
+
+      assert {:ok, _update, meta} = ObjectValidator.validate(update, local: false)
+      assert meta[:object_data]
+
+      assert {:ok, _update, meta} = ObjectValidator.validate(update, [])
+      assert meta[:object_data]
+    end
   end
 end