"Child" class attributes not mapped in Godot as metadata

[bitbrain]

Plugin version

Plugin version: 2.4
Godot Version: 3.4
Tiled version: 1.8, 1.9

(downloaded from Github

Issue description

Child object attributes not configured when importing tilemaps. For example, if I create a new class "House" and another class "Sofa" and add attributes to sofa, and I configure "Sofa" to be a child attribute of House, then the attributes of Sofa are not available in Godot.

Additionally, when currently trying to set this up, Godot will show the following errors:

 res://addons/vnen.tiled_importer/tiled_xml_to_dict.gd:291 - Invalid get index 'properties' (on base: 'int').
 res://addons/vnen.tiled_importer/tiled_map_reader.gd:1151 - Invalid get index 'y' (on base: 'Nil').
 res://addons/vnen.tiled_importer/tiled_map_reader.gd:1151 - Invalid get index 'y' (on base: 'Nil').
 res://addons/vnen.tiled_importer/tiled_map_reader.gd:1151 - Invalid get index 'y' (on base: 'Nil').

Steps to reproduce

1. Download tiled-1.9-demo-project.zip
2. Try to import the .tmx file with Godot

Expected behaviour: child objects with attributes are accessible in Godot
Current behaviour: child objects with attributes get ignored in Godot

Potential solution

Given a custom class with object references and other attributes that is used as a field within another class, when parsing the object in the world, create a child node of type Node and add it to the current Godot node object. Then, configure the attributes on that child Node as metadata. Repeat this process recursively.