Plugin add_child doesn't show children in the inspector

[mm4096]

Godot Version

4.2

Question

I have a plugin that adds some needed nodes as children when creating that node. For example, creating an Area2D will add a CollisionShape2D with a RectangleShape2D as the shape. Here’s a simplified version of my code:

func on_node_added(node: Node):
	# node isn't created, just displayed on scene load
	if node.get_child_count() > 0: return
	if node is Area2D:
		var new = Node2D.new()
		node.add_child(new)
		new.owner = node

This works both when creating a new scene and when adding a node to a scene, but when the node is created in the scene, the child node doesn’t show up in the inspector.
Here’s a tree of this example:

scene_root
|
___ new_node       // no child shown here, but exists when checked with `get_children`

And here’s creating it on a new scene. Notice the added node as a child.

new_node         // (scene root)
|
____ created_child_node // shows up here

Any ideas as to why this happens, and how I can fix this?

[shatteredreality]

Could you be having this issue?

Adding a node to scene via editor plugin

Attention Topic was automatically imported from the old Question2Answer platform. Asked By SIsilicon I am making this plugin that makes a volume out of a MeshInstance and then adds the resulting nose to the mesh as child. It worked out in the end, except for one problem. The generated volume node doesn’t show up in the scene tree. How are users going to edit it if they can’t select it from the scene tree? How do you get it to appear?

[mrcdk]

The Node.owner must be the root node of that scene. You can use EditorInterface.get_edited_scene_root() to get it: new.owner = EditorInterface.get_edited_scene_root()