Added a fallback case for pointers without ["uuid"]

[andrewcrom]

In Blender 4.5 with a particular Geometry node group, I was running into issues in attributes.py:41

def _get_pointer(element: Any) -> str:

line 41, in _get_pointer
    return element["uuid"] if element else None
           ~~~~~~~^^^^^^^^
KeyError: 'bpy_struct[key]: key "uuid" not found'

The fix is to also check for element.get("uuid") which fixes the the issue.

Orginal:

def _get_pointer(element: Any) -> str:
    return element["uuid"] if element else None

Fix:

def _get_pointer(element: Any) -> str:
    if not element:
        return None
    try:
        return element.get("uuid")
    except AttributeError:
        try:
            return element["uuid"]
        except (KeyError, TypeError):
            return None

[j10er]

Hm, this is weird, then another problem probably must have occurred when preprocessing the node trees. Before exporting, all node trees should receive a uuid if they don't yet have one

[Copilot]

Pull Request Overview

This PR fixes a KeyError issue in the _get_pointer function when elements don't have a "uuid" key. The function was previously using direct dictionary access which caused exceptions in Blender 4.5 with certain Geometry node groups.

Key changes:

• Replaced direct dictionary access with try-catch fallback logic
• Added proper error handling for both .get() method and dictionary access patterns

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[Copilot]

The logic flow is unnecessarily complex. Consider checking if the element has dictionary-like behavior first, then use .get() with a default value. This would be more readable: return getattr(element, 'get', lambda k, default=None: element.get(k, default) if hasattr(element, 'get') else element.get(k) if k in element else default)('uuid') or simply use a more straightforward approach with hasattr checks.

Suggested change

	try:
	return element.get("uuid")
	except AttributeError:
	try:
	return element["uuid"]
	except (KeyError, TypeError):
	return None
	if hasattr(element, "get"):
	return element.get("uuid", None)
	elif isinstance(element, dict) and "uuid" in element:
	return element["uuid"]
	elif hasattr(element, "__getitem__") and "uuid" in element:
	try:
	return element["uuid"]
	except Exception:
	return None
	return None

[Copilot]

Using element.get("uuid") without a default value returns None when the key doesn't exist, but this could mask the case where the uuid value itself is intentionally None. Consider using element.get("uuid", None) explicitly or handle the distinction between missing keys and None values.

Suggested change

	return element.get("uuid")
	return element.get("uuid", None)