saves wrong path for external asset.

[blueforesticarus]

cargo is a blueprint in another file which is correctly exported to blueprints/cargo.glb, but when I save my level it puts in the wrong path, causing a crash.

      "extras": {
        "SpawnBlueprint": "()",
        "BlueprintInfo": "(name: \"cargo\", path: \"./cargo\")"
      },
      "name": "cargo",

2025-03-22T21:56:43.211051Z  WARN blenvy::blueprints::spawn_from_blueprints: FAILED TO LOAD ./cargo
2025-03-22T21:56:43.211262Z  INFO blenvy::blueprints::spawn_from_blueprints: Step 3: all assets loaded, attempting to spawn blueprint scene BlueprintInfo { name: "cargo", path: "./cargo" } for entity Some("cargo"), id: 90v1
thread 'Compute Task Pool (7)' panicked at forks/Blenvy/crates/blenvy/src/blueprints/spawn_from_blueprints.rs:472:2025-03-22T21:56:43.211299Z ERROR bevy_asset::server: Path not found: ./cargo
13:
gltf file "./cargo" should have been loaded

[blueforesticarus]

side note: that probably should not be a panic

[blueforesticarus]

I was able to determine the issue was in the blender asset file for cargo.glb.

Looking at the blender python console, I determined that in myscene.blend the linked asset's export_path bpy.data.collections['cargo']["export_path"] did not exist, and in the cargo.blend (which defined the blueprint) export path was also missing. I knew by comparing another library asset from another file (one that exports correctly) that this should not be the case.

I tried a bunch of stuff to try to get blenvy to reset whatever was borked (clearing and remarking as asset, "generating" in 3rd blenvy window, resetting settings and reexporting the gltf). Eventually something worked (specifically I think it was reexporting, change detection might have tripped me up).

Then I had to remove the asset from myscene.blend, refresh the asset library, and readd the asset. After that I confirmed export_path existed there as well. The export from myscene is setting the path correctly and the blueprint is loaded in correctly.

[blueforesticarus]

saved /home/user/files/projects/dev/games/CornGame/art/untitled.blend
prepare and export
serializing project
scene Scene
Error in bpy.app.handlers.save_post[1]:
Traceback (most recent call last):
  File "/home/user/.config/blender/4.3/extensions/user_default/Blenvy/__init__.py", line 145, in post_save
    bpy.context.window_manager.auto_export_tracker.save_handler( scene, depsgraph)
  File "/home/user/.config/blender/4.3/extensions/user_default/Blenvy/add_ons/auto_export/common/tracker.py", line 69, in save_handler
    prepare_and_export()
  File "/home/user/.config/blender/4.3/extensions/user_default/Blenvy/add_ons/auto_export/common/prepare_and_export.py", line 22, in prepare_and_export
    per_scene_changes, per_collection_changes, per_material_changes, project_hash = get_changes_per_scene(settings=blenvy)
                                                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/.config/blender/4.3/extensions/user_default/Blenvy/add_ons/auto_export/common/project_diff.py", line 42, in get_changes_per_scene
    current = serialize_current(settings)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/.config/blender/4.3/extensions/user_default/Blenvy/add_ons/auto_export/common/project_diff.py", line 31, in serialize_current
    current = serialize_project(settings)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/.config/blender/4.3/extensions/user_default/Blenvy/add_ons/auto_export/common/serialize_project.py", line 362, in serialize_project
    materials = materials_hash(object, cache, settings) if len(object.material_slots) > 0 else None
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/.config/blender/4.3/extensions/user_default/Blenvy/add_ons/auto_export/common/serialize_project.py", line 299, in materials_hash
    mat = material_hash(material, cache, settings)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/.config/blender/4.3/extensions/user_default/Blenvy/add_ons/auto_export/common/serialize_project.py", line 281, in material_hash
    cached_hash = cache['materials'].get(material.name, None)
                                         ^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'name'
Info: Saved "untitled.blend"

likely related, blender crashed while exporting this file and now blenvy export fails immediately

EDIT: fixed this with a if material is None: return "NONE" in material_hash

[blueforesticarus]

I'm actually getting the missing export_path on something like half the library assets I create. And there does not seem to be any reliable way to get the fix to propagate to the file which uses the asset.