Select Hierarchy (Child) error, when object is not on view layer #75074

New Issue

MACHIN3 · 2020-03-25T15:21:02+01:00

MACHIN3 commented

2020-03-25 15:21:02 +01:00

System Information
Operating system: Linux-4.15.0-88-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GTX 1050/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 435.21

Blender Version
Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: 375c7dc4ca

Short description of error
Select Hierarchy will throw the following error when a child object is not linked to the scene.

Traceback (most recent call last):
  File "/opt/blender 2.82a/2.82/scripts/startup/bl_operators/object.py", line 217, in execute
    obj.select_set(True)
RuntimeError: Error: Object 'child2' can't be selected because it is not in View Layer 'View Layer'!

Curiously it doesn't seem to happen when the object is unlinked from the Outliner, only when done via python. Updating the depsgraph and/or view layer seems to have no effect either.

Selecting the child via Select Grouped works fine.

video demo
select_hierarchy_child_not_in_view_layer.blend

Exact steps for others to reproduce the error

open the blend and run the script to unlink the selected child object
run the Select Hierarchy tool (in Child direction)

**System Information** Operating system: Linux-4.15.0-88-generic-x86_64-with-debian-buster-sid 64 Bits Graphics card: GeForce GTX 1050/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 435.21 **Blender Version** Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: `375c7dc4ca` **Short description of error** Select Hierarchy will throw the following error when a child object is not linked to the scene. ``` Traceback (most recent call last): File "/opt/blender 2.82a/2.82/scripts/startup/bl_operators/object.py", line 217, in execute obj.select_set(True) RuntimeError: Error: Object 'child2' can't be selected because it is not in View Layer 'View Layer'! ``` Curiously it doesn't seem to happen when the object is unlinked from the Outliner, only when done via python. Updating the depsgraph and/or view layer seems to have no effect either. Selecting the child via Select Grouped works fine. [video demo ](https://www.youtube.com/watch?v=mh18Ni3z83s) [select_hierarchy_child_not_in_view_layer.blend](https://archive.blender.org/developer/F8427822/select_hierarchy_child_not_in_view_layer.blend) **Exact steps for others to reproduce the error** * open the blend and run the script to unlink the selected child object * run the Select Hierarchy tool (in Child direction)

MACHIN3 commented

2020-03-25 15:21:02 +01:00

Added subscriber: @MACHIN3

Germano Cavalcante commented

2020-03-25 20:51:12 +01:00

Added subscribers: @ideasman42, @mano-wii

Germano Cavalcante commented

2020-03-25 20:51:12 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Germano Cavalcante commented

2020-03-25 20:51:12 +01:00

I can confirm.
The operator should check if the child is in the View Layer before trying to select.
But I haven't found a utility that does this.
Without changing the API, I think the most efficient way to resolve this would be to use a try: Exception:

The original code was added in a305a729
So ... @ideasman42?

I can confirm. The operator should check if the child is in the `View Layer` before trying to select. But I haven't found a utility that does this. Without changing the API, I think the most efficient way to resolve this would be to use a `try: Exception:` The original code was added in a305a729 So ... @ideasman42?

MACHIN3 commented

2020-03-25 21:11:45 +01:00

This is probably not the right place, but I've just noticed that unlinking from the outliner will actually remove the object for good, hence why it doesn't cause the issue with Select Hierarchy.
Is this intended behaviour? Caught me by surprise.

This is probably not the right place, but I've just noticed that unlinking from the outliner will actually remove the object for good, hence why it doesn't cause the issue with Select Hierarchy. Is this intended behaviour? Caught me by surprise.

Himanshi Kalra commented

2020-05-12 18:29:02 +02:00

Added subscriber: @Calra