bpy.types.Object.parent_bone not reset when clearing a bone parent #88498

New Issue

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71

Blender Version
Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: 02948a2cab
Worked: (newest version of Blender that worked as expected)

Short description of error
I would expect that bpy.types.Object.parent==None implies that bpy.types.Object.parent_bone==None. This is not the case.

Exact steps for others to reproduce the error
Parent a mesh to a bone. Now .parent is set to the armature, and .parent_bone is set to the name of the bone.
Now clear the parent. This results in .parent being cleared, but .parent_bone is still the name of the previous bone parent.

Remarks
This is only relevant for the Python API and scripting. Everything in Blender and the UI probably works fine.

Unless there is a need to keep the old .parent_bone, the API would be a bit cleaner if it was reset properly. I imagine the changes required would be tiny, hopefully just one line.

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71 **Blender Version** Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: `02948a2cab` Worked: (newest version of Blender that worked as expected) **Short description of error** I would expect that `bpy.types.Object.parent==None` implies that `bpy.types.Object.parent_bone==None`. This is not the case. **Exact steps for others to reproduce the error** Parent a mesh to a bone. Now `.parent` is set to the armature, and `.parent_bone` is set to the name of the bone. Now clear the parent. This results in `.parent` being cleared, but `.parent_bone` is still the name of the previous bone parent. **Remarks** This is only relevant for the Python API and scripting. Everything in Blender and the UI probably works fine. Unless there is a need to keep the old `.parent_bone`, the API would be a bit cleaner if it was reset properly. I imagine the changes required would be tiny, hopefully just one line.

Added subscriber: @ndh

Added subscriber: @Azrael69

Added subscriber: @lichtwerk

Changed status from 'Needs Triage' to: 'Needs User Info'

Cannot reproduce, this is what I get in both 2.92 and 3.0:

>>> C.active_object.parent_bone

'Bone'

>>> C.active_object.parent = None
>>> C.active_object.parent_bone

''

Does this happen in any file?
does this happen with factory Defaults? Please try with File → Defaults → Load Factory Settings to see if you still can reproduce this issue.
If this is specific to a file, please share that here.

Cannot reproduce, this is what I get in both 2.92 and 3.0: ``` >>> C.active_object.parent_bone 'Bone' >>> C.active_object.parent = None >>> C.active_object.parent_bone '' ``` Does this happen in any file? does this happen with factory Defaults? Please try with File → Defaults → Load Factory Settings to see if you still can reproduce this issue. If this is specific to a file, please share that here.

Changed status from 'Needs User Info' to: 'Archived'

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed.

Thanks again for the report. If the problem persists please open a new report with the required information.

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed. Thanks again for the report. If the problem persists please open a new report with the required information.

@lichtwerk Sorry to keep you waiting!

Yes, it happens with the default scene. Here's the steps I did:

Create Armature
Select Cube
Shift select Armature
Pose mode
Parent Bone
Object mode
Select Cube
untitled.blend < Scene is here
Clear Parent

@lichtwerk Sorry to keep you waiting! Yes, it happens with the default scene. Here's the steps I did: Create Armature Select Cube Shift select Armature Pose mode Parent Bone Object mode Select Cube [untitled.blend](https://archive.blender.org/developer/F10157944/untitled.blend) < Scene is here Clear Parent

Changed status from 'Archived' to: 'Confirmed'

In the case of the Clear Parent operator, I can confirm.

In the case of the `Clear Parent` operator, I can confirm.

This issue was referenced by 60dbbaac42

This issue was referenced by 60dbbaac42f5a0cf35ac488df4f051f355269cc1

This issue was referenced by dc8844f8ef

This issue was referenced by dc8844f8ef6a5cfa2be1035162d39e6d83c83d7c

Changed status from 'Confirmed' to: 'Resolved'

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bpy.types.Object.parent_bone not reset when clearing a bone parent #88498