Material Utilities addon not working due to API changes #93749

New Issue

Oleg · 2021-12-06T13:23:59+01:00

Oleg commented

2021-12-06 13:23:59 +01:00

System Information
Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40

Blender Version
Broken: version: 3.0.0, branch: master, commit date: 2021-12-02 18:35, hash: blender/blender@f1cca30557
Worked: (newest version of Blender that worked as expected)

Short description of error
Materials are not populated

Python: Traceback (most recent call last):
  File "D:\Programs\Blender\stable\blender-3.0.0+stable.f1cca3055776\3.0\scripts\addons\materials_utils\menus.py", line 56, in draw
    icon_value = material.preview.icon_id)
AttributeError: 'NoneType' object has no attribute 'icon_id'

location: <unknown location>:-1

Exact steps for others to reproduce the error

Enable Material Utilities addon
Press Shift+Q and select "Assign Material" or "Select by Material" - list is emty

**System Information** Operating system: Windows-10-10.0.19043-SP0 64 Bits Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40 **Blender Version** Broken: version: 3.0.0, branch: master, commit date: 2021-12-02 18:35, hash: `blender/blender@f1cca30557` Worked: (newest version of Blender that worked as expected) **Short description of error** Materials are not populated ``` Python: Traceback (most recent call last): File "D:\Programs\Blender\stable\blender-3.0.0+stable.f1cca3055776\3.0\scripts\addons\materials_utils\menus.py", line 56, in draw icon_value = material.preview.icon_id) AttributeError: 'NoneType' object has no attribute 'icon_id' location: <unknown location>:-1 ``` **Exact steps for others to reproduce the error** - Enable Material Utilities addon - Press Shift+Q and select "Assign Material" or "Select by Material" - list is emty

Oleg commented

2021-12-06 13:23:59 +01:00

Added subscriber: @DotBow

Pratik Borhade commented

2021-12-06 13:30:14 +01:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-12-06 13:44:31 +01:00

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

Polygon Clouds commented

2021-12-09 00:08:57 +01:00

Added subscriber: @zion3

Polygon Clouds commented

2021-12-09 00:08:57 +01:00

Hello, I'm creating an addon and I get a similar error in blender 3.0, as I understand the 'icon_id' is not created immediately when creating the material and that's why it can't find it, what I did is use another icon until the 'icon_id' is created which will be updated later, since I use it in a dynamic list.

I hope it helps.

Just change one line in the code:
(ms : list of materials)

before:

if ms:
        for i in range(len(ms)):
            icon = ms[i].preview.icon_id
            list.append((ms[i].name, ms[i].name, '', icon, i))
    return list

now:

if ms:
        for i in range(len(ms)):
            icon = 'NODE_MATERIAL' if not hasattr(ms[i].preview, 'icon_id') else ms[i].preview.icon_id 
            list.append((ms[i].name, ms[i].name, '', icon, i))
    return list

Hello, I'm creating an addon and I get a similar error in blender 3.0, as I understand the 'icon_id' is not created immediately when creating the material and that's why it can't find it, what I did is use another icon until the 'icon_id' is created which will be updated later, since I use it in a dynamic list. I hope it helps. Just change one line in the code: (ms : list of materials) before: ``` if ms: for i in range(len(ms)): icon = ms[i].preview.icon_id list.append((ms[i].name, ms[i].name, '', icon, i)) return list ``` now: ``` if ms: for i in range(len(ms)): icon = 'NODE_MATERIAL' if not hasattr(ms[i].preview, 'icon_id') else ms[i].preview.icon_id list.append((ms[i].name, ms[i].name, '', icon, i)) return list ```

Oleg commented

2021-12-16 08:22:11 +01:00

This comment was removed by @DotBow

*This comment was removed by @DotBow*

Polygon Clouds commented

2022-01-03 22:59:28 +01:00

Hello, for those interested, I was researching more and the best way to rearrange the code was forcing the creation of the icon_id with: preview_ensure()

now:

if ms:
    for i in range(len(ms)):
         ms[i].preview_ensure()
         icon = ms[i].preview.icon_id
         list.append((ms[i].name, ms[i].name, '', icon, i))
    return list

Hello, for those interested, I was researching more and the best way to rearrange the code was forcing the creation of the icon_id with: preview_ensure() now: ``` if ms: for i in range(len(ms)): ms[i].preview_ensure() icon = ms[i].preview.icon_id list.append((ms[i].name, ms[i].name, '', icon, i)) return list ```

Germano Cavalcante referenced this issue

2023-08-17 16:33:50 +02:00

AttributeError when opening Search Menu #104841

Nils-Carlson commented

2023-12-15 17:25:41 +01:00

To be clear, to anyone else looking to resolve this issue - this was my workaround. Go to the 'menu.py' file, and around line 57-60, ang change:

        for material_name, material in materials:
            ....

to:

        for material_name, material in materials:
            # Note: added to address
            # https://projects.blender.org/blender/blender-addons/issues/93749
            material.preview_ensure()

And the same around line 124:

                # Note: added to address
                # https://projects.blender.org/blender/blender-addons/issues/93749
                material.preview_ensure()
                
                if material.users > 0:
                    op = layout.operator(bl_id,
                                    text = material_name,
                                    icon_value = material.preview.icon_id
                                    )

Then revert / reload blender - this is just what worked for me).
Hopefully that helps!

To be clear, to anyone else looking to resolve this issue - this was my workaround. Go to the 'menu.py' file, and around line 57-60, ang change: ``` for material_name, material in materials: .... ``` to: ``` for material_name, material in materials: # Note: added to address # https://projects.blender.org/blender/blender-addons/issues/93749 material.preview_ensure() ``` And the same around line 124: ``` # Note: added to address # https://projects.blender.org/blender/blender-addons/issues/93749 material.preview_ensure() if material.users > 0: op = layout.operator(bl_id, text = material_name, icon_value = material.preview.icon_id ) ``` Then revert / reload blender - this is just what worked for me). Hopefully that helps!

Damien Picard referenced this issue from a commit

2023-12-17 14:13:35 +01:00

Fix #93749: Material Utilities addon not working due to API changes

Damien Picard closed this issue

2023-12-17 14:13:36 +01:00

Blender Bot added

and removed

labels 2023-12-17 14:13:38 +01:00