Custom Properties for ShaderNodeTree do not save in blend files #82384

New Issue

Jeducious · 2020-11-03T23:00:09+01:00

Jeducious commented

2020-11-03 23:00:09 +01:00

System Information
system-info.txt

Operating system: MacOS Catalina 10.15.7 (19H2)
Graphics card: Intel Iris Graphics 6100 1536 MB graphics

Blender Version
Broken: 2.91.0, b0f34eee30, master, 2020-10-21
Worked: not sure

Short description of error
The Blender manual describes that Blender can save custom properties to its data blocks (see link). However upon attempting to save a custom property to a ShaderNodeTree type, particularly to the C.scene.world.node_treee, it is clear that the custom property is not saved to the blend file. Other data blocks appear to work just fine.

Exact steps for others to reproduce the error

Create a custom property on the C.scene.world.node_tree or on a material's node_tree;

import bpy
from bpy.props import StringProperty

bpy.types.ShaderNodeTree.uuid= StringProperty(
                    name="Unique Id for hashing",
                    default='')

bpy.context.scene.world.node_tree.uuid = 'hamburgers with cheese'

Save the blend file, close blender
Open the file in blender and inspect the bpy.context.scene.world.node_tree to find the custom property and check its value.

The custom property no longer exists. Its not listed in the data block's keys or items so that

bpy.context.scene.world.node_tree['uuid'] raises a key error

The same approach for saving custom properties to other data blocks, like materials or objects, works as expected.

**System Information** [system-info.txt](https://archive.blender.org/developer/F9185902/system-info.txt) Operating system: MacOS Catalina 10.15.7 (19H2) Graphics card: Intel Iris Graphics 6100 1536 MB graphics **Blender Version** Broken: 2.91.0, b0f34eee30c4, master, 2020-10-21 Worked: not sure **Short description of error** The [Blender manual ](https://docs.blender.org/manual/en/latest/files/data_blocks.html#custom-properties) describes that Blender can save custom properties to its data blocks (see link). However upon attempting to save a custom property to a ShaderNodeTree type, particularly to the C.scene.world.node_treee, it is clear that the custom property is not saved to the blend file. Other data blocks appear to work just fine. **Exact steps for others to reproduce the error** # Create a custom property on the C.scene.world.node_tree or on a material's node_tree; ``` import bpy from bpy.props import StringProperty bpy.types.ShaderNodeTree.uuid= StringProperty( name="Unique Id for hashing", default='') bpy.context.scene.world.node_tree.uuid = 'hamburgers with cheese' ``` - Save the blend file, close blender - Open the file in blender and inspect the `bpy.context.scene.world.node_tree` to find the custom property and check its value. # The custom property no longer exists. Its not listed in the data block's keys or items so that ``` bpy.context.scene.world.node_tree['uuid'] raises a key error ``` The same approach for saving custom properties to other data blocks, like materials or objects, works as expected.

Jeducious commented

2020-11-03 23:00:09 +01:00

Added subscriber: @JamesCrowther

Robert Guetzkow commented

2020-11-04 11:03:26 +01:00

Added subscriber: @rjg

Robert Guetzkow commented

2020-11-04 11:03:26 +01:00

This comment was removed by @rjg

*This comment was removed by @rjg*

Robert Guetzkow commented

2020-11-04 11:07:00 +01:00

I retract my previous comment, you're following the approach outlined here.

I retract my previous comment, you're following the approach outlined [here](https://docs.blender.org/api/current/bpy.props.html).

Robert Guetzkow commented

2020-11-04 11:19:37 +01:00

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

Robert Guetzkow commented

2020-11-04 11:20:38 +01:00

Since ShaderNodeTree is a subclass of ID, this is supposed to work.

Since `ShaderNodeTree` is a subclass of `ID`, this is supposed to work.

blender-admin commented

2020-11-04 18:14:27 +01:00

This issue was referenced by 331614e09b

This issue was referenced by 331614e09be27335475ae1543f11b3d509c3c20a

Bastien Montagne commented

2020-11-04 18:15:15 +01:00

Added subscriber: @mont29

Bastien Montagne self-assigned this 2020-11-04 18:15:15 +01:00

Bastien Montagne commented

2020-11-04 18:15:15 +01:00

Same issue with master collections of scenes actually.

Bastien Montagne commented

2020-11-04 18:16:28 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Bastien Montagne closed this issue

2020-11-04 18:16:28 +01:00

Jeducious commented

2020-11-04 21:50:25 +01:00

Added subscriber: @lichtwerk

Jeducious commented

2020-11-04 21:50:25 +01:00

@mont29 @rjg @lichtwerk Thanks guys :) Really appreciate you guys looking into this. Willing to test this as soon as its in a daily build if that will help.

Jeducious commented

2020-11-27 06:11:47 +01:00

Weird, just checked this issue and can see its closed, but didn't get an update via e-mail, is that expected? I got the initial one about the issue being created!

Bastien Montagne commented

2020-11-27 10:00:49 +01:00

I got the mail... Yours might have ended up in spams? Got closed by the fixing commit.

Jeducious commented

2020-11-27 12:10:20 +01:00

In #82384#1062836, @mont29 wrote:
I got the mail... Yours might have ended up in spams? Got closed by the fixing commit.

Yeah maybe :) not sure, I had a look in there, nothing. never mind though, glad it got closed :)

> In #82384#1062836, @mont29 wrote: > I got the mail... Yours might have ended up in spams? Got closed by the fixing commit. Yeah maybe :) not sure, I had a look in there, nothing. never mind though, glad it got closed :)

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Custom Properties for ShaderNodeTree do not save in blend files #82384

Create a custom property on the C.scene.world.node_tree or on a material's node_tree;

The custom property no longer exists. Its not listed in the data block's keys or items so that