.path_resolve ValueError failure when requested property is None. #87768

New Issue

Will · 2021-04-24T00:27:54+02:00

Will commented

2021-04-24 00:27:54 +02:00

System Information
Operating system: Linux
Graphics card: Intel

Blender Version
Broken: 2.92

Short description of error

.path_resolve(path) seems to fail with a ValueError() when path refers to a valid property the value of which is None.

Exact steps for others to reproduce the error

Create a bpy_struct somewhere which has a property with a value of None, such as a Boolean or Array modifier with an unset "Object" or "Collection" property.
Try to access the property with .path_resolve().

Or run the open script in the attached .Blend file and watch the terminal output:

PathResolveNoneFailure.blend

Trying path: C.object.path_resolve('modifiers["BooleanUnset"].collection')
Actual value: None
Result from `.path_resolve`:
ValueError('Object.path_resolve("modifiers["BooleanUnset"].collection") could not be resolved')


Trying path: C.object.path_resolve('modifiers["BooleanSet"].collection')
Actual value: <bpy_struct, Collection("Collection") at 0x7fb1ad21ccc8>
Result from `.path_resolve`:
<bpy_struct, Collection("Collection") at 0x7fb1ad21ccc8>


Trying path: C.object.modifiers["BooleanUnset"].path_resolve('collection')
Actual value: None
Result from `.path_resolve`:
ValueError('BooleanModifier.path_resolve("collection") could not be resolved')


Trying path: C.object.modifiers["BooleanSet"].path_resolve('collection')
Actual value: <bpy_struct, Collection("Collection") at 0x7fb1ad21ccc8>
Result from `.path_resolve`:
<bpy_struct, Collection("Collection") at 0x7fb1ad21ccc8>

**System Information** Operating system: Linux Graphics card: Intel **Blender Version** Broken: 2.92 **Short description of error** `.path_resolve(path)` seems to fail with a `ValueError()` when `path` refers to a valid property the value of which `is None`. **Exact steps for others to reproduce the error** * Create a `bpy_struct` somewhere which has a property with a value of `None`, such as a Boolean or Array modifier with an unset "Object" or "Collection" property. * Try to access the property with `.path_resolve()`. Or run the open script in the attached .Blend file and watch the terminal output: [PathResolveNoneFailure.blend](https://archive.blender.org/developer/F10034943/PathResolveNoneFailure.blend) ``` Trying path: C.object.path_resolve('modifiers["BooleanUnset"].collection') Actual value: None Result from `.path_resolve`: ValueError('Object.path_resolve("modifiers["BooleanUnset"].collection") could not be resolved') Trying path: C.object.path_resolve('modifiers["BooleanSet"].collection') Actual value: <bpy_struct, Collection("Collection") at 0x7fb1ad21ccc8> Result from `.path_resolve`: <bpy_struct, Collection("Collection") at 0x7fb1ad21ccc8> Trying path: C.object.modifiers["BooleanUnset"].path_resolve('collection') Actual value: None Result from `.path_resolve`: ValueError('BooleanModifier.path_resolve("collection") could not be resolved') Trying path: C.object.modifiers["BooleanSet"].path_resolve('collection') Actual value: <bpy_struct, Collection("Collection") at 0x7fb1ad21ccc8> Result from `.path_resolve`: <bpy_struct, Collection("Collection") at 0x7fb1ad21ccc8> ```

Will commented

2021-04-24 00:27:54 +02:00

Added subscriber: @WCN