Node input and output "bpy_prop_collection[key]" key is dropped after enabled=False in 4.0 #114389

New Issue

Rodge · 2023-11-02T06:24:51+01:00

Rodge commented

2023-11-02 06:24:51 +01:00

System Information
Operating system: Linux-6.5.9-arch2-1-x86_64-with-glibc2.38 64 Bits, X11 UI
Graphics card: NVIDIA GeForce GT 1030/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 535.113.01

Blender Version
Broken: version: 4.0.0 Beta, branch: blender-v4.0-release, commit date: 2023-11-01 18:27, hash: 0b81a163e256
Worked: version: 4.0.0 Beta, branch: blender-v4.0-release, commit date: 2023-10-23 19:29, hash: 312d8b1d6633

Short description of error
Once a node's input or output is enabled == False, then I get a 'key cannot be found 'error.
Though I can re-enable the key by using the index number of the key. [Shown in the picture]

Exact steps for others to reproduce the error
You can do this with any node; "Shader","Compositor","Geometry", etc.. Follow along by entering or pasting in the commands in the Python Console Editor.

Open blender using factory settings.
Switch over to the Scripting workspace
Go to the Python Console Editor . Copy and Paste in the commands from the next following steps inside the Python Console Editor.
Get node input name. Type in the editor and then press enter: bpy.context.object.active_material.node_tree.nodes.active.inputs[0].name
Using name as a key. Now type in the editor and then press enter.: bpy.context.object.active_material.node_tree.nodes.active.inputs['Base Color'].
Disable input. Now type in the editor and then press enter: bpy.context.object.active_material.node_tree.nodes.active.inputs['Base Color'].enabled=False
Disabling input will now throw a key not found error. Type this: bpy.context.object.active_material.node_tree.nodes.active.inputs['Base Color']
However, name 'Base Color' is still referenced. Now type this: bpy.context.object.active_material.node_tree.nodes.active.inputs[0].name
Re-enable input. Type in and Enter: bpy.context.object.active_material.node_tree.nodes.active.inputs[0].enabled=True
By re-enabling input, error is gone. bpy.context.object.active_material.node_tree.nodes.active.inputs['Base Color']

**System Information** Operating system: Linux-6.5.9-arch2-1-x86_64-with-glibc2.38 64 Bits, X11 UI Graphics card: NVIDIA GeForce GT 1030/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 535.113.01 **Blender Version** Broken: version: 4.0.0 Beta, branch: blender-v4.0-release, commit date: 2023-11-01 18:27, hash: `0b81a163e256` Worked: version: 4.0.0 Beta, branch: blender-v4.0-release, commit date: 2023-10-23 19:29, hash: `312d8b1d6633` **Short description of error** Once a node's input or output is enabled == False, then I get a 'key cannot be found 'error. Though I can re-enable the key by using the index number of the key. [Shown in the picture] ![image](/attachments/bd9fa894-76d0-47a4-9ff5-48c0e2b14a19) **Exact steps for others to reproduce the error** You can do this with any node; "Shader","Compositor","Geometry", etc.. Follow along by entering or pasting in the commands in the **Python Console Editor**. 1. Open blender using factory settings. 2. Switch over to the **Scripting** workspace 3. Go to the **Python Console Editor** ![image](/attachments/4289173d-d2eb-4ca0-b841-90272e62ceba). Copy and Paste in the commands from the next following steps inside the **Python Console Editor**. 4. **Get node input name.** Type in the editor and then press enter: `bpy.context.object.active_material.node_tree.nodes.active.inputs[0].name` ![image](/attachments/a68d97fb-17b9-46e7-862e-d8f4d2afd1bb) 5. **Using name as a key.** Now type in the editor and then press enter.: `bpy.context.object.active_material.node_tree.nodes.active.inputs['Base Color']`. ![image](/attachments/c41b5e34-3cc2-42a2-805e-22d3dc979a71) 6. **Disable input.** Now type in the editor and then press enter: `bpy.context.object.active_material.node_tree.nodes.active.inputs['Base Color'].enabled=False` 7. **Disabling input will now throw a key not found error.** Type this: `bpy.context.object.active_material.node_tree.nodes.active.inputs['Base Color']` ![image](/attachments/a6819f1e-91c4-430c-b3c0-dfab7bcdec42) 8. **However, name 'Base Color' is still referenced.** Now type this: `bpy.context.object.active_material.node_tree.nodes.active.inputs[0].name` ![image](/attachments/6ae67968-c0db-40b8-a243-eb4744413412) 9. **Re-enable input.** Type in and Enter: `bpy.context.object.active_material.node_tree.nodes.active.inputs[0].enabled=True` 10. **By re-enabling input, error is gone.** `bpy.context.object.active_material.node_tree.nodes.active.inputs['Base Color']` ![image](/attachments/df4ba780-6a35-4c1a-855f-a8c69310d570)

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