Fix/camera selection

[vincentullmann]

Changelog Description

fix an issue where updating cameras could cause other nodes to be copied or fail if the depending on the current seleciton

Additional review information

alternative solution: We remove the copy/paste workaround.
I'm not sure what exactly the workaround is for, so I cannot comment on it

Testing notes 1):

1. import a camera
2. select the camera node
3. open the "AYON Scene Inventory"
4. change the version
5. observe a A PythonObject is not attached to a node. exeption

Version update to 'v008' failed with the following error:
A PythonObject is not attached to a node.

Explanation:

the maintained_selection context stores a list of selected nodes, including the camera node that is being updated
lines 164-167 cuts and pastes the node invalidating the python object referenced in the context manager

ayon-nuke/client/ayon_nuke/plugins/load/load_camera.py

Lines 164 to 167 in fb4ee9b

	nuke.nodeCopy("%clipboard%")
	camera_name = camera_node.name()
	nuke.delete(camera_node)
	nuke.nodePaste("%clipboard%")

How this PR fixes it:

• we exclude the camera from the maintained_selection https://github.com/straylondon/ayon-nuke/blob/8939f315289acdebe39a9cba50ca01f5eb4bf503/client/ayon_nuke/plugins/load/load_camera.py#L153-L155
• and manually track its "selected" state https://github.com/straylondon/ayon-nuke/blob/8939f315289acdebe39a9cba50ca01f5eb4bf503/client/ayon_nuke/plugins/load/load_camera.py#L150 https://github.com/straylondon/ayon-nuke/blob/8939f315289acdebe39a9cba50ca01f5eb4bf503/client/ayon_nuke/plugins/load/load_camera.py#L186

Testing notes 2):

1. import a camera
2. select any other nodes
3. open the "AYON Scene Inventory"
4. change the version
5. the other nodes will be copy/pasted

Peek.2026-07-10.10-53.mp4

Explanation:

• line 151 adds the camera to the selection, but does not deselect anything

  ayon-nuke/client/ayon_nuke/plugins/load/load_camera.py

  Line 151 in fb4ee9b

  camera_node['selected'].setValue(True)

• again, lines 164-167: nuke.nodeCopy("%clipboard%") copies whatever is currently selected

How this PR fixes it:

using node.selectOnly() to ensure the camera is the only object getting copied
https://github.com/straylondon/ayon-nuke/blob/8939f315289acdebe39a9cba50ca01f5eb4bf503/client/ayon_nuke/plugins/load/load_camera.py#L168

[vincentullmann]

this is technically unrelated, but my ide kept shouting at me that camera_node could be None

[vincentullmann]

also not directly related to the issue, but given that we're using .selectOnly() earlier, we now know for sure that the return value of nuke.nodePaste will be that exact node.

So I figured that using the return value would be cleaner than looking it up via the name

[BigRoy]

alternative solution: We remove the copy/paste workaround.
I'm not sure what exactly the workaround is for, so I cannot comment on it

@jakubjezek001 @moonyuet any chance you may know?

Can we have maintained_selection silently ignore the objects that turned invalid instead without having to explicitly exclude them. I suppose we could just debug log then which I'd prefer honestly.

[vincentullmann]

made a PR for an alternative option, which would be to remove the copy/paste workaround
#330

[vincentullmann]

Can we have maintained_selection silently ignore the objects that turned invalid instead without having to explicitly exclude them. I suppose we could just debug log then which I'd prefer honestly.

@BigRoy
yes, could do that too #331
I'd still keep this (or the alternative pr) due to the second bug described in "Testing notes 2"