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Utils: Spread objects in cloneSceneObjectState #967

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Utils: Spread objects in cloneSceneObjectState #967

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Utils: Spread objects in cloneSceneObjectState
kaydelaney Nov 14, 2024
72b5bea
Don't spread arrays
kaydelaney Jan 17, 2025
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2 changes: 2 additions & 0 deletions packages/scenes/src/core/sceneGraph/utils.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,8 @@ export function cloneSceneObjectState<TState extends SceneObjectState>(
for (const child of propValue) {
if (child instanceof SceneObjectBase) {
newArray.push(child.clone());
} else if (typeof child === 'object' && !Array.isArray(child)) {
newArray.push({ ...child });
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An issue just popped up around transformations that is kind of related to this PR. Basically, duplicating a panel with some transformation and then modifying the transformation options within the second panel would also modify the transformation options in the initial panel.

This happens because of the spread operator won't cover objects that contain deeper nested arrays, which is the case for transformations where you'd have an object of the form:

{
   id: "convertFieldType",
   options: {
       conversions: [{ ...some objects in array }]
   }
}

Modifying this line to use lodash cloneDeep instead of spread op fixes the issue with transformations, so maybe we can use that?

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Thanks for the info! I worry that using cloneDeep might introduce some performance issues considering how often scene objects are cloned, but I'd need to benchmark it to be sure. I'll look into it :)

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@mdvictor mdvictor Jan 21, 2025 •
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Indeed, I share your worry, thought about it myself, not sure how to deal with it tho. Some benchmarking would be great!

} else {
newArray.push(child);
}
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