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Fix randomly selected rows #164 #231

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Fix randomly selected rows #164 #231

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13 changes: 11 additions & 2 deletions src/lib/plugins/addSubRows.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -35,8 +35,17 @@ export const addSubRows =
NewTablePropSet<never>
> =>
() => {
const getChildren: ValidChildrenFn<Item> =
children instanceof Function ? children : (item) => item[children] as unknown as Item[];
let getChildren: ValidChildrenFn<Item>;
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Given that ValidChildrenFn has an optional return value, the original intention is that getChildren should return undefined if invalid.

Furtherfore, there is a semantic difference between returning [] and undefined, so the added unknownVal.length > 0 check is an incorrect addition.

if (children instanceof Function) {
getChildren = children;
} else {
getChildren = (item) => {
const unknownVal = item[children];
return unknownVal instanceof Array && unknownVal.length > 0
? (unknownVal as unknown as Item[])
: undefined;
};
}

const deriveRows: DeriveRowsFn<Item> = (rows) => {
return derived(rows, ($rows) => {
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2 changes: 1 addition & 1 deletion src/routes/+page.svelte
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Expand Up @@ -32,7 +32,7 @@
import { getDistinct } from '../lib/utils/array.js';
import SelectIndicator from './_SelectIndicator.svelte';

const data = readable(createSamples(2, 2));
const data = readable(createSamples(5, 2));

let serverSide = false;

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4 changes: 3 additions & 1 deletion src/routes/_createSamples.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,9 @@ export const createSamples = (...lengths: number[]) => {
return [...Array(length)].map(() => {
return {
...getSample(),
...(lengths[depth + 1] !== undefined ? { children: createSamplesLevel(depth + 1) } : {}),
...(lengths[depth + 1] !== undefined && Math.random() >= 0.25
? { children: createSamplesLevel(depth + 1) }
: { children: [] }),
};
});
};
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