Parse output for object contains keys with undefined value. How to skip those keys ?

[xinha-sh]

import * as v from "valibot";

const baseSchema = v.object({
  x: v.optional(v.array(v.string())),
  y: v.optional(v.array(v.string())),
 z: v.optional(v.array(v.string())),
})

const schemaA = v.object({
  key1: v.optional(baseSchema), 
  key2: v.optional(baseSchema)
})

const input = {key1:  {x: ["hello", "world"]}}
const result = v.parse(schemaA, input)

// result.output
// {key1: {x:  ["hello", "world"]}, key2: undefined}

Why do I get key2: undefined in the output ? What's the best way to ignore them.

My use case is that upon successful parsing I want to loop over array values via Object.values(catalog).map(item => objectKeys(item)).flat() which breaks with error Cannot convert undefined or null to object

This used to work as intended with zod schema.
Unless my input is const input = {key1: {x: ["hello", "world"]}, key2: undefined} the output shouldn't contain undefined.

What's valibot's way of stripping away undefined keys ?

[fabian-hiller]

Can you move this into a issue? Basically what you saying is, that you only want keys with undefined if they are provided.

[xinha-sh]

@fabian-hiller Yes.

Sure I'll move this to issue.