arktype•2mo ago

Latest "keys:distilled" equivalent?

Hello, I started using ArkType a back in v1 and it has obviously come on leaps and bounds since then which is great to see. However, back in v1 you could do something like

export const loginPayload = type(
  {
    email: 'email',
    password: '1<string<999',
  },
  { keys: 'distilled' }
);

export const loginPayload = type(
  {
    email: 'email',
    password: '1<string<999',
  },
  { keys: 'distilled' }
);

and once you validated a payload against this you would only ever get an object with email/password keys. I'm wondering how to achieve a similar result with the latest version of the library. Thanks.

7 Replies

ssalbdivad•2mo ago

Two ways to do this:

const t = type({
    a: "string"
}).onUndeclaredKey("delete")

const o = type({ "+": "delete", a: "string[]" })

const t = type({
    a: "string"
}).onUndeclaredKey("delete")

const o = type({ "+": "delete", a: "string[]" })

The second is slightly more optimal perf-wise since it doesn't require creating two types. Sorry, working on new docs for this now!

dibbo•2mo ago

No problem at all, thank you for the (impressively fast) response! 👍

aabad_ankit•3w ago

@ArkDavid If I add onUndeclaredKey("delete"), I can't further use this type to construct more types const t = type({ a: "string" }).onUndeclaredKey("delete") const t2 = t.and({b:"string"})

Dimava•3w ago

@aabad_ankit use ```ts code ``` for code There is .merge

import { type } from 'arktype'

const t = type({
    a: "string",
    '+': 'delete'
})
const t2 = t.merge({b:"string"})

console.log(t2({a:'1', b: '2', c: '3'}))

import { type } from 'arktype'

const t = type({
    a: "string",
    '+': 'delete'
})
const t2 = t.merge({b:"string"})

console.log(t2({a:'1', b: '2', c: '3'}))

aabad_ankit•3w ago

Great, any reason why and doesn't work but merge works.

ssalbdivad•3w ago

Yes, because and means "satisfies both of these types". But if you add new keys to a type with onUndeclaredKey: delete, you haven't satisfied the original type, which would have deleted that key Merge means "combine the property declarations of each of these types, giving priority to the right side", so it's fine Kind of like how you can override previously declared props with ... when you're merging objects

aabad_ankit•3w ago

Got it. Thank you

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Latest "keys:distilled" equivalent?