Feature: memoize result of asynchronous schema #923
Description
Preface - valibot is awesome
Thank you all for developing this library.
It is the most type-safe library, I have ever used.
It comes with great DX & the docs become better and better.
Use Case
Forms:
- Sometimes we need to validate certain fields asynchronously.
- It would be nice if the schema could cache certain inputs and the results of the asynchronous validations to not trigger asynchronous operations if not needed.
New action memoize
Wouldn't it be nice if we could memoize the executions inside a schema, where it is needed?
We could provide a synchronous and an asynchronous version...
memoize
memoizeAsyncExample
v.pipeAsync(
v.string(),
v.memoizeAsync(
v.customAsync(input => fetch(`/api/email/${input}`).then(() => /* ... */)), {
buffer: 10, // default 1 - tells how many inputs with their respective result are cached
itemExpiryInMs: 30_000 // default 5_000
})
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fabian-hiller commentedon Nov 13, 2024
Great idea! What is
bufferdoing? We could work onmemoizewhile also working on adebouncefunction.GregOnNet commentedon Nov 13, 2024
Oh, yeah
buffer… I thought it would be handy to be able to tell how many items are cached...Example:
gregor@domain.dewhich triggers an API call from the async validatorgregor@domain.ukwhich is calling the API againgregor@domain.dewhich is not calling the API because the outcome of the validation is still cached and not outdated.I hope clarifies the use-case a bit better.
I also like the idea of having
debouncefor certain values. 💪🏻GregOnNet commentedon Nov 14, 2024
After writing the example above, I started thinking if we are talking about
cache & cacheAsyncinstead of Memoization…fabian-hiller commentedon Nov 15, 2024
I posted this issue on X to get more feedback and ideas from other users. I am currently focusing on Valibot v1 and Standard Schema and think I will work on this issue after our stable v1 is out.
dosubot commentedon Aug 6, 2025
Hi, @GregOnNet. I'm Dosu, and I'm helping the Valibot team manage their backlog and am marking this issue as stale.
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Thanks for your understanding and contribution!
GregOnNet commentedon Aug 8, 2025
Hi,
it might be relevant especially for form validation with async validations.
But Fabian is also working on formish, that might solve this use-case.
So maybe double check with Fabian.
It is fine to close it unless there is a bigger need.