Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Asynchronous validations

See original GitHub issue

There’s support for validating promise types, but I don’t see a way to create async validators.

What I’m thinking of is something like this:

const foreignKey = z.string().refine(idExistsAsync, {
  message: "ID not found",
});
foreignKey.parseAsync("1234")

Where idExistsAsync is some function that asynchronously checks some backend to make sure that the value is valid. It returns a promise. Of course this would mean that the entire schema becomes async, so there are some other concerns here when async values are used as fields on objects.

Issue Analytics

State:
Created 3 years ago
Reactions:1
Comments:6 (4 by maintainers)

Top GitHub Comments

3reactions

colinhackscommented, Sep 17, 2020

This is now available in the Zod 2 beta: https://github.com/vriad/zod/tree/v2

@chrbala @Albertbol

1reaction

Albertbolcommented, Sep 17, 2020

Thank you that’s awesome ! Will test it out

Top Results From Across the Web

Asynchronous Validation — FluentValidation documentation

By default, FluentValidation allows custom rules defined with MustAsync or CustomAsync to be run asynchronously, as well as defining asynchronous conditions ...

Asynchronous validation - Ajv JSON schema validator

Asynchronous validation. You can define formats and keywords that perform validation asynchronously by accessing database or some other service.

Using Custom Async Validators in Angular Reactive Forms

In Angular, you can do this using Async Validators. Create a basic application. We are going to create a very minimalist form that...

yiminghe/async-validator: validate form asynchronous - GitHub

If your validation involves multiple asynchronous calls (for example, database queries) and you only need the first error use this option.

Async Validation In Angular - C# Corner

Rules for Async Validator · The function must implement the AsyncValidatorFn Interface, which defines the signature of the validator function.