JTD schemas do not support coerceTypes option

[riker09]

I'm using TypeScript v4.3.4 and I am unable to use the coerceTypes option when constructing the Ajv instance.

import Ajv from 'ajv/dist/jtd';

const ajv = new Ajv({ coerceTypes: true });

This is a screenshot of the error I get in VSCodium v1.57.1:

[epoberezkin]

JTD schemas do not support type coercion.

[egorkel-altexsoft]

Why?

[curvedriver]

@epoberezkin,
Do you have any plans to support the coerceTypes option or is this not possible in case of JTD?

[fabianeichinger]

Ran into the same issue today. Really happy with JTD type generation, but working against an inconsistent API makes coercion kind of a hassle.

I wrote a small helper to wrap Ajv validator and do simple coercion. It's not extensively tested, but I'll update it if I run into bugs until this is an official feature: https://gist.github.com/fabianeichinger/f9bad3ee17d637ac3778448d0fb0f528