Robb
Robb
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Aarktype
Created by Robb on 4/25/2025 in #questions
No validation of field until schema is complete ?
Hello, I am an experienced developer, unfortunately not experienced in TypeScript. I am in the process of learning, so sorry if this is trivial. I am trying to set up a form for a entity whose schema varies on some type field. I think I have found a way to express this in Arktype, but the validation doesn't seem to work as intended. Here is a minimal way to reproduce: 
import { type } from "arktype"


const BaseSchema = type({
  name: "string.integer",
});

const ASchema = BaseSchema.and({
  type: "'typeA'",
  fieldA: "number",
});
const BSchema = BaseSchema.and({
  type: "'typeB'",
  configuration: "object",
});

export const Thing = ASchema.or(BSchema);

const out = Thing({
    name: "MyName",
})
import { type } from "arktype"


const BaseSchema = type({
  name: "string.integer",
});

const ASchema = BaseSchema.and({
  type: "'typeA'",
  fieldA: "number",
});
const BSchema = BaseSchema.and({
  type: "'typeB'",
  configuration: "object",
});

export const Thing = ASchema.or(BSchema);

const out = Thing({
    name: "MyName",
})
The errors only show the fact that type is wrong, but won't tell a thing about the name being incorrect. Is this the wrong way to have discriminated unions ?
3 replies