one() & many()one() and many() are the two entry-point helpers you will use to declare
fields inside every Type-A schema. They wrap a type descriptor (t.*) and
optionally accept field-level options (defaults, constraints, etc.).
one() – declares a single value (scalar) field.many() – declares an ordered collection (Array or Set), depending
on the runtime input.import { describe, it, expect } from "vitest";
import { Schema, one, many, typed as t } from "@rybosome/type-a";
describe("one() vs many()", () => {
it("creates both scalar and collection fields", () => {
class TagList extends Schema.from({
owner: one(t.string),
tags: many(t.string),
}) {}
const list = new TagList({ owner: "ryan", tags: ["a", "b", "c"] });
expect(list.owner).toBe("ryan");
expect(list.tags.length).toBe(3);
});
});
Each call to
one()/many()returns a builder object that the schema compiler consumes at class-definition time – no decorators or runtime reflection required.