Effect-TS/effect @effect/schema@0.62.4

on GitHub

Patch Changes

• #2108 1c6d18b Thanks @gcanti! - Schema: add transformation: false option to pluck.

  Given a schema Schema<A, I, R> and a key K, this function extracts a specific field from the A type, producing a new schema that represents a transformation from the I type to A[K].

  If the option { transformation: false } is provided, the returned schema Schema<A[K], I[K], R> only represents the value of the field without any transformation.

  Example

  import * as S from "@effect/schema/Schema";
  
  // ---------------------------------------------
  // use case: pull out a single field from a
  // struct through a transformation
  // ---------------------------------------------
  
  const mytable = S.struct({
    column1: S.NumberFromString,
    column2: S.number,
  });
  
  // const pullOutColumn1: S.Schema<number, {
  //     readonly column1: string;
  //     readonly column2: number;
  // }, never>
  const pullOutColumn1 = mytable.pipe(S.pluck("column1"));
  
  console.log(
    S.decode(S.array(pullOutColumn1))([
      { column1: "1", column2: 100 },
      { column1: "2", column2: 300 },
    ]),
  );
  // Output: { _id: 'Either', _tag: 'Right', right: [ 1, 2 ] }
  
  // ---------------------------------------------
  // use case: pull out a single field from a
  // struct (no transformation)
  // ---------------------------------------------
  
  // const pullOutColumn1Value: S.Schema<number, string, never>
  const pullOutColumn1Value = mytable.pipe(
    S.pluck("column1", { transformation: false }),
  );
  
  console.log(S.decode(S.array(pullOutColumn1Value))(["1", "2"]));
  // Output: { _id: 'Either', _tag: 'Right', right: [ 1, 2 ] }

• #2110 13d3266 Thanks @gcanti! - make headOr dual

• #2111 a344b42 Thanks @gcanti! - add support for unions to keyof