8 replies

Understanding Transforms in Zod: Converting from Schema A to Schema B

Coming from using zod, I'm not sure if I'm understanding how to do to transforms properly. If I have 2 schemas like

const schemaA = S.string.pipe(S.length(20));
const schemaB = S.string.pipe(S.length(10));

const schemaA = S.string.pipe(S.length(20));
const schemaB = S.string.pipe(S.length(10));

const schemaA = S.string.pipe(S.length(20));
const schemaB = S.string.pipe(S.length(10));

const schemaA = S.string.pipe(S.length(20));
const schemaB = S.string.pipe(S.length(10));

how do I create a transform to go from A to B? I've read about

.transform

.transform

.transform

.transform but not sure how to encode it back for this. If I'm never going to encode can I just do something like

S.transform(
  schemaA,
  schemaB,
  (value) => value.slice(10),
  (_) => _,
);

S.transform(
  schemaA,
  schemaB,
  (value) => value.slice(10),
  (_) => _,
);

S.transform(
  schemaA,
  schemaB,
  (value) => value.slice(10),
  (_) => _,
);

S.transform(
  schemaA,
  schemaB,
  (value) => value.slice(10),
  (_) => _,
);