JSONStringify

Applies JSON.stringify to any value:

import { jsonStringify } from 'dynamodb-toolbox/transformers/jsonStringify'

const jsonStringifier = jsonStringify()
const stringifiedSchema = any().transform(jsonStringifier)

prefixer.encode({ foo: 'bar' }) // => '{"foo":"bar"}'
prefixer.decode('{"foo":"bar"}') // => { foo: 'bar' }

If needed, you can provide custom space, replacer and reviver options:

import { jsonStringify } from 'dynamodb-toolbox/transformers/jsonStringify'

const priceJSONStringifier = jsonStringify({
  space: 2,
  // Save prices as cents
  replacer: (_, dollars) =>
    typeof dollars === 'number'
      ? Math.round(dollars * 100)
      : value,
  // Revive cents as dollars
  reviver: (_, cents) =>
    typeof cents === 'number' ? cents / 100 : cents
})

info

The replacer and reviver options are not serialized when building a DTO.

You can pipe a string transformer with the .pipe(...) method:

import { prefix } from 'dynamodb-toolbox/transformers/prefix'

const piped = jsonStringify().pipe(prefix('PREFIX'))
const schema = any().transform(piped)