のproperty同士の関係の検証をできるやつ

第2引数はエラーが出た際に紐づけるpropertyを指定する

は、全部のpropertyに値が入っていないと発火しない

const RegisterSchema = v.pipe(
  v.object({
    email: v.pipe(
      v.string(),
      v.nonEmpty('Please enter your email.'),
      v.email('The email address is badly formatted.')
    ),
    password1: v.pipe(
      v.string(),
      v.nonEmpty('Please enter your password.'),
      v.minLength(8, 'Your password must have 8 characters or more.')
    ),
    password2: v.string(),
  }),
  v.forward(
    v.partialCheck(
      [['password1'], ['password2']],
      (input) => input.password1 === input.password2,
      'The two passwords do not match.'
    ),
    ['password2']
  )
);

const CalculationSchema = v.pipe(
  v.object({
    a: v.number(),
    b: v.number(),
    sum: v.number(),
  }),
  v.forward(
    v.check(({ a, b, sum }) => a + b === sum, '計算が正しくありません。'),
    ['sum']
  )
);