Validate and strip alternatives with links only.

[max-kahnt-keylight]

Context

• node version: v16.15.0
• module version with issue: 17.6.0
• last module version without issue: ?
• environment (e.g. node, browser, native): node
• used with (e.g. hapi application, another framework, standalone, ...): hapi, standalone
• any other relevant information:

What are you trying to achieve or the steps to reproduce?

Have a set of alternative schemas (all) stripped correctly when using linked subschemas only.

validateSchema1 shows the expected behavior (link-less). validateSchema3 shows the faulty behavior (links only). validateSchema2 shows a workaround behavior (fake alternative).

import * as Joi from 'joi';

export const validateA = Joi.object({
  a: Joi.any().required(),
}).id('validateA');

export const validateB = Joi.alternatives()
  .try(Joi.object({ b: Joi.string().required() }))
  .match('all')
  .id('validateB');

export const validateSchema1 = Joi.alternatives(
  validateA,
  validateB
)
  .match('all')
  .id('validateSchema1');

export const validateSchema2 = Joi.alternatives(
  Joi.object({}),
  Joi.link('#validateA'),
  Joi.link('#validateB')
)
  .match('all')
  .id('validateSchema2')
  .shared(validateA)
  .shared(validateB);

export const validateSchema3 = Joi.alternatives(
  Joi.link('#validateA'),
  Joi.link('#validateB')
)
  .match('all')
  .id('validateSchema3')
  .shared(validateA)
  .shared(validateB);

const v = {
  a: 2,
  b: 'b',
  c: 'stripMe',
};

console.log(validateSchema1.validate(v, { stripUnknown: true }));
console.log(validateSchema2.validate(v, { stripUnknown: true }));
console.log(validateSchema3.validate(v, { stripUnknown: true }));

What was the result you got?

{ value: { a: 2, b: 'b' } }
{ value: { a: 2, b: 'b' } }
{ value: { b: 'b' } }

What result did you expect?

{ value: { a: 2, b: 'b' } }
{ value: { a: 2, b: 'b' } }
{ value: { a: 2, b: 'b' } }