Joi - is it possible to reference multiple values?

Question

Struggling to find anything about this in the docs - is it possible to reference multiple values?

Say I have a schema that takes 3 numbers (a, b, c), is it possible to set a max property on c based on a and b. Something like the following:

joi.object().keys({
  a: joi.number(),
  b: joi.number(),
  c: joi.number().max(joi.ref('a') + joi.ref('b'))
})

Does this answer your question? [Does Javascript pass by reference?](https://stackoverflow.com/questions/13104494/does-javascript-pass-by-reference) — tbhaxor, Apr 15 '20 at 18:47
https://medium.com/nodesimplified/javascript-pass-by-value-and-pass-by-reference-in-javascript-fcf10305aa9c — tbhaxor, Apr 15 '20 at 18:47
@tbhaxor no... I am looking for answers for joi, the validation library — JmJ, Apr 15 '20 at 18:49

Mohammad Ali Rony · Accepted Answer · 2020-04-15T21:08:34.043

0

For reference, multiple values use expression like

const schema = joi.object().keys({
  a: joi.number(),
  b: joi.number(),
  c: joi.expression("{{a +b}}"),
});
console.log(schema.validate({ a: 400, b: 300, c: 700 }));

edited Apr 15 '20 at 21:08

answered Apr 15 '20 at 20:14

Mohammad Ali Rony

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Joi - is it possible to reference multiple values?

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