Joi: Global language settings

[mgartner]

When using in conjunction with Hapi, is there anyway to override the language settings on a global level. I know I can set language options on each field validated, but that is tedious if I wanted to change the language for all fields everywhere in my app.

I know that somewhere Hapi is calling Joi.validate() which allows a language option to be passed in, is there anyway to configure that?

[Marsup]

Yup, just put that in a file and use it as your joi base :

var Joi = require('joi');
module.exports = Joi.options({ language: { ... } })

var Joi = require('./myOwnJoi');
var schema  = Joi.object()...

[Marsup]

You can probably also set it in the server options, see routes parameter. Routes accept a validate.options, so something like { connections: { routes: { validate: { options: { language: {...}}}}}} should do. (not tested)

[EdsonBueno]

Apparently the first approach doesn't work anymore. The object returned by the Joi.options() doesn't have any object() or string() functions for example, so, we can't do module.exports = Joi.options({ language: { ... } }), otherwise, we get a TypeError: Joi.options(...).object is not a function

[Marsup]

Yup I was wrong, it would never have worked. Last answer should work though.

[EdsonBueno]

But last answer doesn't work with Joi standalone. Any other alternatives?

[mytharcher]

Same as @EdsonBueno still have question on how to apply my own language options to global standalone joi object? Any approach or workaround for today?

[Marsup]

It can now be done with https://github.com/hapijs/joi/blob/master/API.md#defaultsfn, applying the same language to any type of schema.

[yash2code]

It can now be done with https://github.com/hapijs/joi/blob/master/API.md#defaultsfn, applying the same language to any type of schema.

how ?

[subuta]

It can now be done with https://github.com/hapijs/joi/blob/master/API.md#defaultsfn, applying the same language to any type of schema.

I've done it following way :)

// SEE language.js for message structure.
// https://github.com/hapijs/joi/blob/master/lib/language.js
const ja = require('./locales/ja') // Use "Japanese" locale in my case.
const assert = require('assert')

// `error.message` should be original one.
assert.strictEqual(Joi.validate('boom', Joi.string().email()).error.message, '"value" must be a valid email')

// Inject localized error messages into Joi instance.
const LocalisedJoi = Joi.defaults((schema) => {
  return schema.options({
    language: ja.errors
  })
})

// `error.message` should be localized version now!
assert.notStrictEqual(LocalisedJoi.validate('boom', LocalisedJoi.string().email()).error.message, '"value" must be a valid email')

[danlupascu]

@subuta It's funny that I also needed to override the global language and I found your comment that was posted just 26 minutes ago.

Thanks for sharing your solution.