JOI :allow null values in array
I know what i'm posting is not what you are looking for, but as i was ran into similar type of problem.
so my problem was: I do not want to allow empty array in my object
my solution:
// if you have array of numbers
key: joi.array().items(joi.number().required()).strict().required()
// if you have array of strings
key: joi.array().items(joi.string().required()).strict().required()
If you want to allow the array to be null use:
Joi.array().items(Joi.string()).allow(null);
If you want to allow null or whitespace strings inside the array use:
Joi.array().items(Joi.string().allow(null).allow(''));
Example:
const Joi = require('joi');
var schema = Joi.array().items(Joi.string()).allow(null);
var arr = null;
var result = Joi.validate(arr, schema);
console.log(result); // {error: null}
arr = ['1', '2'];
result = Joi.validate(arr, schema);
console.log(result); // {error: null}
var insideSchema = Joi.array().items(Joi.string().allow(null).allow(''));
var insideResult = Joi.validate(['1', null, '2'], insideSchema);
console.log(insideResult);
the very short answer is:
name: Joi.string().allow(null)