I'm using Joi package for server side Validation.
I want to check if a given string is in a given list or if it is not in a given list.(define black list or white list for values)
sth like an "in" or "notIn" function. How can I do that?
var schema = Joi.object().keys({
firstname: Joi.string().in(['a','b']),
lastname : Joi.string().notIn(['c','d']),
});
You are looking for the valid and invalid functions.
v16: https://hapi.dev/module/joi/api/?v=16.1.8#anyvalidvalues---aliases-equal
v17: https://hapi.dev/module/joi/api/?v=17.1.1#anyvalidvalues---aliases-equal
As of Joi v16 valid and invalid no longer accepts arrays, they take a variable number of arguments.
Your code becomes
var schema = Joi.object().keys({
firstname: Joi.string().valid(...['a','b']),
lastname: Joi.string().invalid(...['c','d']),
});
Can also just pass in as .valid('a', 'b') if not getting the values from an array (-:
@hapi/joi then there is no @hapi/joi anymore! that package got deprecated last month & Joi is officially back to Joi. (npmjs.com/package/@hapi/joi) (Also valid and invalid do exists in @hapi/joi)- which is kind of frustrating as users has to switch from Joi to @hapi/joi last year and in a year again back to Joi :-)How about:
var schema = Joi.object().keys({
firstname: Joi.string().valid(['a','b']),
lastname : Joi.string().invalid(['c','d']),
});
There are also aliases: .allow and .only
and .disallow and .not
This works in [2023]:
var schema = Joi.object({
status: Joi.string().valid("pending", "in-review", "resolved")
});
Update from 10 Oct 2022 Now valid function requires Object
Joi.string().valid({ ...values_array }),
