I would like my Joi middleware to keep the alphanum() validation but also allow empty spaces in both event_name and venue_name. I've checked several questions on Stack and the Joi docs without being able to get the correct answer. Here's what I have:

const Joi = require('joi');

module.exports.eventSchema = Joi.object({
    event: Joi.object({
        event_name: Joi.string().alphanum().max(50).required(),
        venue_name: Joi.string().alphanum().max(50).required(),
    }).pattern(/^\s*\w+(?:[^\w,]+\w+)*[^,\w]*$/, Joi.string())
});

Right now, the input below works just fine:

test

However, this input error's out:

test test

How do I allow for spaces in my form validation?