Types

• String

    someField:  Joi.string()

• Unique string

    someField: Joi.string()[required]().meta({unique: true}),

• String with enums

    someField: Joi.string().valid('private', 'public','blocked'),

• Number

    someField:  Joi.number()

• Date

    someField:  Joi.date()

• Boolean

    someField:  Joi.boolean()

• Arrays

    someField:  Joi.array()

• Arrays of String

    someField:  Joi.array().items(Joi.string())

• Arrays of Reference

    someField:  Joi.array().items(Joi.string().meta({ type: 'ObjectId', ref: 'rules', displayKey: 'name' })),

• Object

    someField:  Joi.object({
       user: Joi.string().meta({ type: 'ObjectId', ref: 'users', displayKey: 'email' }),
       rules: Joi.array().items(Joi.string().meta({ type: 'ObjectId', ref: 'users', displayKey: 'name'})),
       blockAll: Joi.boolean()
       })

Allow null?

verifyExpires: Joi.date().allow(null)

Default Value?

status: Joi.string().meta({ default: 'pending'})