Joi-intersection NPM

joi-intersection

Validate against intersections of arrays and array singletons. Provide an array of allowed groups and validate it against a single intersection of a given group. Additionally, define an array of singletons and verify the input array occurs only once.

Features

Validate groups
Validate singletons

Installation

npm install joi-intersection --save

API

`groups([[group: string]])`

A group contains array of strings.

Parameter	Type	Description
`group`	`[group: string]`	Allowed intersection groups

`singleton([singleton: string])`

Singletons contain arrays of strings.

Parameter	Type	Description
`singleton`	`[singleton: string]`	Allowed singleton

Usage

Extend Joi

You have to extend Joi first, then use it like other validation rules. You can also chain both rules.

import JoiBase from 'joi'
import JoiIntersection from 'joi-intersection'
import * as assert from 'assert'

const Joi = JoiBase.extend(JoiIntersection)

Groups

const schema = Joi.array().groups([
  ['Bob', 'Alex', 'Peter'],
  ['Jack', 'Mike']
])

Joi.validate(['Bob', 'Alex'], schema, error => assert.ok(error, null))
Joi.validate(['Bob', 'Jack'], schema, error => assert.notEqual(error, null))

Singleton

const schema = Joi.array().singleton(['Bob', 'Alex', 'Peter'])

Joi.validate(['Bob'], schema, error => assert.ok(error, null))
Joi.validate(['Bob', 'Bob'], schema, error => assert.notEqual(error, null))