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))

Author

Julian Claus and contributors.

License

MIT