maxnachlinger / joi-fp

Provides a few wrappers around Joi's validate(), attempt() and assert() functions with their arguments re-ordered for easier currying / partial application

joi-fp

Provides a few wrappers around Joi's validate(), attempt() and assert() functions with their arguments re-ordered for easier currying / partial application

Installation:

npm i joi-fp

What problem does this solve?

When using functions like joi.validate(), you will almost always have values for schema and/or options before you have the value being validated. This little library re-orders the arguments of joi.validate(), joi.attempt() and joi.assert() allowing you to pass the data you have initially, well, initially :) This library also has a few versions of these functions with fixed arities to make currying and partial application easier.

Quick Example

const _ = require('lodash')
const joi = require('joi-fp')(require('joi'))

// example with currying
const validateInput = _.curry(joi.validateFp3)({
  name: joi.string().required()
})({allowUnknown: true});

validateInput({name: 'Max', color: 'blue'})
// { error: null, value: { name: 'Max', color: 'blue' } }

// example with partial application
const validateInputAgain = _.partial(joi.validateFp, {
  name: joi.string().required()
}, {allowUnknown: true});

validateInputAgain({name: 'Max', color: 'blue'}, (err, value) => {
  console.log(err, value) // null { name: 'Max', color: 'blue' }
})

Functions

// fixed arity for easy currying / partial application
validateFp2 (schema, value)
validateFp3 (schema, optionsOrValue, optionsOrCallback)
validateFp (schema, options, value, callback)

attemptFp2 (schema, value)
attemptFp (schema, message, value)

assertFp2 (schema, value)
assertFp (schema, message, value)