map-validator

An object validator based on node-validator. Heavily inspired by express-validator.

Installation

npm install map-validator --save

Usage

var MapValidator = require('map-validator');


// our key-value data object
var postBody = {
  name: 'John Doe',
  email: '[email protected]'
  // more data here...
};

// create validator for our object
var validator = new MapValidator(postBody);

// validate object keys
validator.check('name', 'Name is required').notEmpty().isLength(5);
validator.check('email', 'Invalid email').isEmail();
validator.check('age', 'Invalid age').optional().isInt({min: 18, max: 99});

validator.sanitize('email').normalizeEmail();
validator.sanitize('age').toInt();

var errors = validator.verify();
if(errors)
	throw errors;

console.log(postBody);

Which will result:

{ name: 'John Doe', email: '[email protected]' }

API

instance.verify

function(mappedErrors)

Return all the errors or null.

The mappedErrors option can be used to return the errors as key-value map or as an array (default). On mappedErrors mode, if two or more errors occur on the same key, the first error will be chosen.

errors:

[
  {key: "email", error: "required", value: "<received input>"},
  {key: "email", error: "valid email required", value: "<received input>"},
  {key: "password", error: "6 to 20 characters required", value: "<received input>"}
]

mappedErrors:

{
  email: {
    key: "email",
    error: "required",
    value: "<received input>"
  },
  password: {
    key: "password",
    error: "6 to 20 characters required",
    value: "<received input>"
  }
}

MapValidator.extend

function(name, fn)

Used to add your own validators:

MapValidator.extend('isWhitespace', function(str) {
    return /^\s+$/.test(str);
});

MapValidator.sanitizerExtend

function(name, fn)

Used to add your own sanitizers:

MapValidator.sanitizerExtend('toLowerCase', function(str) {
    return String(str).toLowerCase();
});

License

Copyright © 2015 Moshe Simantov [email protected], MIT License