validator.js-validate

Opinionated object validation function based on validator.js.

Status

Installation

Install the package via yarn:

$ yarn add validator.js-validate

or via npm:

$ npm install validator.js-validate --save

Usage

Create validate function

This module exports a function that creates a validate function, for instance:

import createValidateFunction from 'validator.js-validate';

const validate = createValidateFunction();

The created validate function works just like validating an object, but replaces the last groups argument with an options object:

validate(data[Object], constraint[Object|Constraint], options[Object])

Options

mask (Default: true)

Returns given data masked with given constraint keys:

const data = { foo: 'bar', qux: 'qix' };
const constraint = { foo: is.equalTo('bar') };

console.log(validate(data, constraint));
// { foo: 'bar' }

console.log(validate(data, constraint, { mask: false }));
// true

throws (Default: true)

Throws a new error when validation fails. To enable this option you must pass an error class when creating the validate function as argument.

This error constructor should be prepared to receive violations as argument, for example:

import StandardError from 'standard-error';
import createValidateFunction from 'validator.js-validate';

class ValidationFailedError extends StandardError {
  constructor(errors) {
    super({ errors });
  }
}

const validate = createValidateFunction(ValidationFailedError);
const data = { foo: 'bar' };
const constraint = { foo: is.equalTo('biz') };

try {
  validate(data, constraint);
} catch (e) {
  console.log(e);
  // ValidationFailedError {
  //   errors: {
  //     foo: [{
  //       __class__: 'Violation',
  //       assert: {
  //         __class__: 'EqualTo',
  //         ...
  //       }
  //     }]
  //   }
  // }
  }
}

console.log(validate(data, constraint, { throws: false }));
// {
//   foo: [{
//     __class__: 'Violation',
//     assert: {
//       __class__: 'EqualTo',
//       ...
//     }
//   }]
// }

groups

Use this option to validate with validation groups:

const data = { foo: 'bar' };
const constraint = { foo: [is('bar').EqualTo('bar'), is('biz').equalTo('biz')] };

console.log(validate(data, constraint, { groups: 'biz' }));
// {
//   foo: [{
//     __class__: 'Violation',
//     assert: {
//       __class__: 'EqualTo',
//       ...
//     }
//   }]
// }

console.log(validate(data, constraint, { groups: 'bar' }));
// { foo: 'bar' }

Test suite

Use the test script to run the test suite:

$ yarn test

To test check coverage use the cover script:

$ yarn cover

A full coverage report will be generated on the coverage folder.

Release

$ yarn release [<version> | major | minor | patch]

License

MIT