koa-joi-validator

A simple validator for your awesome koa application

API

validator.Joi

The package Joi version (prefer this version over your custom version in case of breaking changes)

validator.validate(options)

A koa middleware which will validate and transform the request

param	type	required	description
options	{}	true
options.type	string	Only if you want the request body to be parsed	the coBody parser to call, can be json form or text
options.failure	int	false	The error code to throw on case of validation error, default to 400
options.options	{}	false	Options passed to Joi validator, such as allowUnknown
options.body	Joi.object	false	A joi schema validated against the request body
options.params	Joi.object	false	A joi schema validated against the request params
options.headers	Joi.object	false	A joi schema validated against the request headers
options.query	Joi.object	false	A joi schema validated against the request query

Usage

router.post('/:number/:string/:date',
  validator.validate({
    type: 'json',
    params: {
      number: validator.Joi.number().required(),
      string: validator.Joi.string().required(),
      date: validator.Joi.date().required()
    },
    body: {
      number: validator.Joi.number().required(),
      string: validator.Joi.string().required(),
      date: validator.Joi.date().required()
    },
    headers: validator.Joi.object({
      number: validator.Joi.number().required(),
      string: validator.Joi.string().required(),
      date: validator.Joi.date().required()
    }).options({ allowUnknown: true }),
    query: {
      number: validator.Joi.number().required(),
      string: validator.Joi.string().required(),
      date: validator.Joi.date().required()
    }
  }),
  function * () {
    this.assert(typeof this.params.number === 'number');
    this.assert(typeof this.params.string === 'string');
    this.assert(this.params.date instanceof Date);

    ['body', 'headers', 'query'].forEach(el => {
      this.assert(typeof this.request[el].number === 'number');
      this.assert(typeof this.request[el].string === 'string');
      this.assert(this.request[el].date instanceof Date);
    });

    this.status = 204;
  }
);