Joi validation return only one error message

Question

I have a three field form made of a name field, email field and a textarea. I'm using Joi 4.7.0 version along with hapijs. I use the object below validate the input. I receive the data object from an ajax call. When I fill all the three fields with wrong informations I get only the message relative to the first wrong field. Like that:

"{"statusCode":400,"error":"Bad Request","message":"name is not allowed to be empty","validation":    {"source":"payload","keys":["data.name"]}}" 

---

validate: {       payload: {         data: {           name: Joi.string().min(3).max(20).required(),           email: Joi.string().email().required(),           message: Joi.string().min(3).max(1000).required()         }       } } 

For explanation let suppose to not fill the three field. I get only one message error and not the message error of the others fields. Why?

Answer 1

I'm not integrating with hapi.js, but I noticed that there is a ValidationOptions object which can be passed along. Inside that object is an abortEarly option, so this should work:

Joi.validate(request, schema, { abortEarly: false }

This can also be configured as follows:

Joi.object().options({ abortEarly: false }).keys({...}); 

Check out these type definitions for more ValidationOptions: https://github.com/DefinitelyTyped/tsd/blob/master/typings/joi/joi.d.ts

Answer 2

It happens because Joi aborts early by default.

abortEarly - when true, stops validation on the first error, otherwise returns all the errors found. Defaults to true.

*EDIT: Configuration has changed in hapi 8.0. You need to add abortEarly: false to the routes config:

var server = new Hapi.Server(); server.connection({     host: 'localhost',     port: 8000,     routes: {         validate: {             options: {                 abortEarly: false             }         }     } }); 

*See the Joi API documentation for more details.
*Also, see validation under Hapi Route options.

So Joi stops the validation on the first error:

var Hapi = require('hapi'); var Joi = require('joi');  var server = new Hapi.Server('localhost', 8000);  server.route({     method: 'GET',     path: '/{first}/{second}',     config: {         validate: {             params: {                 first: Joi.string().max(5),                 second: Joi.string().max(5)             }         }     },     handler: function (request, reply) {          reply('example');     } });  server.start();  server.inject('/invalid/invalid', function (res) {      console.log(res.result); }); 

Outputs:

{ statusCode: 400,   error: 'Bad Request',   message: 'first length must be less than or equal to 5 characters long',   validation: { source: 'params', keys: [ 'first' ] } } 

You can however configure Hapi to return all errors. For this, you need to set abortEarly to false. You can do this in server configuration:

var server = new Hapi.Server('localhost', 8000, { validation: { abortEarly: false } }); 

If you run the script now, you get:

{ statusCode: 400,   error: 'Bad Request',   message: 'first length must be less than or equal to 5 characters long. second length must be less than or equal to 5 characters long',   validation: { source: 'params', keys: [ 'first', 'second' ] } }