Joi validation return only one error message
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
It happens because Joi aborts early by default.
abortEarly
- whentrue
, stops validation on the first error, otherwise returns all the errors found. Defaults totrue
.
*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' ] } }