Express JSON Validator
This project is a simple and application forward express.js validation middleware generator that uses JSON Schemas as the source of configuration.
WHY: basically, i want the point and shoot type of development experience. plus consistency of the error messages and ease of custom integrations.
Installation & Usage
npm install express-json-validator --save
const express = require('express');
const { validate, ValidationError } = require('express-json-validator');
const schema = {
properties: {
username: { type: 'string' },
password: { type: 'string' }
},
required: [ 'username', 'password' ]
};
const app = express();
app.post('/signin', validate(schema), (req, res) => {
// HOORAY, validated data!
const { username, password } = req.body;
// do useful stuff here
});
// HOORAY consistent errors handling!
app.use((err, req, res, next) => {
if (err instanceof ValidationError) {
res.status(422).send(err.message);
} else {
next();
}
});Data Envelopes Support
If you're using rails-ish data envelopes for your params, meaning, user[username]
and user[password] instead of plain username and password. This package
allows you to specify the envelope option.
app.post('/signup', validate(schema, envelope: 'user')), (req, res) => {
const { user: {username, password} } = req.body;
User.create({username, password}).save().then(user => {
res.send(user);
});
});Copyright & License
All code in this repository is released under the terms of the ISC license.
Copyright (C) 2016 Nikolay Nemshilov
