Why

Validation logic become simpler when it's possible to expect "typed" datas, but datas parsed from url like req.query or req.params are strings.

Install

npm i @ezy/coerce-middleware

Usage

Common

import { coerce } from '@ezy/coerce-middleware';
import express from 'express';
const app = express();

app.use(coerce('query'));

app.get('/', (req, res) => {
  res.send(JSON.stringify(req.query));
});

app.listen(3000);

// GET /?id=30&is_admin=true&name=awesome%20title
// => {
//   name: 'awesome title',
//   id: 30,
//   is_admin: true
// }

use a custom coercePrimitive function

import { coerce } from '@ezy/coerce-middleware';
import express from 'express';
const app = express();

app.use(coerce('query', value => '(^^)'));

app.get('/', (req, res) => {
  res.send(JSON.stringify(req.query));
});

app.listen(3000);

// GET /?id=30&is_admin=true&nested[name]=awesome%20title
// => {
//   nested: {
//      name: '(^^)'
//   },
//   id: '(^^)',
//   is_admin: '(^^)'
// }

Links

• API docs
• Playground