EXPRESS-VALIDATA - An efficient joi validator middleware

Express-validata is an efficient joi validator middleware for sanitizing inputs.

100% Free and Open Source!

What's included

• Validates any input - It can sanitize any input defined in Joi schema

• Inheritance - Supports inheritance. It's now time to write your joi schema in small re-usable component that can be inherited.

• Any input source validation - it can validate any input source (e.g req.body, req.query, req.params).

Motivation

Repeating validation logic across routes isn't a good practice. Writing validation/sanitation logic alongside your business logic is not something you want to do in this era. Won't you prefer having the ability to compose your validation logic within a middleware? That's the genesis of express-validata. The ease of perfoming your validation without repeating yourself or needing to write countless lines of code just to sanitize inputs. With express-validata, you can easily leverage on a middleware that supports validating inputs from all sources ( req.body, req.query, req.params) with ability to define and re-use joi schema across routes.

Quick Start

Install express-validata:

npm i express-validata

or use yarn

yarn add express-validata

DEPENDS ON JOI - You must install and Define your schema with Joi

const express = require('express');
const bodyParser = require('body-parser');

const joi = require('joi'); // required to define schema

const { validata } = require('express-validata'); // validation middleware

// Create Express server
const app = express();

// Express configuration
app.set('port', Number(process.env.PORT) || 8080);
app.use(bodyParser.json());

// // // || JOI SCHEMA  || \\ \\
const baseSchema = joi.object({
  limit: joi.string(),
  page: joi.string(),
});

const bodySchema = joi.object({
  firstName: joi.string(),
  lastName: joi.string(),
});

const querySchema = joi.object({
  lang: joi.string(),
});

const paramsSchema = joi.object({
  id: joi.string(),
});

// // // || JOI SCHEMA  || \\ \\

app.post(
  '/test',
  validata(
    { body: bodySchema, query: querySchema, params: paramsSchema },
    {
      baseSchema: {
        query: [baseSchema],
      },
    },
  ),
  (req, res) => {
    return res.status(200).json({
      status: true,
      message: 'search successful',
      data: 'good',
    });
  },
);

app.listen(app.get('port'), () => {
  console.log(
    '  App is running at http://localhost:%d in %s mode',
    app.get('port'),
    app.get('env'),
  );
  console.log('  Press CTRL-C to stop\n');
});

Explanation

You can validate different data sources (e.g req.body, req.query, req.params) by defining joi schemas for each source. You could even define a generic schema that's re-usable across many routes and set it as baseSchema for the intended data source. These generic joi schema (re-usable joi schema component) gets concatenated to the mainSchema and therefore forms a whole enforcable joi schema

Testing

You can clone the repo and move the sandbox folder to a folder on the same level with express-validata. Run the following command in express-validata folder

npm link

Run the following command in sandbox folder

npm link express-validata

You can now play as you like in the sandbox!

How can I support the developers?

• Star our GitHub repo ⭐
• Create pull requests, submit bugs, suggest new features or documentation updates 🔧

• Follow us on Twitter

License

MIT license.

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