Question

How to validate a name to have min - max chars, not be empty and contain only letters and spaces in Node.js and Express

Answer 1

const express = require('express');
const { check, validationResult } = require('express-validator');

const router = express.Router();

router.post(
  '/',
  [
    check('first_name')
      .not()
      .isEmpty()
      .withMessage('Please enter First Name')

      .isLength({ min: 3, max: 25 })
      .withMessage('First Name must be 3-25 characters long')

      .matches(/^[a-zA-Z ]+$/)
      .withMessage('First Name must contain only letters and spaces')
  ],
  (req, res) => {
    const errors = validationResult(req);
    if (!errors.isEmpty()) {
      return res.status(400).json({ errors: errors.array() });
    }
    res.send('User details okay');
  }
);


module.exports = router;

// Postman 

/*
{
	"first_name": "Avi"
}
*/

/*

run:

User details okay

*/

 

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