How can I use express-validator with MongoDB?

How can I use express-validator with MongoDB?

You can use express-validator to validate incoming data in your Express.js application before saving it to MongoDB. First, install express-validator.

What are the basic validation methods I can use?

Some basic validation methods include isEmail(), isLength(), and isNumeric(). You can chain these methods to validate different fields.

Can you show me a code example?

Sure! Here's a simple example:

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

app.post('/user', [
  body('email').isEmail(),
  body('password').isLength({ min: 5 })
], (req, res) => {
  const errors = validationResult(req);
  if (!errors.isEmpty()) {
    return res.status(400).json({ errors: errors.array() });
  }
  // Proceed to save user to MongoDB
});