Get username from jwt Express app - node.js

Question

I have 3 routes in my code , for Users, for Products and For Orders.
I use jwt and generate tokens for users, and I want to assign orders to token Owners.
Here's my Order Model :
var mongoose = require('mongoose');
var orderSchema = mongoose.Schema({
_id: mongoose.Schema.Types.ObjectId ,
product: {type: mongoose.Schema.Types.ObjectId, ref: 'Product'},
quantity: {type: Number , default: 1},
user_name: String
});
module.exports = mongoose.model('Order', orderSchema);
And here's my middleware to check Authenticate (It's imported as checkAuth) :
module.exports = (req,res,next) => {
try {
var decoded = jwt.verify(req.headers.token, secretjwt);
req.userData = decoded;
next();
} catch (error) {
return res.status(401).json({
'error': 'Auth Failed',
'details': error.message
});
}
Here's my post api for adding orders, What Should I write as user_name to assign it to the user (I don't want to get username as a body parameter)?
router.post('/newOrder', checkAuth, (req,res,next) => {
var order = new Order({
quantity: req.body.quantity,
product: req.body.productId,
user_name: // WHAT SHOULD IT BE?
});
order.save()
.then(result => {
res.status(200).json(result);
})
.catch(err => {
res.json(200);
});
});
Thanks in advance!

Answer 1

Instead of
req.userData = decoded
put
req.body.userData = decoded
And put user_name: req.body.userData in following snip
router.post('/newOrder', checkAuth, (req,res,next) => {
var order = new Order({
quantity: req.body.quantity,
product: req.body.productId,
user_name: // WHAT SHOULD IT BE?
});
order.save()
.then(result => {
res.status(200).json(result);
})
.catch(err => {
res.json(200);
});
});