moment js not updating in mongoose - mongodb

Question

So I am having trouble with momentjs. The timestamp is not updating when I make a post call. I waited for 30 seconds to make another post call and I still get the same time. How can I fix this? Below is my code so let me know what I am doing wrong.
var mongoose = require('mongoose');
var moment = require('moment');
var now = moment();
var UserSchema = new mongoose.Schema({
email: { type: String, default: ''},
name: { type: String, default: ''},
password: { type: String, default: ''},
timestamp: {type: String, default: now.format("dddd, MMMM Do YYYY, h:mm:ss a")}
});
module.exports = mongoose.model('UserSchema', UserSchema);
module.exports = {
find: function(params, callback) {
User.find(params, function(err, result) {
if (err) {
callback(err, null);
return;
}
callback(null, result);
return;
});
},
create: function(params, callback) {
User.create(params, function(err, result) {
if (err) {
callback(err, null);
return;
}
callback(null, result);
return;
});
}
}
router.post('/', function(req, res, next) {
UserController.create(req.body, function(err, result) {
if (err) {
res.json({
confirmation: 'fail',
message: err
});
return;
}
res.json({
confirmation: 'success',
result: result
});
return;
});
return;
});

Answer 1

This line of code will only be executed once, when the module is loaded:
var now = moment();
So the same value of now will be used for all documents.
Instead, your schema definition should use a function which will be called each time a new document is created:
var UserSchema = new mongoose.Schema({
email: { type: String, default: ''},
name: { type: String, default: ''},
password: { type: String, default: ''},
timestamp: {
type: String,
default: () => moment().format("dddd, MMMM Do YYYY, h:mm:ss a")
}
});
As a side note, consider using a Date data type instead of string for your timestamp as it's more flexible and efficient.