Is there a way to convert a date value to a User's timezone in Mongoose? - mongodb

Question

I have searched everywhere, StackOverflow and else where but I can't seem to find a fix for my problem. I have a mongoose schema like this:
// user.model.js
const mongoose = require('mongoose');
const User = new Schema({
firstName: String,
lastName: String,
tz: String,
registrationDate: {
type: Date,
default: Date.now(),
}
})
And I have a controller which creates a User like this:
// user.controller.js (async)
let user = await User.create({
'firstName': 'John',
'lastName': 'Doe',
'tz': 'Africa/Kampala'
});
await reply.send(user); // I am using Fastify framework
No matter what I do, when the User is returned it always gives the UTC time and not the time that the User actually is in. have tried using Mongoose transform:
// Transform on the schema
const moment = require('moment-timezone');
const User = new Schema({
// Schema definitions
}, {
toJSON: {
transform: function (doc, ret) {
ret.registrationDate= moment.tz(doc.registrationDate, doc.tz).format();
return ret;
}
}
})
And have also tried using get like this:
const User = new Schema({
// Other definitions
registrationDate: {
type: Date,
default: Date.now(),
get: convertDate
}
})
function convertDate(registrationDate) {
return moment.tz(registrationDate, this.tz).format()
}
But no luck. I would appreciate any assistance or guidance in getting this to work on the model. Thanks!