How do you query data using Mongoose within a service function? - node.js

Question

I have a service in my node application where I am trying to use nodemailer to send an email with a link to clients. The issue I am having is that when I try to query the recipient email address using Mongoose in the service I get this response message in the console log Promise { <pending> } and obviously my email does not send because I am not returning an email address. I am using the code below as the service that is called from my controller. It looks like everything is working fine in the controller because when I use a test email address as the recipient email the message is sent and function returns no errors. Am I writing the function to query the email wrong or is there a better way I should be setting this up?
var nodemailer = require('nodemailer');
const Obrf = require("../models/Obrf");
const sendLink = (x) => {
var id = x;
const offerid = id.toString();
const url = 'http://localhost:3000/offerletter/' + offerid
async function returnEmail (y) {
const email = await Obrf.findById(y, 'email_address').exec();
return email;
};
const sendToEmail = returnEmail(id);
console.log(sendToEmail);
var transporter = nodemailer.createTransport({
service: 'gmail',
auth: {
user: 'sender#gmail.com',
pass: 'password'
}
});
var mailOptions = {
from: 'sender#gmail.com',
to: sendToEmail,
subject: 'Congratulations on your offer!',
text: 'Go to: ' + url + ' to sign your offer letter!'
};
transporter.sendMail(mailOptions, function(error, info){
if (error) {
console.log(error);
} else {
console.log('Email sent: ' + info.response);
}
});
};
module.exports = {
sendLink,
};

Answer 1

async before a function makes the function return a promise:
are you sure if Obrf.findById(y, 'email_address').exec() returning promise ?
if not remove the aysnc await
function returnEmail (y) {
const email = Obrf.findById(y, 'email_address').exec();
return email;
};
const sendToEmail = returnEmail(id);
if its returning the promise then do something like this
const sendToEmail = returnEmail(id).then(id=>id);