calling an async function from another js file

Question

I have a function which gets all record in my collection in mongodb.

var getVouchers= function(){

  Customer.find({}, function(err, result) {
    if (err) throw err;
    return result;
  });     
};

I call like this and when I put break point, I can see that I have result. The problem is, when I call this function, it does not wait..

As it is nodejs, I exported the function as follow

module.exports.getVouchers =getVouchers;

and I call like this

var router = require('./api');

adminPanel.get('/', (req,res)=>
{
  router.getVouchers().then((result)=>{
    console.log(result);
  });        
});

and I got the following exception

(node:26972) [DEP0016] DeprecationWarning: 'GLOBAL' is deprecated, use 'global'

event I do not use GLOBAL keyword

how to solve this problem?

edit:

I updated the my code now

var  getVouchers = function() {
    // `delay` returns a promise
    return new Promise(function(resolve, reject) {

    Customer.find({}, function(err, result) {
        if (err) throw err;

         return result;

      });     
    });
  }

and I call the function as

  (async function(){
        let vouchers=await router.getVouchers();
        console.log(vouchers);
      })();

the first function has the result but there is no return value, that means, it never comes to the console.log part.

Edit 2:

Instead of return result, as @ajuni880 said, I made resolve(result); and it works now.

You can ignore the warning, but focus on your `getVouchers` function definition: You call it with `then` but it is neither a Promise nor declared as an async one. — vahdet, Mar 01 '19 at 08:33
@CertainPerformance thank you for the answer.. the main question is that I do not have any result — ertan2002, Mar 01 '19 at 08:37
@tkausl I've updated the my code with the help of the link that you gave but still not working — ertan2002, Mar 01 '19 at 08:38
You have to resolve your promise to be able to get the results — hawks, Mar 01 '19 at 08:38
@vahdet thank you for the answer vahdet. I do not have much experience in js. I've just made it with promise, I can still get a result but no return value — ertan2002, Mar 01 '19 at 08:38
@ajuni880, you should write an answer and I'll accept it as the correct answer. — ertan2002, Mar 01 '19 at 08:45

calling an async function from another js file

0 Answers0