In node js how to get the result of the other module method in current module

Question

In node js how to get the result of the other module method in current module

ModuleTwo.js

exports.getNotificatiosById = function (notificationId) {

db.get(notificationId, function (err, doc) {

   if(!err){
     return true;
    }
 });

 };

In modulelOne i need to get the result of the moduleTwo method.If moduleTwo method doesn't have the database query function means i can get that method result like below in moduleOne

   var res=require('./lib/moduleTwo').getNotificatiosById;

If that db.get method has the synchronize method means i can do the query like

  db.getSync(id);

Is there any other way to get the result of my moduleTwo method.Now i'm trying like below.Is it correct

moduleOne.js

     var moduleTwo=require('./lib/moduleTwo');

     moduleTwo.getNotificatiosById(id,function(err,res){
        if(!err){
          console.log('Result of the 2nd module is '+res);
        }
     });

node.js

Answer 1

You need to change getNotificatiosById to take a callback

exports.getNotificatiosById = function (notificationId,callback) {

db.get(notificationId, function (err, doc) {
   if(!err){
     callback(doc);
     return true;
    }
 });

 };

Then call it like

 var moduleTwo=require('./lib/moduleTwo');

 moduleTwo.getNotificatiosById(id,function(res){
      console.log('Result of the 2nd module is '+res);
 });