How to get currently save documents _id in Node js & mongodb?

Question

I am working with node js & mongodb. Current I need some help to retrive _id for a saved document.

My Code :

var user= new User();
user.name = 'Name';
user.email = 'test@gmail.com';
user.save(function(err){
    if(!err)
     {
          console.log('Saved');
          // Need this documents _id
     }
})

How can I get this _id ? Need help for this.

Answer 1

you must add second arg for callback in save method.

var user= new User();
        user.name = 'Name';
        user.email = 'test@gmail.com';
        user.save(function(err, user){ // here you must add user 
            if(!err)
             {
                  console.log('Saved');
                  user._id // id for user 
             }
        })