why mongoose queries dos not work when put inside promise function

Question

My code is as shown below:

checkAndCreateUser(customer_id, email_id).then(result => {
        console.log(\"result is \" + result);
    });

var checkAndCreat         


        

Answer 1

You forgot save your user, besides Mongoose already returned promise, you don't need use callbacks:

var checkAndCreateUser = function (custom_id, email) {
    return User.create({ ph_no :ph_no,
                         email_id :email})
    .then(result=>{
        return User.findOne({'email_id': email})
    })
    .then(user=>{
       return user._id;
    })
};

As for mistake in your function:

...
let user = new User({email_id: email, ph_no: phone});
user.save();//you forgot about this
...

You can use save() with callback:

user.save((err, result)=>{...});

Or with promise:

 user.save().then(result=>{...}).catch(err=>{...});