Updating more than one MongoDB document in NodeJS doesn't seem to work

Question

So I know this question has been asked many times but I\'ve looked it up for over 30 minutes and I honestly can\'t find what I\'m doing wrong.

I want to update my mongo

Answer 1

As noted in the docs for update, if you don't want to provide a callback, you need to call exec on the returned Query to execute it:

To update documents without waiting for a response from MongoDB, do not pass a callback, then call exec on the returned Query

So either chain an exec call on your update or provide a callback:

function updateUsers(){
    UserModel.update({}, {$set: {userName: 'JOHN CENA'}}, {multi:true}).exec();
}

OR

function updateUsers(){
    UserModel.update({}, {$set: {userName: 'JOHN CENA'}}, {multi:true},
        function(err, numAffected) {...});
}