Node.js function returns before mongo db has completed task

I simply want to return the collection from the mongo db to use it in an other part of the program.

I assume that I have to use call back functions. I tried many times but it never works. The return gets executed before the db has completed.

    function getAllJobs() {
            var MongoClient = mongo.MongoClient;
            var url = 'mongodb://localhost:27017/uniyapp';

            MongoClient.connect(url, function(err, db) {
                queryCollection`enter code here`(db.collection('jobs'), db, function(result, db){
                console.log(result);
                //You can do more stuff with the result here
                return result
                });
        });

Here the function for finding the collection:

function queryCollection(collection, db, callback){
    collection.find().toArray(function(err, result) {
        if (err) {
            console.log(err);
            db.close();
        } else if (result.length > 0) {
            callback(result, db);
            db.close();
        } else {
            db.close();
        }
    });
}

It would help me so much if I could solve this problem. Thanks in advance!

via dermaschder