MongoDB distinct, return all fields

I'm using MongoDB and the node-mongodb-native driver.

I'm trying to return all records with a distinct attribute.

This seems to work, however it only returns the value which I'm checking for being distinct, not all values in each document.

This is what I have tried to return just the name field, I've also tried without it and variations of, but it always only returns the item_id's in an array.

    this.collection.distinct("item_id", [{"name" : true}, {sold : {"$exists" : true}}], function(err, results) {
        if (err) {
            callback(err);
        } else {
            console.log(results);
        }
    });

Any suggestions how to get all the data from each document?

Thank you!

EDIT: Using Map Reduce

So, I just setup the start of a map reduce, using the node-mongodb-native, here's what I have so far:

    var map = function() {
        emit(this._id, {"_id" : this._id, "name" : this.name});
    }

    var reduce = function(key, values) {

        var items = [];

        values.forEach(function(v) {
            items.push(v);
        }); 

        return {"items" : items};
    }

    this.collection.mapReduce(map, reduce, {out: "res"}, function(err, results) {
        if (err) {
            console.log(err);
        } else {
            console.log(results);
        }
    });

I know the logic isn't in there for distinct, but the results is the db object, I can't use 'toArray' on it. Any ideas why this might be?