I'am using MongoDB with a nodejs REST service which exposes my data stored inside. I have a question about how to interrogate my data which uses $ref.

Here is a sample of an Object which contains a reference to another object (detail) in anther collection :

{

    _id : ObjectId(5962c7b53b6a02100a000085),

    Title : test,

    detail : {

        $ref : ObjDetail,

        $id : ObjectId(5270c7b11f6a02100a000001)

    },

    foo : bar

}

Actually, using Node.js and mongodb module, I do the following :

db.collection(Obj).findOne({_id : new ObjectID(5962c7b53b6a02100a000085},

function(err, item) {

    db.collection(item.$ref).findOne({_id : item.$id}, function(err,subItem){

        ...

    });

});

In fact I make 2 queries, and get 2 objects. It's a kind of lazy loading (not exactly but almost)

My question is simple : is it possible to retrieve the whole object graph in one query ?

Thank you