Ember-Data recursive hasMany association

Has anyone used ember-data to model a tree of data?

I would assume it would be something like:

Node = DS.Model.extend({
    children: DS.hasMany(Node),
    parent:   DS.belongsTo(Node)
});

However, I have not been able to get this working which leads be to believe that either: 1) I'm just plain wrong in how I'm setting this up or, 2) it is not currently possible to model a tree using ember-data.

I'm hoping that it's the former and not the latter...

Of course it could be the JSON...I'm assuming the JSON should be of the form:

{
    nodes: [
        { id: 1, children_ids: [2,3], parent_id: null },
        { id: 2, children_ids: [], parent_id: 1 },
        { id: 3, children_ids: [], parent_id: 1 }
    ]
}

Any tips/advice for this problem would be greatly appreciated.