Ember.js: Reloading a .hasMany relationship given through “links” in payload

DS.Model.reopen({
  reloadLink: function (linkKey) {
    if ($.isArray(linkKey)) {
      var promises = [];
      for (var i = 0; i < linkKey.length; i++) {
        promises.push(this.reloadLink(linkKey[i]));
      }
      return Em.RSVP.all(promises);
    } else {
      var rel = this._relationships[linkKey];
      if (rel) {
        if (rel.reload) {
          return rel.reload();
        } else if (rel.fetchLink) {
          return rel.fetchLink();
        }
      }
    }
  }
});

Example:

model: function () {
    var model = this.modelFor('_some_model_');
    return model.reloadLink(['link1', 'link2']).then(function () {
      return model;
    });
}