sequelize-hierarchy: findAll() does not return simple nested JSON

Maybe I’m doing something wrong or perhaps something broke in recent version of Sequelize. When I run findAll({hiararchy: true}) I don’t get a simple JSON output like what is shown in the example on the front page. I even tried using the attributes keyword to select 3 columns but it still has all the Sequelize meta data. If I use “raw:true” then I get a simple JSON object but there is no nesting.

Model/index.js (from sequelize express example)

"use strict";

var fs        = require("fs");
var path      = require("path");
var Sequelize = require("sequelize");
var env       = process.env.NODE_ENV || "development";
var config    = require(path.join(__dirname, '..', 'config', 'config.json'))[env];
var sequelize = new Sequelize(config.database, config.username, config.password, config);
var db        = {};

fs
  .readdirSync(__dirname)
  .filter(function(file) {
    return (file.indexOf(".") !== 0) && (file !== "index.js");
  })
  .forEach(function(file) {
    var model = sequelize.import(path.join(__dirname, file));
    db[model.name] = model;
  });

Object.keys(db).forEach(function(modelName) {
  if ("associate" in db[modelName]) {
    db[modelName].associate(db);
  }
});


db.sequelize = sequelize;
db.Sequelize = Sequelize;

module.exports = db;

Model

"use strict";

var SequelizeH = require('sequelize-hierarchy')();

module.exports = function(sequelize, Sequelize) {

  var Category = sequelize.define('Category', {
    name: {
      type:Sequelize.STRING,
      allowNull: false
    }
  }, {underscored: true});

  Category.isHierarchy();

  return Category;
}

findAll

var models = require("../models");
models.Category.findAll({
    hierarchy: true,
    attributes: ['id','parent_id', 'name']
  }).then(function(results) {
    console.log(results)
    res.render('index', { nested_cat: results });
  });