Double JOIN on the same table

gistfile1.txt

  app.get('/plans/:plan_id', function (req, res) {
    models.Plan.find({
      where: {id: req.param('plan_id')}, 
      include: [
        {
          model: models.Order,
          as: "pending_orders"
        },
        {
          model: models.Order,
          as: "completed_orders"
        }
      ]
    })
    .success(function(plan) {
      res.json(plan);
    }).error(function(err) { 
      res.status(400).json({error: err.message});
    });
  });

order.js

"use strict";
module.exports = function(sequelize, DataTypes) {
  var Order = sequelize.define("Order", {
    number: DataTypes.STRING,
    total: DataTypes.DECIMAL(10,2),
    state: DataTypes.STRING
  }, {
    classMethods: {
      associate: function(models) {
        Order.belongsTo(models.User, {foreignKey: 'user_id'});
        Order.belongsTo(models.Plan, {foreignKey: 'plan_id'});
      }
    }
  });
  return Order;
};

plan.js

"use strict";
module.exports = function(sequelize, DataTypes) {
  var Plan = sequelize.define("Plan", {
    shipment_interval: DataTypes.INTEGER,
    payment_interval: DataTypes.INTEGER,
  }, {
    classMethods: {
      associate: function(models) {
        Plan.hasMany(models.Order, {foreignKey: 'plan_id', as: "completed_orders", scope: {state: "completed"}});
        Plan.hasMany(models.Order, {foreignKey: 'plan_id', as: 'pending_orders', scope: {state: "pending"}});
      }
    }
  });
  return Plan;
};