associations in sequelize

hasmany-belongsto.js

var Manufacturer = sequelize.define('manufacturer', {
  name:DataTypes.STRING
});

var GraphicsCard = sequelize.define("graphics_card", {
  model:DataTypes.STRING,
  RAM:DataTypes.INTEGER
});
  
GraphicsCard.belongsTo(Manufacturer);
Manufacturer.hasMany(GraphicsCard);

var amd = Manufacturer.create({name:'AMD'});
var gc650m = GraphicsCard.create({model:'650m', RAM:2});

gc650.setManufacturer(amd);