var User = db.seq.define('User',{
    username: { type: db.Sequelize.STRING},
    email: { type: db.Sequelize.STRING},
    password: { type: db.Sequelize.STRING},
    sex : { type: db.Sequelize.INTEGER},
    day_birth: { type: db.Sequelize.INTEGER},
    month_birth: { type: db.Sequelize.INTEGER},
    year_birth: { type: db.Sequelize.INTEGER}

});

User.sync().success(function(){
    console.log("table created")
}).error(function(error){
    console.log(err);
})


var Post = db.seq.define("Post",{
    body: { type: db.Sequelize.TEXT },
    user_id: { type: db.Sequelize.INTEGER},
    likes: { type: db.Sequelize.INTEGER, defaultValue: 0 },

});

Post.sync().success(function(){
    console.log("table created")
}).error(function(error){
    console.log(err);
})

db.seq.query('SELECT * FROM posts, users WHERE posts.user_id = users.id ').success(function(rows){
            res.json(rows);
        });

User.hasMany(Post, {foreignKey: 'user_id'})
Post.belongsTo(User, {foreignKey: 'user_id'})

Post.find({ where: { ...}, include: [User]})

SELECT `posts`.*, `users`.`username` AS `users.username`, `users`.`email` AS `users.email`, `users`.`password` AS `users.password`, `users`.`sex` AS `users.sex`, `users`.`day_birth` AS `users.day_birth`, `users`.`month_birth` AS `users.month_birth`, `users`.`year_birth` AS `users.year_birth`, `users`.`id` AS `users.id`, `users`.`createdAt` AS `users.createdAt`, `users`.`updatedAt` AS `users.updatedAt` FROM `posts` LEFT OUTER JOIN `users` AS `users` ON `users`.`id` = `posts`.`user_id`;