sample.rb

require "redis"
require "nest"

redis = Redis.new
users = Nest.new(:users, redis)
posts = Nest.new(:posts, redis)

user = users[users.incr]
user.hmset(:name, "Albert")

post = posts[posts.incr]

redis.multi do
  post.hmset(:title, "foo", :content, "bar", :author, user)
  user[:posts].sadd(post)
end