gistfile1.rb

DataMapper.setup(:default, "sqlite3:users.db")

class Post
  include DataMapper::Resource
  
  has n, :voters
  
  property :id,         Serial
  property :user,       String, :required => true
  property :line,       Text,   :required => true
  property :created_at, DateTime
  property :votes,      Integer, :default => 0
  property :score,      Integer, :default => 0
  property :ip,         String
end

class Voter
  include DataMapper::Resource
  
  belongs_to :post
  
  property :id,       Serial
  property :ip,       String
  property :positive, Boolean
end