Playing with datamapper

gistfile1.rb

require 'rubygems'
require 'dm-core'
require 'dm-migrations'

# An in-memory Sqlite3 connection:
DataMapper.setup(:default, 'sqlite::memory:')

# Defining models
class Post
  include DataMapper::Resource

  property :id,         Serial    # An auto-increment integer key
  property :title,      String    # A varchar type string, for short strings
  property :body,       Text      # A text block, for longer string data.
  property :created_at, DateTime  # A DateTime, for any date you might like.
end
# ---


if __FILE__ == $0
  # Createing tables
  DataMapper.finalize
  DataMapper.auto_migrate!
  # ---

  @post = Post.create(
    :title      => "My first DataMapper post",
    :body       => "A lot of text ...",
    :created_at => Time.now
  )

  @post = Post.new(:title => "Another on", :body => "Lorem ipsum dolore")
  @post.save
  
  # Printing all posts
  Post.each do |post|
    puts '===================================='
    [:title, :body, :created_at].each do |attr|
      puts "#{attr}: #{post[attr]}"
    end
    puts '===================================='
  end
end