gistfile1.rb

#!/usr/bin/env ruby -Ku
 
# encoding: utf-8
 
require 'rubygems'
require 'dm-core'
require 'dm-types'

 
DataMapper::Logger.new($stdout, :debug)
DataMapper.setup(:default, "sqlite3:///#{Dir.pwd}/examine.db") 
 
class Seating
  include DataMapper::Resource
 
  property :id, Serial
  property :days, Flag[:monday, :tuesday, :wednesday, :thursday, :friday, :saturday, :sunday]

end
 
DataMapper.auto_upgrade!

if (!Seating.first())
  s = Seating.new()
  s.save()
  p s

  s.days = [:monday] 
  s.save() # This works.
  p s # :monday
  s.days << :tuesday
  p s # :monday, :tuesday
else
  p Seating.first() # :monday
end