gistfile1.rb

#!/usr/bin/env ruby
#
# A one file test to show ...
require 'rubygems'
require 'dm-core'


# setup the logger
DataMapper::Logger.new(STDOUT, :debug)

# connect to the DB
DataMapper.setup(:default, 'sqlite3::memory:')


class Search
  include DataMapper::Resource
  property :id, Serial
end

class Result
  include DataMapper::Resource
  property :id, Serial
  belongs_to :search
end

DataMapper.auto_migrate!

# play with this number, and watch the number of subsequent selects change
10.times do
  Search.create
end


20.times do
  if rand > 0.1
    Result.create(:search_id => rand(10)+1)
  else
    Result.create
  end
end

puts "-"*80

Result.all.each do |r|
  puts r.search.inspect
end