gistfile1.rb

 class Sweatshop
    self.record_map = Hash.new {|h,k| h[k] = Hash.new {|h,k| h[k] = 0}}
    
    def self.record(klass, name, instance)
      # self.record_map[klass][name.to_sym] << instance
      self.record_map[klass][name.to_sym] += 1
      instance
    end
    
    def self.pick(klass, name)
      # self.record_map[klass][name.to_sym].pick || raise(NoFixtureExist, "no #{name} context fixtures have been generated for the #{klass} class")
      offset = (rand * self.record_map[klass][name.to_sym]).to_i + 1 
      klass.first(:offset => offset) || raise(NoFixtureExist, "no #{name} context fixtures have been generated for the #{klass} class")
    end
    
  end