1 require 'mongo_mapper' 2 MongoMapper.database = "app1" # DB名 1 class Player 2 include MongoMapper::Document 3 key :name, String, :required => true 4 key :policy, Integer 5 key :renkei, String 6 key :note, String 7 timestamps! 8 9 validates_uniqueness_of :name 10 end 1 Player.count 2 => 822 3 4 Player.count(:renkei=>'萩原型') 5 => 135 6 7 Player.first 8 => #<Player label: "萩原 忠志" ..