我开始将NoSQL与Ruby结合使用。这是我的代码require'mongo'require'mongo_mapper'classUserincludeMongoMapper::DocumentendMongoMapper.connection=Mongo::Connection.new('localhost',27017)MongoMapper.database="mydb"all_users=MongoUser.where(:age=>1)#WORKSall_users=MongoUser.where("age>1")#DOESN'TWORK如何使用ActiveRecord的lik