ruby-on-rails - rails +MongoDB : Find ObjectId bigger than given value

Question

我正在尝试在 MongoDB 中查找下一个(最新的)文档:

Article.find({'_id' => { "$gt" => Moped::BSON::ObjectId(id_from_database)}})

但是每次我运行这个查询，我都会得到

Problem:
  Document(s) not found for class Article with id(s) {"_id"=>{"$gt"=>"given value"}}.

我已经安装了这些 gem:

gem 'mongoid'
gem 'bson'
gem 'bson_ext'

但还是找不到问题...我将不胜感激!

谢谢

Answer 1

下面将返回下一个对象

Article.where({:_id => {:$gt => id_from_database}}).sort({:_id=>1}).first