查询蒙古包和红宝石的集合

Question

I want to query many different collections from a model in rails.

For example:

class Statistics
  include Mongoid::Document
end

I want to be able to query a statistics or maybe a my_stats collection. Is that possible? How can I do it?

Answer 1

Your question isn't clear. If you want to know how to define your own collection name, instead of having Mongoid auto-generate one via the class name/ActiveSupport, you can do that using the store_in method. Like so:

class Statistics
  include Mongoid::Document
  store_in :mystats
end

If you're asking how to search multiple collections with one query, that isn't possible in MongoDB, as far as I'm aware.