小编Ind*_*igo的帖子

我已经看到1:N的这类问题的解决方案,但他们似乎没有读到1:1,这是使用MongoDB 1.8,Mongoid 2.0.0.rc.8,Rails 3.0.5

class Coach  
  include Mongoid::Document 
  field :name, :type => String 
  belongs_to :coached, :class_name => Team, :inverse_of => :coach, :foreign_key => "coach_id" 
  belongs_to :assisted, :class_name => Team, :inverse_of => :assist, :foreign_key => "assist_id" 
end 


class Team 
  include Mongoid::Document 
  field :name, :type => String 
  has_one :coach, :class_name => Coach, :inverse_of => :coached 
  has_one :assist, :class_name => Coach, :inverse_of => :assisted 
end 

然后我开始和Rails控制台会话和:

irb(main):001:0> c = Coach.new(:name => "Tom")  
=> #<Coach _id: da18348d298ca47ad000001, _type: nil, _id: BSON::ObjectId('4da18348d298ca47ad000001'), name: "Tom", coach_id: …