小编PJ *_*ins的帖子

请参阅以下关联:

class Continent < ActiveRecord::Base
    has_many :countrys

class Country < ActiveRecord::Base
    belongs_to :continent
    has_many :addresses

class Address < ActiveRecord::Base
    belongs_to :person
    belongs_to :street

class Person < ActiveRecord::Base
    has_many :addresses

Person.includes()在查询数据库时,如何从一直到非洲大陆开始并包含关联.

我已经能够通过国家进入.includes(addresses: :country),但似乎没有达到最后一级.