rails 3.1 - has_one，通過

Question

是否有可能使has_one關係像這樣工作？

我希望能夠能夠加載的記錄是這樣的：

@person = Person.find(1) => {Person id: 1, favorite_house_id: 10} 
@person.favorite_house => {House id: 10....) 

class Person < ActiveRecord::Base 
    has_many :houses, through: :person_houses 
    has_one :favorite_house, through: :person_houses  
end 

class PersonHouse < ActiveRecord::Base 
    belongs_to :house 
    belongs_to :person 
end 

class House < ActiveRecord::Base 
    has_many :people, through: :person_houses 
end 

Answer 1

通過替換人的has_one關係：

belongs_to :favorite_house, :class_name => "House" 

不要忘記在表中創建一列favorite_house_id人。