Question

是否可以使has_one关系像这样工作？

我希望能够加载这样的记录：

@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

将Person的has_one关系替换为：

belongs_to :favorite_house, :class_name => "House"

不要忘记在Person表格中创建一个列favorite_house_id。

rails 3.1 - has_one，through

1 个答案: