Ruby on rails Rails：属于特定列

我有以下型号：

class User < ActiveRecord::Base

  #method that I want to delete and replace with belongs_to
  def restaurant
      RemoteRestaurant.find_by_shortRD(self.INFO_SHORT_RD)
  end
end

class用户

---

在这种情况下，如何添加“属于”：远程餐厅？

使用自定义外键和主键添加“属于”

class User < ActiveRecord::Base
    belongs_to :remote_restaurant, :foreign_key => "INFO_SHORT_RD", :primary_key=>"shortRD"
end

class用户“信息短键”；：主键=>“短键”
结束

类用户

你能试试

属于：远程餐厅，外键：'shortRD'

？我现在无法测试它，也记不清确切的语法。那个INFO\u SHORT\u RD常量是怎么回事？

class User < ActiveRecord::Base
  belongs_to :restaurant, class_name: 'RemoteRestaurant', foreign_key: :shortRD, primary_key: :INFO_SHORT_KEY
end