的Rails：belongs_to的特定列

Question

我有以下模式：在這種情況下remote_restaurant：

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 

我怎樣才能添加belongs_to的？

Answer 1

添加belongs_to的與您的自定義foreign_key和primary_key

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

Answer 2

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