Question

I’m trying to make a rails model that contains two different “has_one” attributes of the same class. I feel like there is an easier way to do this, but I can’t think of it right now.

So, lets say I’d like to create a wedding model in rails

class Wedding < ActiveRecord::Base
  has_one :groom, :class_name => 'Person'
  has_one :bride, :class_name => 'Person'
end


class Person < ActiveRecord::Base
  attr_accessible :wedding_id

  belongs_to :wedding
end

My goal is to have access to the groom object from the wedding object. (be able to call @wedding.groom.name or whatever) Currently there is no way for the Wedding Model to know which “person” is the Bride and which is the Groom.

Should I be using single table inheretance? Or should I be using foreign keys?

Is there a better way to think of the whole problem?

Answer 1

Your associations are backwards for the functionality that you want..

class Wedding < ActiveRecord::Base
  belongs_to :groom, :class_name => 'Person'
  belongs_to :bride, :class_name => 'Person'
end

class Person < ActiveRecord::Base
  has_many :weddings  # who has just one wedding now days???
end

Wedding.find(params[:id]).groom.name

Person.find(params[:id]).weddings.last  # hopefully first also  :)