I think you can accomplish what you need with :has many :through. You'll need another table to store the relationships as Ar Chron suggested.
On Apr 8, 3:07 am, Joe <[email protected]> wrote: > A vanilla polymorphic belongs_to association allows different > association instances to have targets in different classes. I want to > do a has_many association where different association instances have > different foreign_keys. Is such a thing possible? > > My schema looks like > > create_table "people", :force => true do |t| > t.string "name" > t.string "sex" > t.integer "father_id" > t.integer "mother_id" > end > > and my model I want something like: > > class Person < ActiveRecord::Base > belongs_to :father, :class_name => "Person" > belongs_to :mother, :class_name => "Person" > > #I want something like this is invalid syntax > has_many :children, :class_name => "Person", :foreign_key => ( sex > == 'M' ? :father_id : :mother_id ) > end > > Will it be hard to create an association that can handle this? > > Thanks in advance for any advice you can give me, > Joe -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
