Question

I have a problem I find difficult to search the web for an answer…

I have in my Ruby On Rails two models: User and Donation.

I want that a Relation has two user: user1 gives 10$ to user2.

This is what I came with:

class Donation < ActiveRecord::Base
  attr_accessible :description, :value, :from_user_id, :to_user_id

  def from_user
     User.find(from_user_id)
  end

  def to_user
     User.find(to_user_id)
  end

end

But I would like to use relationships… Do you know the best way of doing this?

Thanks a lot 🙂

Answer 1

has_one :from_user, :class_name => 'User', :foreign_key => 'from_user_id'
has_one :to_user, :class_name => 'User', :foreign_key => 'to_user_id'

Relations are nothing special… well, okay, they are now, but this essentially constructs the appropriate sql. I think. Haven’t tried it.