## the problem
class AuditLog < ActiveRecord::Base
  belongs_to :developer, :validate => true
  belongs_to :unvalidated_developer, :class_name => 'Developer'
end


log = AuditLog.new(:message => "")

log.developer = 1
log.unvalidated_developer = 2

# log.developer_id is 1.

## source of discovery:
class ForumPost < ActiveRecord::Base
  belongs_to :author, :class_name => "User"
end

class ForumThread < ActiveRecord::Base
  has_many :forum_posts
  attr_accessor :body, :author
  after_create :create_initial_post

  def create_initial_post
    post = forum_posts.new(:body => body, :author => author)
    # omg post.user_id is nil!
  end
end