blarg.rb

# app/models/post.rb
class Post < ActiveRecord::Base
  has_one :comment

  def name
    "I'm overriding a delegated method!"
  end
end

# app/models/comment.rb

class Comments < ActiveRecord::Base
  belongs_to :post

  delegate :name, :to => :post
end


############################################

@post = Post.create!
comment = @post.comment.build(:name => "Waffles")

@post.name
>> "I'm overriding a delegated method!"