gistfile1.rbx

## post.rb

class Post < ActiveRecord::Base
  has_many :comments

  def after_initialize
    comments.first
  end
end

## comment.rb

class Comment < ActiveRecord::Base
  belongs_to :post

  def after_initialize
    puts "post.id = #{post.id}"
  end
end

## irb session

>> Post.first
ActiveRecord::StatementInvalid: SystemStackError: stack level too deep

# FUCK !!!