friend migration.rb

class FriendMigration < ActiveRecord::Migration
  def self.up
    create_table :friends do |t|
      t.string :name, :null => false
      t.string :email, :null => false, :unique => true
      t.boolean :admin, :default => false
      t.string :crypted_password
      t.timestamps
    end
  end

  def self.down
    drop_table :friends
  end
end

stuck int he middle with you.rb

class Follow < ActiveRecord::Base
  belongs_to :follower, :class_name => 'Friend'
  belongs_to :following, :class_name => 'Friend'

  def reciprocate
    update_attribute :reciprocated, true
    r = Follow.new :follower => following, :following => follower
    r.reciprocated = true
    r.save
  end
  
  def ignore
    update_attribute :ignored, true
  end
end

who's more foolish? the fool or the fool who follows him?.rb

class Friend < ActiveRecord::Base
  has_many :following_follows, 
    :class_name => 'Follow', 
    :foreign_key => 'follower_id'
  
  has_many :followed_follows, 
    :class_name => 'Follow', 
    :foreign_key => 'following_id'
  
  has_many :followers, 
    :through => :followed_follows
    
  has_many :followings, 
    :through => :following_follows
 
  has_many :friends, 
    :through => :following_follows,
    :source => :following,
    :conditions => {'follows.reciprocated' => true}

  has_many :requests, 
    :through => :followed_follows,
    :source => :following,
    :conditions => {'follows.reciprocated' => false, 'follows.ignored' => false}
    
  has_many :pendings, 
    :through => :following_follows,
    :source => :follower,
    :conditions => {'follows.reciprocated' => false, 'follows.ignored' => false} 
end