Installation du plugin :
Sous netbeans : ajouter le repo :
http://actsasnetwork.rubyforge.org/svn/plugins/acts_as_network/

en mode console :
sudo apt-get install git git-core (pour linux)
script/plugin install git://github.com/sjlombardo/acts_as_network.git

générer la doc :
rake doc:plugins

Version simple

Création d'une table des users
script/generate model user


class CreateUsers < ActiveRecord::Migration
  def self.up
    create_table :users do |t|
      t.string   :email
      t.string   :hashed_password
      t.string   :salt
      t.datetime :dateLastLogin
      t.timestamps
    end
  end

  def self.down
    drop_table :users
  end
end


script/generate model friend

class CreateFriends < ActiveRecord::Migration
  def self.up
    create_table :friends, {:id => false} do |t|
      t.column :user_id, :integer, :null => false
      t.column :user_id_target, :integer, :null => false      # target of the relationship
      t.timestamps
    end
  end

  def self.down
    drop_table :friends
  end
end


-> effectuer la migration

Modification des models

class User < ActiveRecord::Base
  acts_as_network :friends, :join_table => :friends
end


Controleur

  def test_acts_as_network
    jane = User.create(:email => 'Jane')
    jack = User.create(:email => 'Jack')

    jane.friends_out << jack                  # Jane adds Jack as a friend
    puts jane.friends.include?(jack)               # true Jack is Janes friend
    puts jack.friends.include?(jane)               # true Jane is also Jack's friend!
  end



Version avec invitations :


Création d'une table des users
script/generate model user


class CreateUsers < ActiveRecord::Migration
  def self.up
    create_table :users do |t|
      t.string   :email
      t.string   :hashed_password
      t.string   :salt
      t.datetime :dateLastLogin
      t.timestamps
    end
  end

  def self.down
    drop_table :users
  end
end


script/generate model invite

class CreateInvites < ActiveRecord::Migration
  def self.up
    create_table :invites do |t|
      t.column :user_id, :integer, :null => false           # source of the relationship
      t.column :user_id_target, :integer, :null => false    # target of the relationship
      t.column :code, :string                                 # random invitation code
      t.column :message, :text                                # invitation message
      t.column :is_accepted, :boolean
      t.column :accepted_at, :timestamp                       # when did they accept?
      t.timestamps
    end
  end

  def self.down
    drop_table :invites
  end
end



Modification des models

class User < ActiveRecord::Base
  acts_as_network :friends, :through => :invites, :conditions => "is_accepted = 1"
end

class Invite < ActiveRecord::Base
  belongs_to :user
  belongs_to :user_target, :class_name => 'User', :foreign_key => 'user_id_target'        # the target of the friend relationship
  validates_presence_of :user, :user_target
end


Controleur :

  def test_acts_as_network
    jane = User.create(:email => 'Jane')
    jack = User.create(:email => 'Jack')

    invite = Invite.create(:user => jane, :user_target => jack, :message => "let's be friends!")

    puts jane.friends.include?(jack)
    puts jack.friends.include?(jane)

    invite.is_accepted = true  # Now Jack accepts the invite
    invite.accepted_at = Time.now
    invite.save and jane.reload and jack.reload

    puts jane.friends.include?(jack)
    puts jack.friends.include?(jane)


  end