$ script/plugin install git:https://github.com/taweili/renren.git

Run the renren generator to create the cross domain scripting bridge to make it possible for your application to communicate with renren and make sure that you have setup your config/renren.yml to match your renren application

$ script/generate renren

For more information on the renren plugin checkout it’s readme github.com/taweili/renren

$ script/plugin install git:https://github.com/flyerhzm/authlogic_renren_connect.git

class AddRenrenConnectFieldsToUsers < ActiveRecord::Migration
  def self.up
    add_column :users, :renren_uid, :integer
    add_column :users, :renren_session_key, :string
  end

  def self.down
    remove_column :users, :renren_session_key
    remove_column :users, :renren_uid
  end
end

<%= xn_connect_javascript_tag %>

<%= authlogic_renren_login_button %>
<%= init_xn_connect %>

If you want to save some user data when connecting to renren you can use the before_connect hook in your user model.

def before_connect(renren_session)
  self.login = renren_session.user.name
  self.active = true
end

For more information about what you can get form the renren_session checkout the renren plugin rdoc.