gistfile1.rb

class GoodFollower

  def self.connect(&block)
    begin
      temporarily_connect_to_follower
      yield
    ensure
      restore_connection_to_leader
    end
  end

private

  def self.follower_url
    ENV['HEROKU_POSTGRESQL_PURPLE_URL']
  end

  def self.leader_url
    ENV['HEROKU_POSTGRESQL_ONYX_URL']
  end

  def self.temporarily_connect_to_follower
    ActiveRecord::Base.establish_connection(follower_url)
  end

  def self.restore_connection_to_leader
    ActiveRecord::Base.establish_connection(leader_url)
  end

end