我把这个放进去了 app/controllers/sessions_controller.rb .

会话控制器.rb

class SessionsController < ApplicationController

  # Authenticate user against their LDAP directory
  # user and directory correspond to models in my app
  # password is a string
  # For complete source, see http://github.com/sidewaysmilk/auther
  def directory_login(user, password)

    directory = user.directory

    return nil if !directory

    directory.bind_dn['%s'] = user.login

    ldap = Net::LDAP.new
    ldap.host = directory.host
    ldap.port = directory.port
    ldap.encryption :simple_tls if directory.use_simple_tls?
    ldap.auth directory.bind_dn, password
    if ldap.bind
      return user 
    end
  end

end