Rails

ActiveLdap supports Rails 4.0 or later.

Install

To install, simply add the following code to your Gemfile:

gem 'activeldap', :require => 'active_ldap/railtie'

You should also depend on an LDAP adapter such as Net::LDAP or Ruby/LDAP. The following example uses Ruby/LDAP:

gem 'ruby-ldap'

Bundler will install the gems automatically when you run ‘bundle install’.

Configuration

You can use a LDAP configuration per environment. They are in a file named ‘ldap.yml’ in the config directory of your rails app. This file has a similar function to the ‘database.yml’ file that allows you to set your database connection configurations per environment. Similarly, the ldap.yml file allows configurations to be set for development, test, and production environments.

You can generate ‘config/ldap.yml’ by the following command:

% script/rails generate active_ldap:scaffold

You need to modify ‘config/ldap.yml’ generated by active_ldap:scaffold. For instance, the development entry would look something like the following:

development:
  host: 127.0.0.1
  port: 389
  base: dc=localhost
  bind_dn: cn=admin,dc=localhost
  password: secret

When your application starts up, ActiveLdap::Base.setup_connection will be called with the parameters specified for your current environment.

You can replace default orm generators with gems one to skip active_ldap prefix in ‘config/application.rb’:

config.app_generators.orm :active_ldap

Model

You can generate a User model that represents entries under ou=Users by the following command:

% script/rails generate active_ldap:model User --dn-attribute uid --classes person PosixAccount

It generates the following app/model/user.rb:

class User < ActiveLdap::Base
  ldap_mapping :dn_attribute => "uid",
               :prefix => "ou=Users",
               :classes => ["person", "PosixAccount"]
end

You can add relationships by modifying app/model/user.rb:

class User < ActiveLdap::Base
  ldap_mapping :dn_attribute => 'uid',
               :prefix => "ou=Users",
               :classes => ['person', 'posixAccount']
  belongs_to :primary_group,
             :class_name => "Group",
             :foreign_key => "gidNumber",
             :primary_key => "gidNumber"
  belongs_to :groups,
             :many => 'memberUid'
end

You can also generate a Group model by the following command:

% script/rails generate active_ldap:model Group --classes PosixGroup

app/model/group.rb:

class Group < ActiveLdap::Base
  ldap_mapping :dn_attribute => "cn",
               :prefix => "ou=Groups",
               :classes => ["PosixGroup"]
end

You can add relationships by modifying app/model/group.rb:

class Group < ActiveLdap::Base
  ldap_mapping :dn_attribute => "cn",
               :prefix => "ou=Groups",
               :classes => ["PosixGroup"]
  has_many :members,
           :class_name => "User",
           :wrap => "memberUid"
  has_many :primary_members,
           :class_name => "Group",
           :foreign_key => "gidNumber",
           :primary_key => "gidNumber"
end

You can also generate a Ou model by the following command:

% script/rails generate active_ldap:model Ou --prefix '' --classes organizationalUnit

class Ou < ActiveLdap::Base
  ldap_mapping :dn_attribute => "cn",
               :prefix => "",
               :classes => ["organizationalUnit"]
end