Question

Following the README documentation, I installed Devise into an existing Rails 3 application. However, it doesn’t seem to work. When I try to access one of my controllers that have before_filter :authenticate_application_user!, I get the following error message:

undefined method 'new_application_user_session_path' for #<Devise::FailureApp::0x60aldc0>

I have no idea why. I’ve checked numerous to see if I followed the installation guide correctly, to no avail. So I’m wondering if anyone cold help me out.

Here is my routes.rb

AwesomeApp::Application.routes.draw do

  devise_for :application_users

  root :to => "home#index"  

  scope "admin" do
    resources :application_users, :path => "users"    
  end
end

Here is my Gemfile:

source 'http://rubygems.org'

gem 'rails', '3.0.0'

gem 'ruby-oci8'
gem 'activerecord-oracle_enhanced-adapter'
gem 'warbler'

gem 'devise', '1.1.3'

group :development, :test do
  gem 'factory_girl_rails'
  gem 'forgery'
end

Here is my migration file for updating my existing database schema:

class DeviseCreateApplicationUsers < ActiveRecord::Migration
  def self.up
    change_table(:application_users) do |t|
      t.rememberable
      t.trackable
    end

  end

  def self.down
    change_table(:application_users) do |t|
      t.remove :rememberable, :trackable
    end
  end
end

NOTE: In case anyone is wondering, I will be authenticating using LDAP. So that’s why you don’t see t.database_authenticatable

Here is my model application_user.rb:

class ApplicationUser < AbstractModel

  devise :rememberable, :trackable, :timeoutable  

end

Here is my devise.rb initializer file:

Devise.setup do |config|
  config.mailer_sender = "[e-mail]"
  require 'devise/orm/active_record'
  config.authentication_keys = [ :user_ldap_id ]
  config.stretches = 10
  config.encryptor = :bcrypt
  config.pepper = "SALT AND PEPPERS HERE, SALT SALT SALT"
end

NOTE: Because I will be authenticating against LDAP, I am using a different column other than the default email column that Devise defaults to. As a result, I had to install the Devise views (rails g devise:views) and modify the app/views/devise/session/new.html.erb file to use user_ldap_id instead of email.

NOTE: I removed any irrelevant code from these snippets.

Answer 1

The problem was because I did not have the database_authenticable enabled in my model. Without that, no routes will be generated. But because I don’t need it, there was no point. However, to resolve this issue, I had to install Devise LDAP Authenticatable and enabled it in my model. Once I did that and restarted the server, the route became accessible.

Take a look at this ticket I created on the Devise Github repo. Someone there was able to walk me through the entire thing. Quite impressed actually at how responsive they were.

https://github.com/plataformatec/devise/issues/issue/614/#comment_517418

Added the following to my Gemfile:

gem 'devise_ldap_authenticatable'

Added the following to my application_users.rb:

devise :ldap_authenticatable