Używam klejnotu Active Admin do mojej małej aplikacji opartej na Quizie. Ale kiedy wykonamrake db: migracja daje mi błąd. Poniżej znajduje się ślad polecenia:

$ rake db:migrate RAILS_ENV=production --trace
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Invoke db:load_config (first_time)
** Invoke rails_env (first_time)
** Execute rails_env
** Execute db:load_config
** Execute db:migrate
==  DeviseCreateAdminUsers: migrating =========================================
-- create_table(:admin_users)
rake aborted!
An error has occurred, all later migrations canceled:

undefined method `database_authenticatable' for #<ActiveRecord::ConnectionAdapters::TableDefinition:0x9dee690>
/home/users/Documents/Quiz/db/migrate/20120509055635_devise_create_admin_users.rb:4:in `block in change'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/connection_adapters/abstract/schema_statements.rb:160:in `create_table'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/connection_adapters  /abstract_mysql_adapter.rb:432:in `create_table'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:466:in `block in method_missing'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:438:in `block in say_with_time'
/home/users/.rvm/rubies/ruby-1.9.2-p318/lib/ruby/1.9.1/benchmark.rb:295:in `measure'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:438:in `say_with_time'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:458:in `method_missing'
/home/users/Documents/Quiz/db/migrate/20120509055635_devise_create_admin_users.rb:3:in `change'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:407:in `block (2 levels) in migrate'
/home/users/.rvm/rubies/ruby-1.9.2-p318/lib/ruby/1.9.1/benchmark.rb:295:in `measure'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:407:in `block in migrate'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:119:in `with_connection'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:389:in `migrate'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:528:in `migrate'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:720:in `block (2 levels) in migrate'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:777:in `call'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:777:in `ddl_transaction'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:719:in `block in migrate'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:700:in `each'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:700:in `migrate'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:570:in `up'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/migration.rb:551:in `migrate'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/activerecord-3.2.3/lib/active_record/railties/databases.rake:153:in `block (2 levels) in <top (required)>'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
/home/users/.rvm/rubies/ruby-1.9.2-p318/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/home/users/.rvm/gems/ruby-1.9.2-p318/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>'
/home/users/.rvm/gems/ruby-1.9.2-p318/bin/rake:19:in `load'
/home/users/.rvm/gems/ruby-1.9.2-p318/bin/rake:19:in `<main>'
Tasks: TOP => db:migrate

Follwoing to mój GemFile:

source 'https://rubygems.org'

gem 'rails', '3.2.3'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

gem 'mysql2'
gem 'devise'
gem 'activeadmin', :git => 'https://github.com/gregbell/active_admin.git'
gem 'therubyracer'
gem 'formtastic'
gem 'haml'
gem 'paperclip'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer', :platform => :ruby

  gem 'uglifier', '>= 1.0.3'
end

gem 'jquery-rails'

Zadowolony z20120509055635_devise_create_admin_users.rb jest

class DeviseCreateAdminUsers < ActiveRecord::Migration
  def change
    create_table(:admin_users) do |t|
      t.database_authenticatable :null => false
      t.recoverable
      t.rememberable
      t.trackable

      # t.encryptable
      # t.confirmable
      # t.lockable :lock_strategy => :failed_attempts, :unlock_strategy => :both
      # t.token_authenticatable


      t.timestamps
    end

    # Create a default user
    AdminUser.create!(:email => '[email protected]', :password => 'password', :password_confirmation => 'password')

    add_index :admin_users, :email,                :unique => true
    add_index :admin_users, :reset_password_token, :unique => true
    # add_index :admin_users, :confirmation_token,   :unique => true
    # add_index :admin_users, :unlock_token,         :unique => true
    # add_index :admin_users, :authentication_token, :unique => true
  end

end

Szukałem powyższego problemu i dostałemto , ale to mi nie pomogło. Wszędzie znalazłem tylko to rozwiązanie. Czy ktoś wcześniej natknął się na ten problem, jeśli tak, to co zrobiłeś, aby go rozwiązać? Każda pomoc na ten temat zostanie doceniona. Dzięki