версия mysql2 (0.3.2) больше не поставляется с адаптером ActiveRecord в комплекте, так как теперь она является частью Rails 3.1

Привет, я использую rails версии 3.0.7, когда запускаю rails generate model имя задачи: строка, я получаю следующее предупреждение

WARNING: This version of mysql2 (0.3.2) doesn't ship with the ActiveRecord adapter bundled anymore as it's now part of Rails 3.1
WARNING: Please use the 0.2.x releases if you plan on using it in Rails <= 3.0.x
/usr/lib/ruby/gems/1.8/gems/activerecord-3.0.7/lib/active_record/connection_adapters/abstract/connection_specification.rb:71:in `establish_connection': Please install the mysql2 adapter: `gem install activerecord-mysql2-adapter` (no such file to load -- active_record/connection_adapters/mysql2_adapter) (RuntimeError)
    from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.7/lib/active_record/connection_adapters/abstract/connection_specification.rb:60:in `establish_connection'
    from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.7/lib/active_record/connection_adapters/abstract/connection_specification.rb:55:in `establish_connection'
    from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.7/lib/active_record/railtie.rb:59
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.7/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.7/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.7/lib/active_support/lazy_load_hooks.rb:43:in `run_load_hooks'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.7/lib/active_support/lazy_load_hooks.rb:42:in `each'
    from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.7/lib/active_support/lazy_load_hooks.rb:42:in `run_load_hooks'
    from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.7/lib/active_record/base.rb:1904
    from /home/sun/railsapp/dog/vendor/plugins/attribute_fu/init.rb:1
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/plugin.rb:81
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `instance_exec'
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:25:in `run'
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:50:in `run_initializers'
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `each'
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/initializable.rb:49:in `run_initializers'
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/application.rb:134:in `initialize!'
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/application.rb:77:in `send'
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/application.rb:77:in `method_missing'
    from /home/sun/railsapp/dog/config/environment.rb:5
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/application.rb:103:in `require'
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/application.rb:103:in `require_environment!'
    from /usr/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/commands.rb:16
    from script/rails:6:in `require'
    from script/rails:6

, когда я пытаюсь установить activerecord-mysql2-adapter с помощью: ОШИБКА: не удалось найти действующий гем 'activerecord-mysql2-adapter' (> = 0) ни в одном репозитории

, пожалуйста, помогите мне спасибо