title: version of mysql2 (0.3.2) doesn't ship with the ActiveRecord adapter bundled anymore as it's now part of Rails 3.1
body: <p>Hi i am using rails version 3.0.7 when i run  rails generate model task name:string i m getting following warning</p>
  
  <pre><code>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 &lt;= 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
  </code></pre>
  
  <p>when i try to install activerecord-mysql2-adapter by :gem install activerecord-mysql2-adapter
  ERROR:  Could not find a valid gem 'activerecord-mysql2-adapter' (>= 0) in any repository</p>
  
  <p>please help me
  thanks </p>