title: Please install the mysql2 adapter: `gem install activerecord-mysql2-adapter` (mysql2 is not part of the bundle. Add it to Gemfile.) (LoadError)
body: <p>I get the folllowing error when starting my rails server using WEBrick on Windows 7:</p>
  
  <p>C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/rubygems_integ
  ration.rb:214:in <code>block in replace_gem': Please install the mysql2 adapter:</code>gem
   install activerecord-mysql2-adapter` (mysql2 is not part of the bundle. Add it
  to Gemfile.) (LoadError)</p>
  
  <p>I have made sure the database.yml had adapter as mysql2, gemfile lists mysql2. Below is my database.yml file and also gem file </p>
  
  <pre><code>    development:
        adapter: mysql2
        encoding: utf8
        reconnect: false
        database: elearn3_development
        pool: 5
        username: root
        password: password
        host: 127.0.0.1
        port: 3306
  
      test:
        adapter: mysql2
        encoding: utf8
        reconnect: false
        database: elearn3_test
        pool: 5
        username: root
        password: passsword
        host: 127.0.0.1
        port: 3306
  
      production:
        adapter: mysql2
        encoding: utf8
        reconnect: false
        database: elearn3_production
        pool: 5
        username: root
        password: passsword
        host: 127.0.0.1
        port: 3306
  </code></pre>
  
  <p>Gem file:
         source '<a href="https://rubygems.org" rel="nofollow">https://rubygems.org</a>'</p>
  
  <pre><code>gem 'rails', '3.2.13'
  
  # Bundle edge Rails instead:
  # gem 'rails', :git =&gt; 'git://github.com/rails/rails.git'
  
  gem 'mysql2'
  
  
  # Gems used only for assets and not required
  # in production environments by default.
  group :assets do
    gem 'sass-rails',   '~&gt; 3.2.3'
    gem 'coffee-rails', '~&gt; 3.2.1'
  
  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer', :platforms =&gt; :ruby
  
  gem 'uglifier', '&gt;= 1.0.3'
      end
  
  gem 'jquery-rails'
  </code></pre>
  
  <p>I have tried all the various options posted in other threads having the same issue, such as adding gem 'mysql2' 'version no'. It does not resolve the issue. I have the same issue while issuing sql-lite also.</p>
  
  <p>Your help is appreciated. Thanks in advance.</p>
  
  <p>EDIT: When I run bundle install, I get the following in the window. Please observe that mysql2 is not part of the using list. Is that normal?</p>
  
  <pre><code>    Using rake (10.0.4)
  Using i18n (0.6.1)
  Using multi_json (1.7.2)
  Using activesupport (3.2.13)
  Using builder (3.0.4)
  Using activemodel (3.2.13)
  Using erubis (2.7.0)
  Using journey (1.0.4)
  Using rack (1.4.5)
  Using rack-cache (1.2)
  Using rack-test (0.6.2)
  Using hike (1.2.2)
  Using tilt (1.4.0)
  Using sprockets (2.2.2)
  Using actionpack (3.2.13)
  Using mime-types (1.23)
  Using polyglot (0.3.3)
  Using treetop (1.4.12)
  Using mail (2.5.3)
  Using actionmailer (3.2.13)
  Using arel (3.0.2)
  Using tzinfo (0.3.37)
  Using activerecord (3.2.13)
  Using activeresource (3.2.13)
  Using coffee-script-source (1.6.2)
  Using execjs (1.4.0)
  Using coffee-script (2.2.0)
  Using rack-ssl (1.3.3)
  Using json (1.7.7)
  Using rdoc (3.12.2)
  Using thor (0.18.1)
  Using railties (3.2.13)
  Using coffee-rails (3.2.2)
  Using jquery-rails (2.2.1)
  Using bundler (1.3.5)
  Using rails (3.2.13)
  Using sass (3.2.8)
  Using sass-rails (3.2.6)
  Using uglifier (2.0.1)
  Your bundle is complete!
  Use `bundle show [gemname]` to see where a bundled gem is installed.
  </code></pre>
  
  <p><strong>EDIT</strong> After trying the instructions from <a href="http://www.mohanarun.com/how-to-install-mysql-adapter-ruby-gem-in-windows/" rel="nofollow">http://www.mohanarun.com/how-to-install-mysql-adapter-ruby-gem-in-windows/</a>, I see that bundle install is picking up mysql. But, I get the following erros, when I do rails server.</p>
  
  <p>/* many more errors before */</p>
  
  <p>pport/core_ext/load_error.rb
    369 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.13/lib/active_su
  pport/core_ext/name_error.rb
    370 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.13/lib/active_su
  pport/core_ext/uri.rb
    371 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionpack-3.2.13/lib/action_contr
  oller.rb
    372 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionpack-3.2.13/lib/action_view/
  railtie.rb
    373 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionpack-3.2.13/lib/abstract_con
  troller/railties/routes_helpers.rb
    374 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionpack-3.2.13/lib/action_contr
  oller/railties/paths.rb
    375 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionpack-3.2.13/lib/action_contr
  oller/railtie.rb
    376 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activerecord-3.2.13/lib/active_rec
  ord/railtie.rb
    377 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionmailer-3.2.13/lib/action_mai
  ler/version.rb
    378 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.13/lib/active_su
  pport/core_ext/class/delegating_attributes.rb
    379 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.13/lib/active_su
  pport/core_ext/module/reachable.rb
    380 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.13/lib/active_su
  pport/core_ext/class/subclasses.rb
    381 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.13/lib/active_su
  pport/core_ext/class.rb
    382 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.13/lib/active_su
  pport/core_ext/array/uniq_by.rb
    383 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionmailer-3.2.13/lib/action_mai
  ler.rb
    384 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionmailer-3.2.13/lib/action_mai
  ler/railtie.rb
    385 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activeresource-3.2.13/lib/active_r
  esource/exceptions.rb
    386 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activeresource-3.2.13/lib/active_r
  esource/version.rb
    387 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activeresource-3.2.13/lib/active_r
  esource.rb
    388 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activeresource-3.2.13/lib/active_r
  esource/railtie.rb
    389 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.13/lib/rails/test_uni
  t/railtie.rb
    390 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionpack-3.2.13/lib/sprockets/ra
  iltie.rb
    391 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.13/lib/rails/all.rb
    392 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.13/lib/active_su
  pport/string_inquirer.rb
    393 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/mysql2-0.3.11/lib/mysql2/version.r
  b
    394 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/mysql2-0.3.11/lib/mysql2/error.rb
    395 C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/mysql2-0.3.11/lib/mysql2/result.rb</p>
  
  <p>[NOTE]
  You may have encountered a bug in the Ruby interpreter or extension libraries.
  Bug reports are welcome.
  For details: bugreport</p>
  
  <p>This application has requested the Runtime to terminate it in an unusual way.
  Please contact the application's support team for more information.</p>