在Windows 7上使用WEBrick启动rails服务器时出现以下错误：
C：/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/rubygems_integ
ration.rb：214：在block in replace_gem': Please install the mysql2 adapter:宝石中
安装activerecord-mysql2-adapter`（mysql2不是捆绑包的一部分。添加它
到Gemfile。）（LoadError）
我已经确定database.yml的适配器为mysql2，gemfile列出了mysql2。下面是我的database.yml文件和gem文件
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
宝石文件： 来源'https://rubygems.org'
gem 'rails', '3.2.13'
# Bundle edge Rails instead:
# gem 'rails', :git => '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', '~> 3.2.3'
gem 'coffee-rails', '~> 3.2.1'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', :platforms => :ruby
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
我已尝试在其他具有相同问题的线程中发布的所有各种选项，例如添加gem'mysql2''version no'。它无法解决问题。在发出sql-lite时我也有同样的问题。
感谢您的帮助。提前谢谢。
编辑：当我运行bundle install时，我在窗口中看到以下内容。请注意，mysql2不是使用列表的一部分。这是正常的吗？
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.
编辑在尝试http://www.mohanarun.com/how-to-install-mysql-adapter-ruby-gem-in-windows/的说明后，我看到捆绑安装正在拾取mysql。但是，当我做rails服务器时，我得到以下错误。
/ * * /
之前还有更多错误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 奥勒/ railties / paths.rb 375 C：/Ruby200-x64/lib/ruby/gems/2.0.0/gems/actionpack-3.2.13/lib/action_contr 奥勒/ 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 /班/ delegating_attributes.rb 379 C：/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.13/lib/active_su pport / core_ext /模块/ reachable.rb 380 C：/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.13/lib/active_su pport / core_ext /班/ 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 /阵列/ 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 吨/ 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
[注] 您可能在Ruby解释器或扩展库中遇到了错误。 欢迎提供错误报告。 有关详细信息：bugreport
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答案 0 :(得分：3)
确保将以下内容添加到您的Gemfile：
gem 'mysql'
gem 'mysql2', "~> 0.3.10"
然后运行
bundle install
问题太旧了，但这可能有助于其他人。
答案 1 :(得分：0)
修改Gemfile和bundle install之后，你应该重新启动Rails服务器，它可以重新加载bundle gems
答案 2 :(得分：0)
生产中发生了同样的问题，以下是问题所在。
这些步骤非常适合我的制作设置，但我希望它们对其他人也有帮助。