RubyonRails应用程序赢得了'；由于mysql出错，无法运行

我使用Ubuntu终端的命令创建了一个新的Rails应用程序： rails新测试-d mysql

然后我在database.yml文件中添加了根密码

当我运行命令rails server在服务器上运行应用程序时，会发生以下情况：

=> Booting WEBrick
=> Rails 3.2.13 application starting in`enter code here` development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
/home/russian/.rvm/gems/ruby-1.9.3-p392/gems/mysql2-0.3.11/lib/mysql2/client.rb:44:in `connect': Unknown database 'testing_development' (Mysql2::Error)
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/mysql2-0.3.11/lib/mysql2/client.rb:44:in `initialize'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/connection_adapters/mysql2_adapter.rb:16:in `new'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/connection_adapters/mysql2_adapter.rb:16:in `mysql2_connection'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:315:in `new_connection'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:325:in `checkout_new_connection'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:247:in `block (2 levels) in checkout'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `loop'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `block in checkout'
    from /home/russian/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:239:in `checkout'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:102:in `block in connection'
    from /home/russian/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:101:in `connection'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_pool.rb:410:in `retrieve_connection'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:171:in `retrieve_connection'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract/connection_specification.rb:145:in `connection'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/railtie.rb:88:in `block in <class:Railtie>'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:30:in `instance_exec'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:30:in `run'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:55:in `block in run_initializers'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:54:in `each'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:54:in `run_initializers'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392`enter code here`/gems/railties-3.2.13/lib/rails/application.rb:136:in `initialize!'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/railtie/configurable.rb:30:in `method_missing'
    from /home/russian/testing/config/environment.rb:5:in `<top (required)>'
    from /home/russian/testing/config.ru:3:in `require'
    from /home/russian/testing/config.ru:3:in `block in <main>'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize'
    from /home/russian/testing/config.ru:in `new'
    from /home/russian/testing/config.ru:in `<main>'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/builder.rb:40:in `eval'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/builder.rb:40:in `parse_file'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/server.rb:200:in `app'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands/server.rb:46:in `app'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/server.rb:304:in `wrapped_app'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/server.rb:254:in `start'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands/server.rb:70:in `start'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands.rb:55:in `block in <top (required)>'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands.rb:50:in `tap'
    from /home/russian/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands.rb:50:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'

 Can anyone help me with the problem?

=>启动WEBrick
=>Rails 3.2.13应用程序从“在此处输入代码”开始开发http://0.0.0.0:3000
=>使用-d调用以分离
=>Ctrl-C关闭服务器
退出
/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/mysql2-0.3.11/lib/mysql2/client.rb:44:在“连接”中：未知数据库“测试开发”（mysql2:：错误）
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/mysql2-0.3.11/lib/mysql2/client.rb:44:在“初始化”中
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/mysql2\u adapter.rb:16:in'new'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/mysql2\u adapter.rb:16:in`mysql2\u connection'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u pool.rb:315:in“new\u connection”
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u pool.rb:325:在“签出新连接”中
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u pool.rb:247:在“签出中的块（2级）”中
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u pool.rb:242:in'loop'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u pool.rb:242:“签出中的块”中
from/home/russic/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/monitor.rb:211:in'mon_synchronize'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u pool.rb:239:在“签出”中
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u pool.rb:102:“连接中的块”中
from/home/russic/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/monitor.rb:211:in'mon_synchronize'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u pool.rb:101:在“连接”中
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u pool.rb:410:在“检索连接”中
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u specification.rb:171:在“检索连接”中
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active\u record/connection\u adapters/abstract/connection\u specification.rb:145:在“connection”中
from/home/russian/.rvm/gems/ruby-1.9.3-p392/gems/activerecord-3.2.13/lib/active_record/railtie.rb:88:in'block in'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:30:in'instance_exec'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:30:in'run'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:55:“运行中的块初始化器”
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:54:in'each'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/initializable.rb:54:in'run_initializers'
从/home/russic/.rvm/gems/ruby-1.9.3-p392`在此处输入代码`/gems/railties-3.2.13/lib/rails/application.rb:136:in`initialize！'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/railtie/configurable.rb:30:in'method_missing'
from/home/russic/testing/config/environment.rb:5:in`'
from/home/russic/testing/config.ru:3:in'require'
from/home/russic/testing/config.ru:3:in'block in'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/builder.rb:51:在“实例评估”中
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/builder.rb:51:在“初始化”中
from/home/russic/testing/config.ru:in'new'
from/home/russic/testing/config.ru:in`'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/builder.rb:40:in'eval'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/builder.rb:40:in“parse_文件”
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/server.rb:200:在“应用程序”中
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands/server.rb:46:in'app'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/server.rb:304:in'wrapped_app'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/rack-1.4.5/lib/rack/server.rb:254:在“开始”中
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands/server.rb:70:in'start'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands.rb:55:in'block in'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands.rb:50:in'tap'
from/home/russic/.rvm/gems/ruby-1.9.3-p392/gems/railties-3.2.13/lib/rails/commands.rb:50:in`'
来自脚本/rails:6:in'require'
来自脚本/rails:6:in`'
有人能帮我解决这个问题吗？

您必须首先创建数据库

谢谢你的帮助。我使用rakedb:create创建数据库，应用程序运行良好