在 Windows 上启动 Ruby 服务器时出错

Question

我得到的错误如下：

C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/mysql2-0.3.18-x64-mingw32/lib/m ysql2/mysql2.rb:2:in require': 无法加载此类文件 -- mysql2/2.2/my sql2（加载错误） 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/mysql2-0.3.18-x64- mingw32/lib/mysql2/mysql2.rb:2:in ' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/mysql2-0.3.18-x64- mingw32/lib/mysql2.rb:31:in 要求' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/mysql2-0.3.18-x64- mingw32/lib/mysql2.rb:31:in ' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.9.1/lib/ 捆绑器/runtime.rb:76:in 要求' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.9.1/lib/ bundler/runtime.rb:76:in block (2 级别) in require' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.9.1/lib/ bundler/runtime.rb:72:in each' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.9.1/lib/ bundler/runtime.rb:72:in 块中的要求' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.9.1/lib/ bundler/runtime.rb:61:in each' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.9.1/lib/ 捆绑器/runtime.rb:61:in 要求' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.9.1/lib/ bundler.rb:134:in 要求' 来自 D:/xampp/htdocs/RubyCms/config/application.rb:7:in ' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.1/lib /rails/commands/commands_tasks.rb:78:in 要求' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.1/lib /rails/commands/commands_tasks.rb:78:in block in server' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.1/lib /rails/commands/commands_tasks.rb:75:in tap' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.1/lib /rails/commands/commands_tasks.rb:75:in server' 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.1/lib /rails/commands/commands_tasks.rb:39:in run_command！ 来自 C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.1/lib /rails/commands.rb:17:in ' 从 bin/rails:4:in 要求' 从 bin/rails:4:in '

我真的不知道怎么了。

非常感谢任何帮助。

Answer 1

当我不小心使用默认数据库 (sqlite3) 创建了一个新的 Rails 应用程序但实际上安装了 mysql2 时，我遇到了同样的错误。

检查您安装的数据库以及 gemfile 中需要哪个数据库。