無法啟動Rails服務器mysql2 gem？

Question

Ruby和rails noob，做了一個項目，到現在為止。 但是現在嘗試運行Rails服務器時遇到了這些錯誤。 我正在使用Windows Vista和ruby 2.0.0。

D:/Ruby200/lib/ruby/gems/2.0.0/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2/mysql2.
rb:2:in `require': cannot load such file -- mysql2/2.0/mysql2 (LoadError)
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/mysql2-0.3.11-x86-mingw32/lib/m
ysql2/mysql2.rb:2:in `<top (required)>'
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/mysql2-0.3.11-x86-mingw32/lib/m
ysql2.rb:9:in `require'
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/mysql2-0.3.11-x86-mingw32/lib/m
ysql2.rb:9:in `<top (required)>'
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/bundler-1.3.4/lib/bundler/runti
me.rb:72:in `require'
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/bundler-1.3.4/lib/bundler/runti
me.rb:72:in `block (2 levels) in require'
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/bundler-1.3.4/lib/bundler/runti
me.rb:70:in `each'
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/bundler-1.3.4/lib/bundler/runti
me.rb:70:in `block in require'
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/bundler-1.3.4/lib/bundler/runti
me.rb:59:in `each'
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/bundler-1.3.4/lib/bundler/runti
me.rb:59:in `require'
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/bundler-1.3.4/lib/bundler.rb:13
2:in `require'
        from D:/wamp/www/simple_cms/config/application.rb:7:in `<top (required)>
'
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-3.2.13/lib/rails/comma
nds.rb:53:in `require'
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-3.2.13/lib/rails/comma
nds.rb:53:in `block in <top (required)>'
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-3.2.13/lib/rails/comma
nds.rb:50:in `tap'
        from D:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-3.2.13/lib/rails/comma
nds.rb:50:in `<top (required)>'
        from script/rails:6:in `require'
        from script/rails:6:in `<main>'

到目前為止，我對紅寶石和gems的了解很少，但是mysql2 gem似乎是一個問題，因為我已經安裝並沒有幫助。 我確實不斷收到一條消息，說明我已經按照要求安裝了二進制版本。 這是好事還是壞事？

任何人都請幫助我，如果您需要更多信息，請告訴我。

Answer 1

我認為這里的答案就是您要尋找的：

stackoverflow.com/a/5368767/1622843

基本上，您需要指向gem才能使用安裝在計算機上的mysql實例。