在rails中連接現有的MySQL數據庫

Question

我想將我的Ruby on Rails應用程序與MySQL數據庫連接，該數據庫是單獨開發的。 對於這種連接，我使用了development環境：

adapter: mysql
username: root  
password: ******  
host: 127.0.0.1
port: 3306   

當我嘗試在Rails中建立MySQL連接時，它顯示：

C:/Ruby193/lib/ruby/gems/1.9.1/gems/mysql-2.9.0-x86-mingw32/lib/mysql.rb:4:in `require': Incorrect MySQL client library version! This gem was compiled for 6.0.0 but the client library is 5.5.9. (RuntimeError)
    from C:/Ruby193/lib/ruby/gems/1.9.1/gems/mysql-2.9.0-x86-mingw32/lib/mysql.rb:4:in `<top (required)>'
    from C:/Ruby193/lib/ruby/gems/1.9.1/gems/bundler-1.2.3/lib/bundler/runtime.rb:68:in `require'
    from C:/Ruby193/lib/ruby/gems/1.9.1/gems/bundler-1.2.3/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
    from C:/Ruby193/lib/ruby/gems/1.9.1/gems/bundler-1.2.3/lib/bundler/runtime.rb:66:in `each'
    from C:/Ruby193/lib/ruby/gems/1.9.1/gems/bundler-1.2.3/lib/bundler/runtime.rb:66:in `block in require'
    from C:/Ruby193/lib/ruby/gems/1.9.1/gems/bundler-1.2.3/lib/bundler/runtime.rb:55:in `each'
    from C:/Ruby193/lib/ruby/gems/1.9.1/gems/bundler-1.2.3/lib/bundler/runtime.rb:55:in `require'
    from C:/Ruby193/lib/ruby/gems/1.9.1/gems/bundler-1.2.3/lib/bundler.rb:128:in `require'
    from D:/registration/config/application.rb:7:in `<top (required)>'
    from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.9/lib/rails/commands.rb:53:in `require'
    from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.9/lib/rails/commands.rb:53:in `block in <top (required)>'
    from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.9/lib/rails/commands.rb:50:in `tap'
    from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.9/lib/rails/commands.rb:50:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'

D:\registration>

此外，當我嘗試我的rake命令時，它顯示：

rake aborted!
Incorrect MySQL client library version! This gem was compiled for 6.0.0 but the client library is 5.5.9.
D:/registration/config/application.rb:7:in `<top (required)>'
D:/registration/Rakefile:5:in `<top (required)>'
(See full trace by running task with --trace)

D:\registration>

我如何連接到我的數據庫？

Answer 1

根據錯誤，您似乎使用的是比MySQL客戶端更新的gem版本。

它說：

• 您的gem已經編譯（使用）我的sql客戶端版本6.0.0。
• 您的實際我的SQL客戶端版本（在您的機器中）是5.5.9。

你可以發布你的MySQL gem版本以及你的MySQL客戶端版本嗎？

將MySQL客戶端升級到版本6.0.0應該可以解決此問題。