DBI :: InterfaceError：無法加載驅動程序（未初始化常量了MySqlError）

我已經包括寶石，DBI :: InterfaceError：無法加載驅動程序（未初始化常量了MySqlError）

dbd-mysql (0.4.4) 
dbi (0.4.5) 
mysql (2.8.1)

當我運行下面的代碼軌控制檯上，

require 'rubygems' 
require "dbi" 
require 'dbd-mysql' 
dbh = DBI.connect("DBI:Mysql:TestDB:localhost","username", "pwd") 

1.9.2-p180 :001 > require 'rubygems' 
=> false 
1.9.2-p180 :002 > require "dbi" 
=> false 
1.9.2p180 :003 > require 'dbd-mysql' 
LoadError: no such file to load -- dbd-mysql 
from /.rvm/gems/[email protected]/gems/dbi-0.4.5/lib/dbi.rb:318:in `rescue in load_driver' 
    from /.rvm/gems/[email protected]/gems/dbi-0.4.5/lib/dbi.rb:242:in `load_driver' 
    from /.rvm/gems/[email protected]/gems/dbi-0.4.5/lib/dbi.rb:160:in `_get_full_driver' 
    from /.rvm/gems/[email protected]/gems/dbi-0.4.5/lib/dbi.rb:145:in `connect' 
    from (irb):3 
    from /.rvm/gems/[email protected]/gems/railties-3.1.1/lib/rails/commands/console.rb:45:in `start' 
    from /.rvm/gems/[email protected]/gems/railties-3.1.1/lib/rails/commands/console.rb:8:in `start' 
    from /.rvm/gems/[email protected]/gems/railties-3.1.1/lib/rails/commands.rb:40:in `<top (required)>' 
    from script/rails:6:in `require' 
    from script/rails:6:in `<main>' 

1.9.2-p180 :004 > dbh = DBI.connect("DBI:Mysql:TestDB:localhost","username", "pwd") 
DBI::InterfaceError: Could not load driver (uninitialized constant MysqlError) 
    from /.rvm/gems/[email protected]/gems/dbi-0.4.5/lib/dbi.rb:318:in `rescue in load_driver' 
    from /.rvm/gems/[email protected]/gems/dbi-0.4.5/lib/dbi.rb:242:in `load_driver' 
    from /.rvm/gems/[email protected]/gems/dbi-0.4.5/lib/dbi.rb:160:in `_get_full_driver' 
    from /.rvm/gems/[email protected]/gems/dbi-0.4.5/lib/dbi.rb:145:in `connect' 
    from (irb):3 
    from /.rvm/gems/[email protected]/gems/railties-3.1.1/lib/rails/commands/console.rb:45:in `start' 
    from /.rvm/gems/[email protected]/gems/railties-3.1.1/lib/rails/commands/console.rb:8:in `start' 
    from /.rvm/gems/[email protected]/gems/railties-3.1.1/lib/rails/commands.rb:40:in `<top (required)>' 
    from script/rails:6:in `require' 
    from script/rails:6:in `<main>' 
1.9.2-p180 :004 >

正在此錯誤

LoadError: no such file to load -- dbd-mysql 
DBI::InterfaceError: Could not load driver (uninitialized constant MysqlError)

是我的dbd-mysql gem安裝不正確？請有人建議我如何解決這個問題？

來源

2013-04-16 Ashwini

你需要'需要「mysql'' ？ –

其實我對這個很陌生，所以只關注博客。因爲他們也需要mysql。所以不確定是否需要 – Ashwini

如果我是你，我會創建

rails new ProjectName -d mysql

一個全新的應用程序，然後我會指定DB名稱在配置/ database.yml中

來源

2013-06-11 21:25:38

DBI :: InterfaceError：無法加載驅動程序（未初始化常量了MySqlError）

回答

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