如何正确安装Ruby的DBI gem，以便它可以与MySql对话？ [英] How do I get Ruby's DBI gem properly installed so that it can talk to MySql?

问题描述

在Windows 7上，我已经安装了Ruby 1.9.2，并安装了以下gem：

On my Windows 7 box, I've installed Ruby 1.9.2, and installed the following gems:

*本地宝石*

• dbd-mysql（0.4.4）


• dbi（0.4.5）


• 已弃用（2.0.1）


• httparty（0.8.1）


• ruby​​gems-update（1.8.15）

• dbd-mysql (0.4.4)
• dbi (0.4.5)
• deprecated (2.0.1)
• httparty (0.8.1)
• rubygems-update (1.8.15)

（我使用gem install做到了）。

(I did this using gem install).

我也编写了以下简单的测试工具：

I have also written the following simple test harness:

require 'rubygems'
require 'dbi'

begin
    dbh = DBI.connect("DBI:Mysql:test", "username", "pwd")

    row = dbh.select_one("SELECT VERSION()")
    puts "Server Version: "+row[0]
rescue DBI::DatabaseError => e
    puts "An error occurred"
    puts "Error code: #{e.err}"
    puts "Error message: #{e.errstr}"
ensure
    # disconnect from server
    dbh.disconnect if dbh
end

断开连接关于如何指定连接字符串的说明，我不断得到：

Regardless of how I specify the connection string, I keep getting:

C:\Code\Concordance.SE>ruby test_sql.rb
C:/Tools/Ruby192/lib/ruby/gems/1.9.1/gems/dbi-0.4.5/lib/dbi.rb:300:in `block in
load_driver': Unable to load driver 'Mysql' (underlying error: uninitialized con
stant DBI::DBD::Mysql) (DBI::InterfaceError)
        from C:/Tools/Ruby192/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'

        from C:/Tools/Ruby192/lib/ruby/gems/1.9.1/gems/dbi-0.4.5/lib/dbi.rb:242:
in `load_driver'
        from C:/Tools/Ruby192/lib/ruby/gems/1.9.1/gems/dbi-0.4.5/lib/dbi.rb:160:
in `_get_full_driver'
        from C:/Tools/Ruby192/lib/ruby/gems/1.9.1/gems/dbi-0.4.5/lib/dbi.rb:145:
in `connect'
        from test_sql.rb:4:in `<main>'

}

我在做什么错了？

推荐答案

找到了在此问题。

在64位操作系统上运行Ruby时，需要将新版本的libMySql.dll复制到Ruby\bin目录中。该dll的最佳来源是此处。

When you are running Ruby on a 64 bit operating system, you need to copy a new version of libMySql.dll into the Ruby\bin directory. The best source for that dll is here.

这篇关于如何正确安装Ruby的DBI gem，以便它可以与MySql对话？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！