From: Owein Herrmann <oherrmann@...>
Date: 2008-10-16T01:16:12+09:00
Subject: Re: Using DBI and MySQL gems

Erik Hollensbe wrote:
> 
> Unless rubygems has (recently) changed, the 'gem' command doesn't issue 
> any requires, it just modifies the load path to point at your gem.
> 
> I don't know if this is recommended usage anymore, but provided you 
> haven't installed dbi with the provided setup.rb, "require 'dbi'" should 
> work without the gem statements.
> 
> -Erik

Hmmmm... that definitely does not work. When I say "require 'dbi'" it 
returns true, but then dbh = DBI.connect('DBI:Mysql:money', 'mysqluser', 
'pass3') causes an exception about DBI not being defined... I'm not on 
my ruby box right now, so I cannot give the exact notation... basically, 
what I show above works, the two gem commands and then the require.

In the pickaxe, pg 221 (2nd ed) it says I need to say

require 'rubygems'
require_gem '<gem_name>'

but rubygems appears to be required automatically when I start up, and 
require_gem says that I should use 'gem' instead. So, if require 
'rubygems' is not required (haha) and "require_gem" is just "gem", I'm 
back to my original question, should I not be able to just say

gem 'dbi'

and, incidently, if I installed dbi using the gem installer, and you say 
I should be able to "require 'dbi'" without the gem statements, why does 
that not work? Do I have to do something special to get things that were 
loaded as gems to be recognized differently than what I do for regular 
packages?
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