Trying (and failing) to load specific version of gem

Ruby
1

I wonder if someone can help with a problem which I’m sure is very
simple
and obvious, but I’m tearing my hair out.

I have rubygems 1.0.1 installed. I have two gems of ActiveRecord
installed
(1.15.3 and 2.0.2). I simply want a program to run using 1.15.3.

Here are the different ways I’ve tried to do it, all of which fail with
the
exceptions shown:

require 'rubygems'
gem 'activerecord', '=1.15.3'
ActiveRecord  # >> uninitialized constant ActiveRecord

require 'rubygems'
gem 'activerecord', '=1.15.3'
require 'activerecord'  # >>  can't activate activerecord (= 2.0.2),

already activated activerecord-1.15.3]

require 'rubygems'
require_gem 'activerecord', '=1.15.3'  # >> undefined method

require_gem

require 'rubygems'
require 'activerecord', '=1.15.3'  # >> wrong number of arguments (2

for 1)

require 'rubygems'
require 'gemconfigure'
Gem.configure([['activerecord','=1.15.3']])
ActiveRecord  # >> uninitialized constant ActiveRecord

require 'rubygems'
require 'gemconfigure'
Gem.configure([['activerecord','=1.15.3']])
require 'activerecord'  # >> can't activate activerecord (= 2.0.2),

already activated activerecord-1.15.3]

I see that rubygems-1.1.0 and 1.1.1 have now been released, but see
nothing
in the changelogs which suggest that this was a known or fixed issue.
Equally, this is such core behaviour that it can’t be broken, or someone
else would have noticed, so I’m sure I’m simply doing it wrong.

Could someone enlighten me please? I am failing to get it to DWIM :slight_smile:

Thanks,

Brian.

2

On Fri, Apr 11, 2008 at 1:18 PM, Brian C. [email protected]
wrote:

gem 'activerecord', '=1.15.3'
require 'activerecord', '=1.15.3'  # >> wrong number of arguments (2 for 1)

I see that rubygems-1.1.0 and 1.1.1 have now been released, but see nothing
in the changelogs which suggest that this was a known or fixed issue.
Equally, this is such core behaviour that it can’t be broken, or someone
else would have noticed, so I’m sure I’m simply doing it wrong.

Could someone enlighten me please? I am failing to get it to DWIM :slight_smile:

Thanks,

Brian.

http://rubyforge.org/tracker/index.php?func=detail&aid=16739&group_id=126&atid=575

3

http://rubyforge.org/tracker/index.php?func=detail&aid=16739&group_id=126&atid=575

Thanks for the quick response. So the magic incantation is:

require ‘rubygems’
gem ‘activerecord’, ‘=1.15.3’
require ‘active_record’
ActiveRecord # >> works!

Cheers,

Brian.