From: David Vallner <david@...>
Date: 2006-12-05T07:34:24+09:00
Subject: Re: specifying a gem version

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Brian Mr. wrote:
> I'm new to ruby so I have no clue what I'm doing yet here.  I downloade=
d
> active_merchant code and attempted to run some tests using
> active_support 1.3.1.  That work just fine for me.  I upgraded rails to=

> 1.2rc1 and it then downloaded active_support 1.3.1.5618.  When I attemp=
t
> to run the same tests now with active_support I'm getting an error
> because of the new version of active support.  I was thinking I could
> just specify the older version of active_support and all would be well
> but that doesn't seem to be working.  Instead of doing:
>=20
> begin
>   require 'active_support'
> rescue LoadError
>   require 'rubygems'
>   require_gem 'activesupport'
> end
>=20
> I changed this to:
>=20
> begin
>   require 'rubygems'
>   require_gem 'activesupport', '<=3D1.3.1'
> rescue LoadError
>   require 'rubygems'
>   require_gem 'activesupport'
> end
>=20
> I also tried just putting in require_gem 'activesupport', '1.3.1' with
> no luck.  The error I get is something like 'mattr_accessor' is
> undefined.  I've read that you can specify the version of a gem so I
> must be doing something stupid here.  I have put in a ticket on the
> rails list about this issue with activesupport but I was hoping to work=

> around the issue til it was fixed.  Thanks in advance.
>=20

Do you -need- the newer version of AS or are you just chasing higher
version numbers? Or did rails pick up the incompatible version as a
dependency?

If the former is the case, wipe clean, and just use the version rails
asks for. If the latter, if that's somehow Rails-specific code, maybe
the activesupport gem was already loaded at the bad version before by
the test launcher, I don't think different gem versions can at all run
side-by-side.

David Vallner


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