From: Brian Candler <b.candler@...>
Date: 2010-08-17T18:59:17+09:00
Subject: Re: Intstalled Ruby 1.8.7 but still getting ruby -v => 1.8.6

Mitchell Gould wrote:
> I have followed the instructions to install ruby 1.8.7.

Which instructions? What did you do? On what platform? The question 
as-is is missing important information.

> However when I run the command
> 
> ruby -v
> 
> I get
> 
> ruby 1.8.6 (2009-06-08 patchlevel 369) [universal-darwin9.0]

Then I can guess you're on a Mac, at least.

> Why is that?

"which ruby" will tell you where it found it. Presumably your other 
installation is either not in $PATH or is later in $PATH; or it was 
installed under a different name (e.g. "ruby187" instead of "ruby").

> Also do I have to tell my Rails application to use 1.8.7 and if so how
> do I do this?

You will probably need to reinstall all your gems, including rails, 
using 1.8.7 so they will go in 1.8.7's gems directory. If you build ruby 
from source, then you will likely need to build rubygems itself from 
source first.

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