2011/11/20 Colin Law <[email protected]>:
> On 20 November 2011 11:27, amvis <[email protected]> wrote:
>> Thanks for the reply
>> colin, a simple thing. Now am using rails version is 3.1.1 . i had setup the
>> ruby on rails on my system with
>> RVM( http://ryanbigg.com/2010/12/ubuntu-ruby-rvm-rails-and-you/.) so we have
>> an application which created with rails older version 2.3.6. my question is
>>  now how to run this  older application on my new setup. can u/anyone
>> specify how to rectify this?
>
> Have a look in the rvm documentation about gemsets.  Using a gemset
> you can install rails 2.3.6 and whatever versions of other gems that
> application needs, then the app should run happily.

Also <https://rvm.beginrescueend.com/workflow/rvmrc/#project> could be
a good starting point to handle multiple projects having different
gemsets.

I have an isolated gemset for every single project.

At start of a project I create the project dir and run `rvm use
<rubyversion>@<projectname> --create --rvmrc` go one dir level upwards
do again `rvm use <rubyversion>@<projectname>` then `rails new
<projectname>`

I have to say, that rails 3.1 is in my default gemset, also is bundler.

If I have to use another version of rails I do `gem uninstall rails`
first in the corresponding gemset and then `gem install rails
<version>`. Since I handle my gems with bundler in rails 2.x all other
steps are the same.

Bye
Norbert

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