Can I install ruby gems for a specific ruby version?

Question

I'm trying to install rubygem - mongo_mapper, but it fails because activesupport gem requires ruby version higher/equal to 1.9.3.

My question is - Is there a way to install mongo_mapper gem that knows what ruby version i'm running therefore installing all the compatible gems required in the mongo_mapper installation?

The error I'm getting is :

gem install mongo_mapper

ERROR:  Error installing mongo_mapper:
        activesupport requires Ruby version >= 1.9.3.

I've tried installing different versions of activesupport, and other gems mongo_mapper needs but I don't think that's the right (and easy) way to go.

Thanks!

Answer 1

The issue is not ActiveSupport, it's the Ruby version. What version of Ruby are you running? You should probably be using 2.0 or later.