Accessing Rails documentation via ri when multiple versions are installed

On my development system I have multiple versions of Rails installed using the gem tool. The problem is that if I want to access documentation of Rails now using ri that multiple versions of the same class/methods are appearing and there does not seem to be a way to select the appropriate version or set a default doc.

This is especially annoying when used in combination with Textmate's CTRL-H functionality. In textmate, when multiple matches are found by ri, these matches are displayed by Textmate as links such that you can chose the right match. Unfortunately, when these matches have identical class/method names (because they appear in different versions) clicking any link does nothing.

Is there a way to make this work (preferably without having to uninstall older gem versions)?

Thank you.