Unable to activate ... activerecord-2.2.2 conflicts with activerecord (>= 3.0) about rails-erd

[lmorris99]

I ran "gem install activerecord -v 2.2.2". It successfully installed 2.2.2.
but I still get
$ rake erd
rake aborted!
Unable to activate rails-erd-1.1.0, because activesupport-2.2.2 conflicts with activesupport (>= 3.0), activerecord-2.2.2 conflicts with activerecord (>= 3.0)

About to give up after two full days trying things. The fault, I guess, is not with Rails-erd specifically. It's that Rails or Gems updates are generally not backward compatible. But any advice would be appreciated before I walk away from what looks like a very useful tool.

[kerrizor]

From a distance, this looks like an issue with attempting to use this on Rails 4? Its pretty weird, to be sure.. Another thing I'm noticing here is that you're attempting to use rake erd however you should be able to use bundle exec erd (or erd depending on how you've installed the gem) Is this still an issue for you?

[kerrizor]

Thanks to @a2ikm in #120 we now have Rails 4.x support. Thank you for the heavy lifting!