bf4
commented
10 years ago 
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.
ON RHEL Linux, using rbenv and ruby 2.1.0.
"bundle install" works, but "rake erd" then fails.
bundle install Using i18n (0.6.9) Using minitest (4.7.5) Using multi_json (1.8.4) Using atomic (1.1.14) Using thread_safe (0.1.3) Using tzinfo (0.3.38) Using activesupport (4.0.2) Using builder (3.1.4) Using activemodel (4.0.2) Using activerecord-deprecated_finders (1.0.3) Using arel (4.0.2) Using activerecord (4.0.2) Using choice (0.1.6) Using ruby-graphviz (1.0.9) Using rails-erd (1.1.0) Using bundler (1.5.3) Your bundle is complete! Use
bundle show [gemname]to see where a bundled gem is installed. [art@ip-10-112-49-74 ~]$ 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) /home/art/vendor/rails/activesupport/lib/active_support/dependencies.rb:153:inblock in require' /home/art/vendor/rails/activesupport/lib/active_support/dependencies.rb:521:innew_constants_in' /home/art/vendor/rails/activesupport/lib/active_support/dependencies.rb:153:inrequire' /home/art/vendor/rails/activesupport/lib/active_support/dependencies.rb:153:inblock in require' /home/art/vendor/rails/activesupport/lib/active_support/dependencies.rb:521:innew_constants_in' /home/art/vendor/rails/activesupport/lib/active_support/dependencies.rb:153:inrequire' /home/art/Rakefile:11:in `<top (required)>' (See full trace by running task with --trace)