ERROR: 'rake/rdoctask' is obsolete and no longer supported. Use 'rdoc/task' (available in RDoc 2.4.2+) instead

Question

Seems the last post for this problem was closed for one reason or another so I\'ll try my luck...

I\'m trying to run a simple \"rake db:migrate\" command. When I do,

Answer 1

This probably isn't the right way to do this, but I went into my Gemfile.lock file and changed my rake version back from 10.0.3 to 0.8.7. I'm running Rails 3.0.5 right now, and had updated briefly to 3.0.19 before reverting back. I believe that updated some gems and also made it so that the Rails gem was looking for the newest version greater than or equal to 0.8.7:

rails (3.0.5)
  actionmailer (= 3.0.5)
  actionpack (= 3.0.5)
  activerecord (= 3.0.5)
  activeresource (= 3.0.5)
  activesupport (= 3.0.5)
  bundler (~> 1.0)
  railties (= 3.0.5)
railties (3.0.5)
  actionpack (= 3.0.5)
  activesupport (= 3.0.5)
  rake (>= 0.8.7)
  thor (~> 0.14.4)
rake (0.8.7)

I also uninstalled 10.0.3:

gem uninstall rake --version 10.0.3

After that, everything is back to running as it should.

If I didn't roll back rails 3.0.19, then I would have kept using rake 10.0.3.

Hope this helps someone!