Rake aborted! uninitialized constant Object::Bundler

Zielona szkoła
1

mam taki problem:

wpisujęrake db:migrate
i wyświetla mi(in /home/tichy/prog/rails/demo_app) rake aborted! uninitialized constant Object::Bundler /usr/local/lib/ruby/1.9.1/rake.rb:2482:in `const_missing' /home/tichy/prog/rails/demo_app/config/boot.rb:9:in `rescue in <top (required)>' /home/tichy/prog/rails/demo_app/config/boot.rb:5:in `<top (required)>' <internal:lib/rubygems/custom_require>:29:in `require' <internal:lib/rubygems/custom_require>:29:in `require' /home/tichy/prog/rails/demo_app/config/application.rb:1:in `<top (required)>' <internal:lib/rubygems/custom_require>:29:in `require' <internal:lib/rubygems/custom_require>:29:in `require' /home/tichy/prog/rails/demo_app/Rakefile:4:in `<top (required)>' /usr/local/lib/ruby/1.9.1/rake.rb:2373:in `load' /usr/local/lib/ruby/1.9.1/rake.rb:2373:in `raw_load_rakefile' /usr/local/lib/ruby/1.9.1/rake.rb:2007:in `block in load_rakefile' /usr/local/lib/ruby/1.9.1/rake.rb:2058:in `standard_exception_handling' /usr/local/lib/ruby/1.9.1/rake.rb:2006:in `load_rakefile' /usr/local/lib/ruby/1.9.1/rake.rb:1991:in `run' /usr/local/bin/rake:31:in `<main>'

2

gem install bundler

edit: aha, no i nie wiem czy Railsy 3 działają dobrze z Ruby 1.9.1, jeszcze jakiś czas temu były segfaulty. Polecali 1.9.2 albo 1.8.7.

3

próbowałemSuccessfully installed bundler-1.0.0 1 gem installed Installing ri documentation for bundler-1.0.0... Installing RDoc documentation for bundler-1.0.0..
i dalej nie działa