why to get the error 'undefined method `write_inheritable_attribute''

rubyonrails-talk
1

I started getting this error message when I attempt to do some rake tasks:

$ rails destroy scaffold genotypes /usr/share/rails-ruby1.8/railties/lib/rails_generator/options.rb:32:in `default_options': undefined method `write_inheritable_attribute' for Rails::Generator::Base:Class (NoMethodError)   from /usr/share/rails-ruby1.8/railties/lib/rails_generator/base.rb:90:in `<class:Base>'   from /usr/share/rails-ruby1.8/railties/lib/rails_generator/base.rb:85:in `<module:Generator>'   from /usr/share/rails-ruby1.8/railties/lib/rails_generator/base.rb:48:in `<module:Rails>'   from /usr/share/rails-ruby1.8/railties/lib/rails_generator/base.rb:6:in `<top (required)>'   from /home/caseyr/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'   from /home/caseyr/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'   from /usr/share/rails-ruby1.8/railties/lib/rails_generator.rb:34:in `<top (required)>'   from /home/caseyr/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'   from /home/caseyr/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'   from /usr/share/rails-ruby1.8/railties/bin/rails:14:in `<main>' $

I found a related old message here that seemed to indicate my problem might be caused because I did not install gems as root, so here is what my gem environment looks like:

$ gem environment RubyGems Environment:   - RUBYGEMS VERSION: 1.8.21   - RUBY VERSION: 1.8.7 (2010-08-16 patchlevel 302) [i486-linux]   - INSTALLATION DIRECTORY: /home/caseyr/.rvm/gems/ruby-1.9.3-p194   - RUBY EXECUTABLE: /usr/bin/ruby1.8   - EXECUTABLE DIRECTORY: /home/caseyr/.rvm/gems/ruby-1.9.3-p194/bin   - RUBYGEMS PLATFORMS:     - ruby     - x86-linux   - GEM PATHS:      - /home/caseyr/.rvm/gems/ruby-1.9.3-p194      - /home/caseyr/.rvm/gems/ruby-1.9.3-p194@global   - GEM CONFIGURATION:      - :update_sources => true      - :verbose => true      - :benchmark => false      - :backtrace => false      - :bulk_threshold => 1000   - REMOTE SOURCES:      - http://rubygems.org/

Can anyone tell if this is incorrect? Do I need to uninstall and reinstall gems?

Any suggestions much appreciated...

--rick

2

I started getting this error message when I attempt to do some rake tasks:

$ rails destroy scaffold genotypes /usr/share/rails-ruby1.8/railties/lib/rails_generator/options.rb:32:in `default_options': undefined method `write_inheritable_attribute' for Rails::Generator::Base:Class (NoMethodError) from /usr/share/rails-ruby1.8/railties/lib/rails_generator/base.rb:90:in `<class:Base>' from /usr/share/rails-ruby1.8/railties/lib/rails_generator/base.rb:85:in `<module:Generator>' from /usr/share/rails-ruby1.8/railties/lib/rails_generator/base.rb:48:in `<module:Rails>' from /usr/share/rails-ruby1.8/railties/lib/rails_generator/base.rb:6:in `<top (required)>' from /home/caseyr/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /home/caseyr/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /usr/share/rails-ruby1.8/railties/lib/rails_generator.rb:34:in `<top (required)>' from /home/caseyr/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /home/caseyr/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /usr/share/rails-ruby1.8/railties/bin/rails:14:in `<main>' $

I found a related old message here that seemed to indicate my problem might be caused because I did not install gems as root, so here is what my gem environment looks like:

If you are using rvm then you should not install gems as root. Does it fix the problem if you do rvm rake whatever

Colin