ruby rvm rails generate scaffold fails

Question

I have this following Gemfile:

source 'https://rubygems.org'

gem 'rails', '3.2.1'

group :assets do
    gem 'sass-rails', '~> 3.2.3'
    gem 'coffee-rails', '~> 3.2.1'
    gem 'uglifier', '>= 1.0.3'
end

gem 'jquery-rails'

Running rvm version:

$ rvm --version

rvm 1.10.2 by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.beginrescueend.com/]

The generate scaffold fails with:

$ rvm all do rails generate scaffold User name:string email:string
(in /home/user/.rvm/gems/ruby-1.9.3-p0/gems/rails-0.9.5)
WARNING: 'require 'rake/rdoctask'' is deprecated.  Please use 'require 'rdoc/task' (in RDoc 2.4.2+)' instead.
at /home/user/.rvm/gems/ruby-1.9.3-p0/gems/rake-0.9.2.2/lib/rake/rdoctask.rb
rake/gempackagetask is deprecated.  Use rubygems/package_task instead

rm -rf /tmp/demo_app/generate
rake aborted!
can't convert nil into String

Tasks: TOP => fresh_gem_rails => make_dir_structure => make_base_dirs
(See full trace by running task with --trace)

(One thing to mention that there is no Rakefile in the directory).

What does can't convert nil into String mean? (I tried to place --trace into various places onto the command line, but the messages didn't seem to change ...)

Also how do I correct the RDoc warning?

Thanks

Answer 1

That rails-0.9.5 in /home/user/.rvm/gems/ruby-1.9.3-p0/gems/rails-0.9.5 sounds suspicious to me.

Are you sure your Rails installation isn't screwed up?

EDIT

And what's that rvm all for, anyway? I'm not an rvm guru, but from what I could gather it looks like it does something for all installed rubies, which most certainly isn't what you want here.