undefined method for main object

[zine27]

Hi,
I am new at rails and I cant seam to get past this error. Can someone help?


./script/../config/boot.rb:29 undefined method gem for main:Object (NoMethodError)
from c:/installRails/InstantRails/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:21:in 'require'
from script/server:2

[zine27]

Sorry I fixed my own error. I had not installed ruby.

[mattymcg]

Hi zine27.

The update to Rails that occurred earlier this month resulted in Rails relying on a more recent version of RubyGems than the one released with InstantRails 1.3a. This is mentioned on the book's errata page. To update RubyGems, type the following at the command line:

gem update --system

The whole point of InstantRails is that you should not have to "install ruby". But you do need to operate from a command line window that is launched from within InstantRails (click on the black I, then select Rails Applications > Launch Ruby Console Window). If you try and use ruby, the gem command or rails from a regular command prompt, it also might throw an error like the one you reported.

Hope that helps.

[kennethgsmith]

I am having the same problem. I tried running
gem update --system
from a InstantRails cmd window and it seemed to work until the very end where it gave this message:

Successfully built RubyGem
Name: sources
Version: 0.0.1
File: sources-0.0.1.gem
hook C:/InstantRails/InstantRails/ruby/lib/ruby/gems/1.8/gems/rubygems-update-0.9.2/./post-install.rb failed:
undefined method `post_install_message' for #<Gem::Specification:0x2c46068>
Try 'ruby setup.rb --help' for detailed usage.
RubyGems system software updated


Any suggestions?

[MiiJaySung]

Use Linux?

Seriously, Windows is a PITA for ruby development as everything has to be setup. If you switch to a good distro like Ubuntu, Debian, etc, you'll make life easier. Ubuntu Linux has got to the stage where it's easier to use than Windows imo. The only need for Windows is for Photoshop and Firebug now.

It does look like you might have path issues (hazarding a wild, but reasonable guess)

[Fenrir2]

The problem is not windows, it's InstantRails. Ruby works fine if you use the One Click Ruby Installer. I don't know if InstantRails is the problem here, but in general the One Click Ruby Installer works and InstantRails doesn't.