Rails undefined method 'groups' for rails module

Question

Working on Mac OS X, trying to learn rails. When I type: "rails generate Scaffold User name:string email:string", I get the following error:

    /Users/dnf1991/rails_projects/demo_app/config/application.rb:7:in `<top (required)>': undefined method `groups' for Rails:Module (NoMethodError)
from /Users/dnf1991/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/railties-3.0.9/lib/rails/commands.rb:15:in `require'
from /Users/dnf1991/.rvm/gems/ruby-1.9.2-p290@rails3tutorial/gems/railties-3.0.9/lib/rails/commands.rb:15:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'

Any thoughts?

Try scaffold in lower-case. (I get a different error when I use Scaffold in upper-case, also 1.9.2-p290 w/ Rails 3.0.9). — Dave Newton
– Dave Newton, Commented Sep 18, 2011 at 19:08
Gems included by the bundle: * abstract (1.0.0) * actionmailer (3.0.9) * actionpack (3.0.9) * activemodel (3.0.9) * activerecord (3.0.9) * activeresource (3.0.9) * activesupport (3.0.9) * arel (2.0.10) * builder (2.1.2) * bundler (1.0.18) * erubis (2.6.6) * i18n (0.5.0) * mail (2.2.19) * mime-types (1.16) * polyglot (0.3.2) * rack (1.2.3) * rack-mount (0.6.14) * rack-test (0.5.7) * rails (3.0.9) * railties (3.0.9) * rake (0.9.2) * rdoc (3.9.4) * sqlite3 (1.3.3) * thor (0.14.6) * treetop (1.4.10) * tzinfo (0.3.29) — user868443
– user868443, Commented Sep 18, 2011 at 19:19
Did you by any chance generate the rails app on rails 3.1 then changed the rails version to 3.0.x, and bundle update? I had the same message after having done this. — Mike K.
– Mike K., Commented Sep 20, 2011 at 20:29

Phillip Saindon · Accepted Answer · 2011-09-25 00:00:19Z

0

I had this exact same problem following the same guide you are. I deleted the project and re-generated, and did not follow the instructions to modify gemfile in the project to use 1.3.3 version of sql (and didn't comment out the other default inclusions) and the error went away.

answered Sep 25, 2011 at 0:00

Phillip Saindon

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