ludofleury

When I add this gem into my app Gemfile : gem 'mongoid', '~> 2.3.2. 
I'm unable to run any "rails g" command, it cause this stack trace : 

/MY_PATH/vendor/bundle/ruby/1.9.1/gems/activesupport-3.1.1/lib/active_support/whiny_nil.rb:48:in `method_missing': undefined method `values' for nil:NilClass (NoMethodError)
	from /server/poker/vendor/bundle/ruby/1.9.1/gems/mongoid-2.3.2/lib/mongoid/railtie.rb:64:in `block in <class:Railtie>'
	from /server/poker/vendor/bundle/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:30:in `instance_exec'
	from /server/poker/vendor/bundle/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:30:in `run'
	from /server/poker/vendor/bundle/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:55:in `block in run_initializers'
	from /server/poker/vendor/bundle/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:54:in `each'
	from /server/poker/vendor/bundle/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:54:in `run_initializers'