authenticated_controller.rb

class AuthenticatedController < ApplicationController
  before_filter :require_user, :complete_setup


  private

  def require_user
    redirect_to signin_path unless user
  end

  def complete_setup
    unless user.
           setting.
           completed?
      redirect_to settings_path
    end
  end
end

backtrace

activesupport (4.1.0.beta1) lib/active_support/inflector/methods.rb:231:in `const_get'
activesupport (4.1.0.beta1) lib/active_support/inflector/methods.rb:231:in `constantize'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/metadata.rb:913:in `block in find_from_parts'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/metadata.rb:912:in `each'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/metadata.rb:912:in `find'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/metadata.rb:912:in `find_from_parts'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/metadata.rb:895:in `find_module'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/metadata.rb:843:in `classify'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/metadata.rb:126:in `class_name'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/metadata.rb:575:in `klass'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/builder.rb:39:in `klass'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/builders/embedded/one.rb:21:in `build'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/accessors.rb:43:in `create_relation'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/accessors.rb:26:in `__build__'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/accessors.rb:104:in `block (2 levels) in get_relation'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/threaded/lifecycle.rb:125:in `_loading'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/accessors.rb:100:in `block in get_relation'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/threaded/lifecycle.rb:84:in `_building'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/accessors.rb:99:in `get_relation'
/Users/elia/.rvm/gems/ruby-2.1.0/bundler/gems/mongoid-53abd6c19bcc/lib/mongoid/relations/accessors.rb:188:in `block in getter'
app/auth/authenticated_controller.rb:13:in `complete_setup'

setting.rb

class Setting
  include Mongoid::Document
  embedded_in :user
end

user.rb

class User
  include Mongoid::Document
  embeds_one :setting, autobuild: true
end