MAC OSX: Ruby on Rails and MongoDB Configuration - ruby

Question

This may have been asked somewhere else but I either couldn't find it or the solution didn't help me.
I successfully installed Homebrew, RVM, Ruby on Rails and mongoDB.
I followed these instructions http://mongoid.org/en/mongoid/docs/installation.html when installing mongoid but when I ran
rails g mongoid:config it said it could not find the generator.
So I ran rails g and it wasn't in the list. I checked my gem.lock file and it wasn't in there either. I manually put it in there but still no results.
When I ran bundle install on the project it wasn't there either. I tried installing it in my main directory and in the project directory to no avail.
Any direction would be greatly appreciated as I am new to this.
EDIT: My gem.lock file:
GEM
remote: https://rubygems.org/
specs:
actionmailer (3.2.11)
actionpack (= 3.2.11)
mail (~> 2.4.4)
actionpack (3.2.11)
activemodel (= 3.2.11)
activesupport (= 3.2.11)
builder (~> 3.0.0)
erubis (~> 2.7.0)
journey (~> 1.0.4)
rack (~> 1.4.0)
rack-cache (~> 1.2)
rack-test (~> 0.6.1)
sprockets (~> 2.2.1)
activemodel (3.2.11)
activesupport (= 3.2.11)
builder (~> 3.0.0)
activerecord (3.2.11)
activemodel (= 3.2.11)
activesupport (= 3.2.11)
arel (~> 3.0.2)
tzinfo (~> 0.3.29)
activeresource (3.2.11)
activemodel (= 3.2.11)
activesupport (= 3.2.11)
activesupport (3.2.11)
i18n (~> 0.6)
multi_json (~> 1.0)
arel (3.0.2)
builder (3.0.4)
coffee-rails (3.2.2)
coffee-script (>= 2.2.0)
railties (~> 3.2.0)
coffee-script (2.2.0)
coffee-script-source
execjs
coffee-script-source (1.4.0)
erubis (2.7.0)
execjs (1.4.0)
multi_json (~> 1.0)
hike (1.2.1)
i18n (0.6.1)
journey (1.0.4)
jquery-rails (2.2.0)
railties (>= 3.0, < 5.0)
thor (>= 0.14, < 2.0)
json (1.7.6)
mail (2.4.4)
i18n (>= 0.4.0)
mime-types (~> 1.16)
treetop (~> 1.4.8)
mime-types (1.19)
multi_json (1.5.0)
polyglot (0.3.3)
rack (1.4.4)
rack-cache (1.2)
rack (>= 0.4)
rack-ssl (1.3.2)
rack
rack-test (0.6.2)
rack (>= 1.0)
rails (3.2.11)
actionmailer (= 3.2.11)
actionpack (= 3.2.11)
activerecord (= 3.2.11)
activeresource (= 3.2.11)
activesupport (= 3.2.11)
bundler (~> 1.0)
railties (= 3.2.11)
railties (3.2.11)
actionpack (= 3.2.11)
activesupport (= 3.2.11)
rack-ssl (~> 1.3.2)
rake (>= 0.8.7)
rdoc (~> 3.4)
thor (>= 0.14.6, < 2.0)
rake (10.0.3)
rdoc (3.12)
json (~> 1.4)
sass (3.2.5)
sass-rails (3.2.6)
railties (~> 3.2.0)
sass (>= 3.1.10)
tilt (~> 1.3)
sprockets (2.2.2)
hike (~> 1.2)
multi_json (~> 1.0)
rack (~> 1.0)
tilt (~> 1.1, != 1.3.0)
sqlite3 (1.3.7)
thor (0.17.0)
tilt (1.3.3)
treetop (1.4.12)
polyglot
polyglot (>= 0.3.1)
tzinfo (0.3.35)
uglifier (1.3.0)
execjs (>= 0.3.0)
multi_json (~> 1.0, >= 1.0.2)
PLATFORMS
ruby
DEPENDENCIES
coffee-rails (~> 3.2.1)
jquery-rails
rails (= 3.2.11)
sass-rails (~> 3.2.3)
sqlite3
uglifier (>= 1.0.3)
EDIT: Sorry here's my GEmfile:
source 'https://rubygems.org'
gem 'rails', '3.2.11'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
gem 'sqlite3'
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '~> 3.2.3'
gem 'coffee-rails', '~> 3.2.1'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', :platforms => :ruby
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'
# To use Jbuilder templates for JSON
# gem 'jbuilder'
# Use unicorn as the app server
# gem 'unicorn'
# Deploy with Capistrano
# gem 'capistrano'
# To use debugger
# gem 'debugger'

Answer 1

As per instructions, add
gem "mongoid", "~> 3.0.0"
to your Gemfile to use Mongoid 3, and then
bundle install
Make sure that bundle install succeeds, check Gemfile.lock for mongoid, then
rails g mongoid:config