Rails g misslyckas för mongoida kommandon

Jag hade olika problem med buntar/pärlor med ett nytt Rails 3.2.3-projekt följt av din Gemfile. Jag kunde komma förbi det genom att ta bort Gemfile.lock och köra 'buntinstallation' igen. Loggen över vad jag gjorde är bifogad och den inkluderar excising ActiveRecord. Hoppas att detta hjälper.

$ ruby -v
ruby 1.9.3p125 (2012-02-16 revision 34643) [x86_64-darwin11.3.0]
$ rails new free-11479-mongoid-rails-g
$ cd free-11479-mongoid-rails-g

Gemfile as per user

$ bundle install
You have requested:
  json ~> 1.6.3

The bundle currently has json locked at 1.7.1.
Try running `bundle update json`

$ bundle update json
Bundler could not find compatible versions for gem "multi_json":
  In Gemfile:
    rabl (~> 0.5.1) ruby depends on
      multi_json (~> 1.0.3) ruby

    guard-jasmine (>= 0) ruby depends on
      multi_json (1.3.4)

$ rm Gemfile.lock
$ bundle install
$ rails g mongoid:config
     create  config/mongoid.yml
---------
Assuming that you want to excise ActiveRecord...

dereference ActiveRecord

    config/application.rb
        #config.active_record.whitelist_attributes = true
    config/environments/development.rb
        #config.active_record.mass_assignment_sanitizer = :strict
        #config.active_record.auto_explain_threshold_in_seconds = 0.5
    config/environments/development.rb
        #config.active_record.mass_assignment_sanitizer = :strict
    test/test_helper.rb
      #fixtures :all

$ rm database.yml

config/application.rb
    #require 'rails/all'
    require "action_controller/railtie"
    require "action_mailer/railtie"
    require "active_resource/railtie"
    require "rails/test_unit/railtie"

$ rake test # passes