Rails g échouant pour les commandes mongoid

J'ai eu divers problèmes de bundler/gem avec un nouveau projet Rails 3.2.3 suivi de votre Gemfile. J'ai pu le contourner en supprimant Gemfile.lock et en réexécutant 'bundle install'. Le journal de ce que j'ai fait est joint et comprend l'excision d'ActiveRecord. J'espère que cela vous aidera.

$ 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