Tidak dapat membuat mongoid bekerja dengan Rails 4

Saya telah memecahkan ini dengan menambahkan:

Mongoid.load!(Rails.root.join("/config/mongoid.yml"))

ke config/intializers/mongoid.rb , sesuai tutorial.

Anda juga harus mengubah baris berikut di file config/application.rb Anda dari:

require 'rails/all'

ke (dalam Rails 3.x):

require "action_controller/railtie"
require "action_mailer/railtie"
require "active_resource/railtie"
require "rails/test_unit/railtie"
# require "sprockets/railtie" # Uncomment this line for Rails 3.1+

atau (di Rails 4.x):

# Pick the frameworks you want:
# require "active_record/railtie"
require "action_controller/railtie"
require "action_mailer/railtie"
require "sprockets/railtie"
require "rails/test_unit/railtie"