Mongoid Installation for Rails 4.2

[ArTiSTiX]

Mongoid Installation Documentation seems to be incomplete.

In Getting Rid of Active Record it shows how to replace require 'rails/all' in order to remove ActiveRecord, but there is a line missing to require action_view:

require "action_view/railtie"

Because of this incomplete example, it took me hours to figure out why my Rails App was throwing an error about nokogiri gem...
Thank you on behalf of beginners for correcting this documentation.