When doing

c = Category.new
c.name = "Foobar"
c.name_changed? # Returns true

name_changed? returns true, as one would expect, but when you create a new Category by doing

c = Category.new(:name => "Foobar")
c.name_changed? # Returns false

name_changed? returns false, is this how its supposed to work? As its not quite what I was expecting and feels much like a bug!

My Model can be found below for reference.

1. app/models/category.rb
   class Category
   include Mongoid::Document
   include Mongoid::Timestamps

field :name, :type => String
field :slug, :type => String

attr_accessible :name

validates :name,
:presence => true
end