gistfile1.rb

u = User.create!(:name => "user1", :adderss => "address1", :current_job => "job1")

u.address = "address2"
u.current_job = "job2"

u.current_job_changed? # => true
u.address_changed? # => true
u.changed? # => true
u.changed # => ['address', 'current_job']

u.tracked.current_job_changed? # => false
u.tracked.address_changed? # => false
u.tracked.changed? # => false
u.tracked.changed # => []

u.save!

u.current_job_changed? # => false
u.address_changed? # => false
u.changed? # => false
u.changed # => []


u.tracked.current_job_changed? # => true
u.tracked.address_changed? # => true
u.tracked.changed? # => true
u.tracked.changed # => ['address', 'current_job']

u.tracked.set_unchanged(:current_job)
u.tracked.current_job_changed? # => false

u.tracked.set_changed(:current_job)
u.tracked.current_job_changed? # => true

u.tracked.set_all_unchanged
u.tracked.changed? # => false
u.tracked.changed # => []

u.tracked.set_all_changed
u.tracked.changed? # => true
u.tracked.changed # => ['address', 'current_job'] # note name is not changed - only tracked attributes are marked as changed.