def have_fields_changed(obj, *fields):
	"""Returns True if all the specified fields on an object have changed compared the current database version."""
	if not obj.pk:
		return False
	try:
		current_obj = obj.__class__.objects.only(*fields).get(pk=obj.pk)
		for field in fields:
			if getattr(obj, field) == getattr(current_obj, field):
				return False
		return True
	except:
		return False