def get_device(self):
# If ID supplied, find and update that ID.
input = web.input(id=None)
devices = UserDevices.get_user_device_collection(
users.get_current_user())
device = UserDevice(parent=devices)
if input.id and long(input.id) > 0:
# Load device from ID.
device = UserDevice.get_by_id(long(input.id), devices)
if not device:
# Invalid ID. 404.
raise web.notfound()
# Check that the device belongs to the logged in user.
if device.owner.user_id() != users.get_current_user().user_id():
# It's not theirs. 404.
# TODO: Test this more and better.
raise web.notfound()
return device
