def get_pad(self, pad_id):
if not isinstance(pad_id, ObjectId):
pad_id = Pad.make_id(pad_id)
if pad_id == self._current_pad_id:
return self.get_current_pad()
pad = Pad.lookup(pad_id, self)
return pad
def get_current_pad(self):
"""
The current pad always exists; A new one is created if necessary.
"""
if self._current_pad_id is None:
cursor = Pad.iterate(self, 1)
try:
self._current_pad = cursor.next()
except StopIteration:
self._current_pad = Pad.make(self.get_id())
self._current_pad_id = self._current_pad.get_id()
self.save()
if self._current_pad is None:
try:
pad = Pad.lookup(self._current_pad_id, self)
except PadInvalidId:
pad = Pad.make(self)
self._current_pad = pad
self._current_pad_id = self._current_pad.get_id()
self.save()
return self._current_pad
def set_current_pad(self, pad):
"""
Set the currently active pad
INPUT:
- ``pad`` -- a :class:`pad.Pad` or a pad id (:class:`ObjectId`
or string).
Throws `PadInvalidId` if ``pad`` does not exists.
"""
if isinstance(pad, basestring):
pad = Pad.make_id(pad)
if isinstance(pad, ObjectId):
if pad == self._current_pad_id:
return
pad = Pad.lookup(pad, self)
if pad.get_id() == self._current_pad_id:
return
self._current_pad = pad
self._current_pad_id = pad.get_id()
self.save()
