def save(self, must_create=False):
session = Session.get_session(self.session_key)
if must_create and session:
raise CreateError
if must_create:
session = Session()
session.session_key = self.session_key
session.session_data = self.encode(self._get_session(no_load=must_create))
session.expire_date = self.get_expiry_date()
else:
if not session:
return None
session.session_data = self.encode(self._get_session(no_load=must_create))
session.expire_date = self.get_expiry_date()
session.save()
