def _ValidateUpdateFollowed(self, user_id, viewpoint_id, old_timestamp, new_timestamp):
"""Validate that an older Followed record was deleted and a newer created."""
if old_timestamp is not None and \
Followed._TruncateToDay(new_timestamp) > Followed._TruncateToDay(old_timestamp):
db_key = DBKey(user_id, Followed.CreateSortKey(viewpoint_id, old_timestamp))
self.ValidateDeleteDBObject(Followed, db_key)
self.ValidateCreateDBObject(Followed,
user_id=user_id,
viewpoint_id=viewpoint_id,
sort_key=Followed.CreateSortKey(viewpoint_id, new_timestamp),
date_updated=Followed._TruncateToDay(new_timestamp))
def _Validate(follower_id, viewpoint_id, last_updated):
sort_key = Followed.CreateSortKey(viewpoint_id, last_updated)
self._validator.ValidateCreateDBObject(Followed,
user_id=follower_id,
sort_key=sort_key,
date_updated=Followed._TruncateToDay(last_updated),
viewpoint_id=viewpoint_id)
invalidate = NotificationManager._CreateViewpointInvalidation(viewpoint_id)
self._validator.ValidateNotification('dbchk add_followed',
follower_id,
self._op_dict,
invalidate)
