timeline.py 文件源码

def event_reorder_up(request):
    """Switch this event with the previous event
    and adjust the next event's previous_event_id"""
    ctx = request.context
    instance = ctx._instance
    db = instance.db
    next_event = db.query(TimelineEvent).filter_by(
        previous_event_id=instance.id).first()
    previous_event = instance.previous_event
    pre_previous_id = previous_event.previous_event_id
    # clear first to avoid index uniqueness checks
    previous_event.previous_event_id = None
    instance.previous_event_id = None
    if next_event:
        next_event.previous_event_id = None
    db.flush()
    instance.previous_event_id = pre_previous_id
    previous_event.previous_event_id = instance.id
    if next_event:
        next_event.previous_event_id = previous_event.id
    return HTTPOk()