Question

我试图在falcon中处理sqlalchemy事件，任务是在模型字段更改时发送消息：

# -*- coding: utf-8 -*-

from sqlalchemy import Column
from sqlalchemy import Boolean, Date, ForeignKey, Numeric
from sqlalchemy import event
from sqlalchemy_utils import UUIDType

from app.model import MyBaseModel

from app.emails import MyEventListener


class EventSend(MyBaseModel):
    __tablename__ = 'event_send'

    event_to = Column(Numeric(5, 1), nullable=True)
    current = Column(Boolean, nullable=False)
    start = Column(Date)
    end = Column(Date)
    status_id = Column(UUIDType, ForeignKey('status.id'))


event.listen(EventSend.status_id, 'set', MyEventListener.handler, named=True)

在MyEventListener中，我想知道进行更改并触发事件的用户。但是，如何在未通过会话的情况下获得经过身份验证的用户？

event仅向MyEventListener发送以下参数：

kwargs["value"]: new value for triggered field
kwargs["oldvalue"]: current value of the field
kwargs["target"]: object that triggers event e.g. app.model.EventSend object
kwargs["initiator"] sqlalchemy.orm.attributes.Event object

MyEventListener：

class MyEventListener(object):

    @classmethod
    def handler(cls, *args, **kwargs):

        if args:
            print(args)
        elif kwargs:
            print(kwargs)
        else:
            print("Wrong or unknown event")

请问您，在这种情况下我如何才能得到用户？或者在处理程序中触发事件时，应该采取什么措施来让用户做出更改？

如何在SQLAlchemy事件

0 个答案: