flask-sqlalchemy 中提示找不到 event？ - V2EX

flask-sqlalchemy 中提示找不到 event？ - V2EX

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// models.py db.event.listen(User.declare, 'set', User.declare_cache)

File "E:\Program\python\1\myapp\models.py", line 156, in <module> db.event.listen(User.declare, 'set', User.declare_cache) AttributeError: 'SQLAlchemy' object has no attribute 'event'

3 条回复

1

florije

2016-01-19 12:46:47 +08:00

一般这么使用：
from sqlalchemy import event
event.listen(something)

2

skywatcher

OP

2016-01-19 13:22:52 +08:00

@florije 上面那么用是用的 Flask-SQLAlchemy ；但是你说的这招也用过了，报的错是： TypeError: 'InstrumentedAttribute' object is not callable

3

skywatcher

OP

2016-01-19 13:49:00 +08:00

@florije 对的，我之前忽略调用函数

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