我正在尝试删除数据库中已经发生的事件。我的脚本如下。
在**的那一行，我得到一个错误
AttributeError: type object 'events' has no attribute 'query'
有人知道怎么解决吗？谢谢!
Base = automap_base()
# engine, suppose it has two tables 'user' and 'address' set up
engine = create_engine("DB_URL")
# reflect the tables
Base.prepare(engine, reflect=True)
# mapped classes are now created with names by default
# matching that of the table name.
Event = Base.classes.events
User = Base.classes.users
**events = Event.query.filter(end_time < datetime.now())**
session = Session(engine)
session.delete(events)
session.commit()
最佳答案
您不在映射类上调用 query()，而是在 session 对象上调用 query():
Base = automap_base()
# engine, suppose it has two tables 'user' and 'address' set up
engine = create_engine("DB_URL")
# reflect the tables
Base.prepare(engine, reflect=True)
# mapped classes are now created with names by default
# matching that of the table name.
Event = Base.classes.events
User = Base.classes.users
session = Session(engine)
selected_events = session.query(Event).filter(Event.end_time < datatime.now())
selected_events.delete()
session.commit()
关于python - SQL炼金术 : AttributeError: type object 'events' has no attribute 'query' ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41092829/