使用in_的sqlalchemy过滤器

Question

是否有更有效的方法来执行以下操作？我更感兴趣的是知道是否有办法设置"mylist"以匹配任何东西,如果day等于'all',因为在其他情况下,"mylist"可以包含更多元素.

if day == 'all':
    mylist = ['monday','tuesday','wednesday','thursday','friday','saturday','sunday']
else:
    mylist = [day] # day equal to one of the above

records = meta.Session.query(Transaction).filter(Transaction.day.in_(mylist)).all()

Answer 1

如果它等于那么就不过滤那天'all'呢？

query = meta.session.query(Transaction)
if day != 'all':
    query = query.filter(Transaction.day == day)
records = query.all()