peewee中的DateTimeField是否有自动更新选项,例如MySQL中的TimeStamp? [英] is there an auto update option for DateTimeField in peewee like TimeStamp in MySQL?
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问题描述
每次在MySQL中修改记录时,我都希望更新一个timestamp字段.
I would like a timestamp field updating each time the record is modified like in MySQL.
DateTimeField(default=datetime.datetime.now())
只会在第一次创建时进行设置...
DateTimeField(default=datetime.datetime.now())
will only set it the first time it is created...
有没有简单的解决方案? 唯一的解决方案是在MySQL数据库中手动设置Column选项吗?
Any have a simple solution? Is the only solution is to manually set the Column options in MySQL db?
推荐答案
您可以在模型类上覆盖save
方法.
You can override the save
method on your model class.
class Something(Model):
created = DateTimeField(default=datetime.datetime.now)
modified = DateTimeField
def save(self, *args, **kwargs):
self.modified = datetime.datetime.now()
return super(Something, self).save(*args, **kwargs)
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