您可以覆盖save方法。
class MyModel(mongoengine.Document):
creation_date = mongo.DateTimeField()
modified_date = mongo.DateTimeField(default=datetime.datetime.Now)
def save(self, *args, **kwargs):
if not self.creation_date:
self.creation_date = datetime.datetime.Now()
self.modified_date = datetime.datetime.Now()
return super(MyModel, self).save(*args, **kwargs)
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