相同的表Django ORM软删除方法可以吗?

我使用以下设置在Django中实现软删除。我不是很熟悉的Django的引擎盖下,所以我很感谢任何反馈,对我可能遇到的问题。我特别不喜欢将QuerySet子类化。

基本思想是 delete 在 MyModel 变化 我的模型 date_deleted 删除 删除 QuerySet ,可以绕过对象的 删除 deleted_objects

使用此设置需要定义 DeletionQuerySet 和 DeletionManager 和添加 删除日期 , objects 删除的\u对象 到您的模型。

谢谢,

strongly discouraged

class DeletionQuerySet(models.query.QuerySet):

    def delete(self):
        prev_deleted = self.filter(date_deleted__isnull=False)
        prev_deleted.actual_delete()
        prev_undeleted = self.filter(date_deleted__isnull=True)
        prev_undeleted.update(date_deleted=datetime.datetime.now())

    def actual_delete(self):
        super(DeletionQuerySet, self).delete()

class DeletionManager(models.manager.Manager):

    # setting use_for_related_fields to True for a default manager ensures
    # that this manager will be used for chained lookups, a la double underscore,
    # and therefore that deleted Entities won't popup unexpectedly.
    use_for_related_fields = True

    def __init__(self, hide_deleted=False, hide_undeleted=False):
        super(DeletionManager, self).__init__()
        self.hide_deleted = hide_deleted
        self.hide_undeleted = hide_undeleted

    def get_query_set(self):
        qs = DeletionQuerySet(self.model)
        if self.hide_deleted:
            qs = qs.filter(date_deleted__isnull=True)
        if self.hide_undeleted:
            qs = qs.filter(date_deleted__isnull=False)
        return qs

class MyModel(models.Model):

    # Your fields here...
    date_deleted = models.DateTimeField(null=True)

    #the first manager defined in a Model will be the Model's default manager
    objects = DeletionManager(hide_deleted=True)
    deleted_objects = DeletionManager(hide_undeleted=True)

    def delete(self):
        if self.date_deleted is None:
            self.date_deleted = datetime.datetime.now()
            self.save()
        else:
            super(Agreement, self).delete()