查询所有对象,包括 SoftDeletableModel 的软删除对象

Querying all objects including soft deleted ones of a SoftDeletableModel

我正在尝试摆脱自制解决方案,转而使用更标准的解决方案。我以前的模式:

class MarkDeleteManager(models.Manager):
    use_for_related_fields = True

    def get_queryset(self):
        if "instance" in self._hints:
            return super(MarkDeleteManager, self).get_queryset()
        return super(MarkDeleteManager, self).get_queryset().filter(deleted=False)

    def all_with_deleted(self):
        return super(MarkDeleteManager, self).get_queryset()

    def deleted_set(self):
        return super(MarkDeleteManager, self).get_queryset().filter(deleted=True)

    def using(self, *args, **kwargs):
        ''' if a specific record was requested, return it even if it's deleted '''
        return self.all_with_deleted().using(*args, **kwargs)

我想用 django-model-util 的 SoftDeletableModel 替换它,但我在 SoftDeletableManagerMixin 中没有看到任何类似 all_with_deleted 的功能 - 它只会覆盖 get_queryset 就是这样。我的架构是去中心化的,当我通知其他节点软删除时,我需要访问这些节点。

所以我会这样解决:

from model_utils.models import SoftDeletableModel

class MyModel(SoftDeletableModel):
    all_objects = models.Manager()  # To access soft deleted objects as well

    name = models.CharField()
    ...

这样我就可以通过说 MyModel.all_objects.all() 而不是旧模式的 MyModel.objects.all_with_deleted().all() 来访问所有对象。 MyModel.objects.all() 在这两种情况下都将只提供非软删除的。