在这里，我没有从数据库中删除模型对象。我只是is_deleted在删除时将状态更改为 True。但是在这样做时unique=True会为已删除的对象带来错误，那么我该如何处理呢？

我想is_deleted=True从唯一的 True 中排除对象。

class MyModel(models.Model):
    name = models.CharField(max_length=20, unique=True)
    is_deleted = models.BooleanField(default=False)


#views
class MyViewSet(ModelViewSet):

    serializer_class = MySerializer
    queryset = MyModel.objects.all()

    def destroy(self, request, *args, **kwargs):
        object = self.get_object()
        object.is_deleted = True
        object.save()
        return Response(status=status.HTTP_204_NO_CONTENT)

回答

from django.db.models import Q


class MyModel(models.Model):
    name = models.CharField(max_length=20)
    is_deleted = models.BooleanField(default=False)
    
    class Meta:
        constraints = [
            models.UniqueConstraint(fields=['name'], condition=Q(is_deleted=False), name='unique_undeleted_name')
        ]