如何查询两个模型以过滤掉对模型的引用?

How to query over two models to filter out a reference to a model?

假设我有两个模型。

class Applicant(models.Model):
    firstName = models.CharField(max_length=50)
    applicationStatus = models.CharField(max_length=15, default="Pending")

class VolInterview(models.Model):
    applicant = models.OneToOneField('Applicant')
    reasonForRejection = models.CharField(max_length=1000, default="N/A")

现在我只想找到那些没有被任何 VolInterivew 实例推荐的申请人。我该怎么做?

Applicant.objects.filter(volinterview__isnull=True)

Django doc 对于 isnull