django同一张表ForeignKey自关联 Fmaj

class TestModel(models.Model):
    name = models.CharField(max_length=100)
    title = models.CharField(max_length=200)
    test = models.ForeignKey('TestModel', on_delete=models.CASCADE, default=-1, null=True, blank=True)

#关联自身，表内一对多
test = models.TestModel.objects.create(name='物理机', title='测试')
models.TestModel.objects.create(name='虚拟机1', title='验证', test=test)
models.TestModel.objects.create(name='虚拟机2', title='验证', test=test)
models.TestModel.objects.create(name='虚拟机3', title='验证', test=test)

test = models.TestModel.objects.get(id=3).test.name
test = models.TestModel.objects.get(id=1).testmodel_set.all()
for te in test:
    print(te.name, te.title)

获取表所有字段：test._meta.fields