本文介绍了Django用空的ManyToManyField选择对象的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

考虑到以下模型,知道一个家庭,如何选择没有买家的孩子?

Considering the following models, knowing a family, how do I select Kids with no buyers?

class Family...

class Kid(models.Model):
    name = models.CharField(max_length=255)
    family = models.ForeignKey(Family)
    buyer = models.ManyToManyField(Buyer, blank=True, null=True)

family = get_object_or_404(Family, pk=1)
for_sale = family.kid_set.filter(buyer... this screws my child trade business


推荐答案

family.kid_set .filter(buyer__isnull = True)应该工作。

这篇关于Django用空的ManyToManyField选择对象的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

09-24 15:09