python - “模型”对象不可迭代

Question

在作者模型中:

century = models.ManyToManyField(Century)

在 View 中:

a = get_object_or_404(Author.objects, id=id)

s = Author.objects.filter(century__in=a).order_by('?')[:3]

错误:

Exception Value: 'Author' object is not iterable

怎么了？作者可能属于两个世纪，我想从他的世纪/世纪中随机获得 3 位作者。

Answer 1

a = get_object_or_404(Author.objects, id=id)

s = Author.objects.filter(century__in=a.century.all()).order_by('?')[:3]