Question

models.py：

class Post(models.Model):
    author = models.ForeignKey('User')
    text = models.TextField(max_length=320)
    created_date = models.DateTimeField(default=timezone.now)

class Likes(models.Model):
    post = models.ForeignKey('Post')
    liker = models.ForeignKey('User')
    created_date = models.DateTimeField(default=timezone.now)

    class Meta:
        unique_together = ('post', 'liker')

我想获得他们喜欢的最新帖子超过70个。如何用django orm编写该查询集？

Answer 1

您需要注释喜欢的数量，然后过滤

Post.objects.annotate(num_likes=Count('likes')).filter(num_likes__gt=70).order_by('-created_date')

Answer 2

你可以像这个例子那样做QV。

qv = Likes.objects.filter(liker__gt = 70).all()
out = Post.objects.filter(id__in=qv).order_by('-created_at')

获取django中按时间排序的最受欢迎的帖子

2 个答案: