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Python Django:查询数据库_Python_Django - Fatal编程技术网

Python Django:查询数据库

Python Django:查询数据库,python,django,Python,Django,这是我的模型 class Question(models.Model): user = models.ForeignKey(User) followers = models.ManyToManyField(User, related_name='user_follow') 我想知道,我怎样才能过滤出用户关注最多的3个问题 谢谢:)你能试试吗: from django.db.models import Count Question.objects.annotate(cnt_f=

这是我的模型

class Question(models.Model):
    user = models.ForeignKey(User)
    followers = models.ManyToManyField(User, related_name='user_follow')
我想知道,我怎样才能过滤出用户关注最多的3个问题

谢谢:)

你能试试吗:

from django.db.models import Count

Question.objects.annotate(cnt_f=Count('followers')).order_by('user', '-cnt_f')[:3]

有关详细信息,请参见

,您可以按追随者数量订购queryset。像这样:

from django.db.models import Count

most_followed = Question.objects.annotate(follower_count=Count('user_follow')).order_by('-follower_count')
要筛选出以下三个最常见的问题:

top_three = most_followed[:3]

谢谢你,先生。Lil更改名称“追随者”与数据库冲突:)非常感谢,先生:)一切终于解决了!