也许我搜索不正确,但我还没有找到这个......
我有三个模型。这里有两个,另一个是User模型:
class Comment(Model(20)):
text = TextField(max_length=160)
class Look(Model(20)):
comments = ManyToManyField(Comment, related_name='comments', editable=False)
likes = ManyToManyField(get_user_model(), related_name="look_likes", editable=False)
现在我想按点赞数和评论数(Count(likes) + Count(comments))排序我的 Looks。
我试过了:
most_wanted = Look.objects.all()
most_wanted = most_wanted.annotate(count_comments=Count('comments'))
most_wanted = most_wanted.annotate(count_likes=Count('likes'))
most_wanted = most_wanted.extra(select = { 'count': 'count_comments + count_likes' })
但是带注释的字段不适用于额外的。我也试过:
most_wanted = Look.objects.all()
most_wanted = most_wanted.extra(select = { 'count': 'Count(comments) + Count(likes)' })
但是相关字段(来自ManyToMany)也不适用于extra。
有什么想法吗?