django-taggit获取随机标签跳过未分配给帖子的标签

Question

我想在单击搜索栏时向用户提供随机标签的建议。到目前为止，我的代码返回我想要的内容，但它也返回的标签，这些标签未分配给任何帖子，即：当我删除帖子或删除其标签时，这些标签仍在建议中显示。

# Get the suggestions (In View)
suggestions = Tag.objects.all().distinct().order_by('?')[:5]
# Model
class Post(models.Model):
title = models.CharField(max_length=256)
disclaimer = models.CharField(max_length=256, blank=True)
BLOGS = 'blogs'
APPLICATIONS = 'applications'
GAMES = 'games'
WEBSITES = 'websites'
GALLERY = 'gallery'
PRIMARY_CHOICES = (
    (BLOGS, 'Blogs'),
    (APPLICATIONS, 'Applications'),
    (GAMES, 'Games'),
    (WEBSITES, 'Websites'),
)
content_type = models.CharField(max_length=256, choices=PRIMARY_CHOICES, default=BLOGS)
screenshot = models.CharField(max_length=256, blank=True)
tags = TaggableManager()
body = RichTextField()
date_posted = models.DateTimeField(default=datetime.now)
date_edited = models.DateTimeField(blank=True, null=True)
visible = models.BooleanField(default=True)
nsfw = models.BooleanField()
allow_comments = models.BooleanField(default=True)
files = models.ManyToManyField(File, blank=True)
def __str__(self):
    if (self.visible == False):
        return '(Hidden) ' + self.title + ' in ' + self.content_type
    return self.title + ' in ' + self.content_type

Answer 1

如果仅想要分配给帖子的标签，则必须查询其标签的帖子并选择其中的五个：

allposts = Post.objects.all()
five_tags = list(set([tag.slug for post in allposts for tag in post.tags.all()]))[:5]

(使用set()删除重复项(

编辑

如果您想在选择五个之前将所有标签洗牌，则可以做类似的事情：

import random
allposts = Post.objects.all()
all_tags_list = list(set([tag.slug for post in allposts for tag in post.tags.all()]))
random.shuffle(all_tags_list)
five_tags = all_tags_list[:5]