跟老齐学Django 4：扩展网站功能

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数据库配置

users_like = models.ManyToManyField(User, related_name="articles_like", blank=True)

多对多的关系

./mysite/settings.py

REDIS_HOST = 'localhost'
REDIS_PORT = 6379
REDIS_DB = 0

./article/list_views.py

import redis
from django.conf import settings
r = redis.StrictRedis(host=settings.REDIS_HOST, port=settings.REDIS_PORT, db=settings.REDIS_DB)

Redis对于键的命名并没有强制的要求，比较好的做法是用“对象类型：对象ID：对象属性”，如使用键article:15:views来存储ID为15的文章的浏览次数

def article_detail(request, id, slug):
	articles = get_object_or_404(ArticlePost, id=id, slug=slug)
	total_views = r.incr('article:{}:views'.format(article.id))
	return render(request, "article/list/article_detail.html", {"articles":articles,
		"total_views":total_views})

显示最“热”文章

def article_detail(request, id, slug):
	articles = get_object_or_404(ArticlePost, id=id, slug=slug)
	total_views = r.incr('article:{}:views'.format(article.id))

	r.zincrby('article_ranking', article.id, 1)
	article_ranking = r.zrange('article_ranking', 0, -1, desc=True)[:10]
	article_ranking_ids = [int(id) for id in article_ranking]
	most_viewed = list(ArticlePost.objects.filter(id__in = article_ranking_ids))
	most_viewed.sort(key=lambda x: article_ranking_ids.index(x.id))
	return render(request, "article/list/article_detail.html", {"articles":articles,
		"total_views":total_views, "most_viewed": most_viewed})