python - 按降序对列表进行排序 Jinja

Question

我正在使用 Jinja 模板引擎在 Flask 中创建一个网站。我有一个公告列表，但没有好的方法来对它们进行排序。

他们现在在一个由 id 调用的表中。我想按最新排序(这意味着最高 ID)

喜欢:

• P1
  • 5
  • 4
  • 3
• P2
  
  • 2
  • 1

在我的 HTML 中，我为 Jinja 添加了这条指令:

<div id="main"> 

{% autoescape false %}
{% for announcement in announcements.items|sort(attribute='id', reverse = True) %}

  <a name={{announcement.title}}></a>
  <h1>{{announcement.title}} - Posted on: {{announcement.date}}</h1>
  {{announcement.body}}
  <br/>
  <hr/>

{% endfor %}
{% endautoescape %}

 <p class = "footer">{% if announcements.has_prev %}<a href="{{ url_for('index', page = announcements.prev_num) }}"><< Newer posts</a>{% else %}<< Newer posts{% endif %} | 
 {% if announcements.has_next %}<a href="{{ url_for('index', page = announcements.next_num) }}">Older posts >></a>{% else %}Older posts >>{% endif %} </p>

<br/>
</div>

还有 python :

from flask import render_template, Markup
from app import app
from config import POSTS_PER_PAGE
from models import Announcement, VideoAnnouncement

@app.route('/')
@app.route('/index')
@app.route('/index/<int:page>')
def index(page = 1):
    loggedOut = True
    announcements = Announcement.query.paginate(page, POSTS_PER_PAGE, True)
    videoAnnounce = VideoAnnouncement.query.all()
    return render_template("index.html", announcements = announcements, videoAnnouncements = videoAnnounce , loggedOut = loggedOut)

但那是这样的:

• P1
  • 3
  • 2
  • 1
• P2
  
  • 5
  • 4

有没有办法降序排列又不会被页面弄乱？

(我希望我的问题是有道理的)

Answer 1

采纳 gnibbler 的建议。我在分页之前重新排序了查询。

更新代码:

from flask import render_template, Markup
from app import app
from config import POSTS_PER_PAGE
from models import Announcement, VideoAnnouncement

@app.route('/')
@app.route('/index')
@app.route('/index/<int:page>')
def index(page = 1):
    loggedOut = True
    query = Announcement.query.order_by(Announcement.id.desc())
    announcements = query.paginate(page, POSTS_PER_PAGE, True)
    videoAnnounce = VideoAnnouncement.query.all()
    return render_template("index.html", announcements = announcements, videoAnnouncements = videoAnnounce , loggedOut = loggedOut)