August 2018
Intermediate to advanced
230 pages
6h 42m
Chinese
Content preview from Flask Web开发：基于Python的Web应用开发实战（第2版）
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模板
｜
31
3.6
使用
Flask-Moment
本地化日期和时间
如果
Web
应用的用户来自世界各地，那么处理日期和时间可不是一个简单的任务。
服务器需要统一时间单位，这和用户所在的地理位置无关，所以一般使用协调世界时
（
UTC
，
coordinated universal time
）。不过用户看到
UTC
格式的时间会感到困惑，他们更希
望看到当地时间，而且采用当地惯用的格式。
要想在服务器上只使用
UTC
时间，一个优雅的解决方案是，把时间单位发送给
Web
浏览
器，转换成当地时间，然后用
JavaScript
渲染。
Web
浏览器可以更好地完成这一任务，因
为它能获取用户计算机中的时区和区域设置。
有一个使用
JavaScript
开发的优秀客户端开源库，名为
Moment.js
，它可以在浏览器中渲染
日期和时间。
Flask-Moment
是一个
Flask
扩展，能简化把
Moment.js
集成到
Jinja2
模板中
的过程。
Flask-Moment
使用
pip
安装：
(venv) $
pip install flask-moment
这个扩展的初始化方法与
Flask-Bootstrap
类似，所需的代码如示例
3-11
所示。
示例
3-11
hello.py
：初始化
Flask-Moment
from flask_moment import Moment
moment = Moment(app)
除了
Moment.js
，
Flask-Moment
还依赖
jQuery.js
。因此，要在
HTML
文档的某个地方引入
这两个库，可以直接引入，这样可以选择使用哪个版本 ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.