Ruby-on-rails Rails 3：如何在特定时区获取今天的日期？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/6060436/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Rails 3: How to get today's date in specific timezone?
提问by Misha Moroshko
To get today's date I do:
要获得今天的日期，我会这样做：
Date.today # => Fri, 20 May 2011
I would like to get today's date in a specific timezone, say 'Melbourne'.
我想在特定时区获取今天的日期，例如'Melbourne'.
I have the following setting in my application.rb:
我有以下设置application.rb：
config.time_zone = 'Melbourne'
and I set:
我设置：
Time.zone = 'Melbourne'
in my application controller before each action.
在我的每个动作之前的应用程序控制器中。
However, it doesn't help (I guess because these settings affects only dates that are stored in the database).
但是，它没有帮助（我猜是因为这些设置仅影响存储在数据库中的日期）。
How could I get today's date in 'Melbourne'?
我怎么能得到今天的日期'Melbourne'？
采纳答案by Ryan Bigg
You should be able to do this: Time.current. That would display the current time in Melbourne if that's what Time.zoneis set to.
你应该能够做到这一点：Time.current。如果这Time.zone是设置的，那将显示墨尔本的当前时间。
回答by Dylan Markow
Dateobjects don't necessarily have timezones, but Timeobjects do. You can try it as a Time, then convert back to a Date:
Date对象不一定有时区，但Time对象有。您可以尝试将其作为 a Time，然后转换回 a Date：
Time.now.to_date
# => Thu, 19 May 2011
Time.now.in_time_zone('Melbourne').to_date
# => Fri, 20 May 2011
回答by Josh
Date.current
Date.current
Date.currentis probably the most clear and succinct way, and was added in Rails 3.
Date.current可能是最清晰简洁的方式，并且是在 Rails 3 中添加的。
$ Date.current
#=> Sat, 14 Jul 2018
回答by Slick23
It seems Time.zone.todayalso works.
它似乎Time.zone.today也有效。
回答by Tyler Rick
If you want to get "today" in some specified time zone without having to change Time.zone, I would do something like fl00r and Dylan Markow suggested:
如果你想在某个指定的时区获得“今天”而不必更改Time.zone，我会做类似 fl00r 和 Dylan Markow 建议的事情：
Time.now.in_time_zone('Melbourne').to_date
or this:
或这个：
Time.find_zone!('Melbourne').today
I wrote a little helper method Date.today_in_zonethat makes getting a "today" Datefor a time zone even easier:
我编写了一个小助手方法Date.today_in_zone，可以Date更轻松地获取时区的“今天” ：
# Defaults to using Time.zone
> Date.today_in_zone
=> Fri, 26 Oct 2012
# Or specify a zone to use
> Date.today_in_zone('Melbourne')
=> Sat, 27 Oct 2012
I think it reads a little nicer than Time.find_zone!('Melbourne').today...
我觉得它读起来比Time.find_zone!('Melbourne').today……好一点
To use it, just throw this in a file like 'lib/date_extensions.rb'and require 'date_extensions'.
要使用它，只需将其放入像'lib/date_extensions.rb'and 之类的文件中即可require 'date_extensions'。
class Date
def self.today_in_zone(zone = ::Time.zone)
::Time.find_zone!(zone).today
end
end
回答by fl00r
use DateTimeclass
使用DateTime类
DateTime.now.in_time_zone 'Melbourne'
回答by mmattke
For valid timezone names, checkout: http://api.rubyonrails.org/classes/ActiveSupport/TimeZone.html
对于有效的时区名称，请查看：http: //api.rubyonrails.org/classes/ActiveSupport/TimeZone.html
回答by Max Williams
ruby-1.9.2-p0 :004 > Time.now
=> 2011-05-19 15:46:45 +0100
ruby-1.9.2-p0 :006 > Time.now.in_time_zone('Melbourne')
=> Fri, 20 May 2011 00:47:00 EST +10:00
ruby-1.9.2-p0 :007 > Time.now.in_time_zone('Melbourne').to_date
=> Fri, 20 May 2011
回答by Slobodan Kovacevic
In Rails 3 you can simply do this by calling to_time_in_current_zone on a Date object.
在 Rails 3 中，您可以通过在 Date 对象上调用 to_time_in_current_zone 来简单地做到这一点。
Date.today.to_time_in_current_zone
