本文介绍了ROR + TodayDate以UTC格式的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如果我有 @today = Date.today.to_s ，那么如何将 @today转换为UTC （仅适用日期）？
这里我只需要日期例如2011-03-08即08年3月08日。请建议一下？
If I have @today = Date.today.to_s, how do I convert @today into UTC (with the appropriate date only)?Here I need is only date for example 2011-03-08 ie 08 March 2011. Please suggest something ?
急性我正在寻找昨天的日期？
Acutally I am looking for Yesterday date ??
推荐答案
您需要将其转换为时间或者直接使用时间），然后调用 Time＃utc ：
You'll need to convert it to a Time object (or just use Time anyway) and then call Time#utc:
irb > Time.now
=> Tue Mar 08 15:32:36 +1100 2011
irb > Time.now.utc
=> Tue Mar 08 04:32:40 UTC 2011
然后您可以格式化，但需要它： / p>
You can then format it however you need it:
irb > @today = Time.now.utc
=> Tue Mar 08 04:34:25 UTC 2011
irb > @today.strftime("%Y-%m-%d")
=> "2011-03-08"
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