在Rails 4中，将当前时区中的Date转换为DateTime的最佳方法是什么？

Question

I'm using Rails 4.2. I have a Date that I'd like to convert to a DateTime . If I use the existing to_datetime method, it converts it in GMT. (I've looked at threads for about an hour now and couldn't find this exact problem so apologies in advance if it exists!)

irb(main):030:0> Date.current
=> Wed, 19 Aug 2015
irb(main):031:0> Date.current.to_datetime
=> Wed, 19 Aug 2015 00:00:00 +0000

If I then try to use in_time_zone , it converts it to the current time zone but also subtracts the offset from the date.

irb(main):032:0> Date.current.to_datetime.in_time_zone
=> Tue, 18 Aug 2015 17:00:00 PDT -07:00

How can I convert an existing Date to a DateTime in the current time zone?

Answer 1

这是我能想到的最佳答案。

Time.zone.at(Date.current.to_time).to_datetime

Answer 2

I had a similar issue, and I did this:

Time.use_zone("Europe/Berlin") do
  midnight = Time.zone.parse(@date.to_s)
end

Which basically re-creates the date as a Time instance while being in the target timezone, at midnight, without "moving" the Time instance around.

Answer 3

The accepted answer didn't work for me because Date.current.to_time converted the date to my :local timezone, which is UTC, instead of my configured timezone, which is PST.

Instead, I used Date.current.in_time_zone.to_datetime , which I found here: https://www.varvet.com/blog/working-with-time-zones-in-ruby-on-rails/