I have date as "Wed, 29 Jun 2016" and time in "11:35 PM" format
how can i create a date time object with it?
something like what Time.current does.
It's usually pretty simple if your date can be parsed:
DateTime.parse("Wed, 29 Jun 2016 11:35 PM")
# => Wed, 29 Jun 2016 23:35:00 +0000
You can then use that in any capacity you'd use any other date/time.
Why you don't use next:
Time.parse('Wed, 29 Jun 2016 11:35 PM')
=> 2016-06-29 23:35:00 +0300
Related
Event model which has start and end datetime attributes in the database. I want to seed some random events but the event time should be proper.
For example:
6.times { date_range << DateTime.now + (rand * 21) }
generates
[Thu, 03 Aug 2017 21:22:48 +0530,
Tue, 08 Aug 2017 17:36:29 +0530,
Sat, 29 Jul 2017 06:19:51 +0530,
Sat, 29 Jul 2017 13:36:21 +0530,
Thu, 27 Jul 2017 15:08:55 +0530,
Fri, 04 Aug 2017 13:53:03 +0530]
which is the correct behaviour.
But how to generate random datetime like this:
[Thu, 03 Aug 2017 21:00:00 +0530,
Tue, 08 Aug 2017 17:30:00 +0530,
Sat, 29 Jul 2017 06:00:00 +0530,
Sat, 29 Jul 2017 13:00:00 +0530,
Thu, 27 Jul 2017 15:30:00 +0530,
Fri, 04 Aug 2017 13:00:00 +0530]
So in order to display these events properly on a calendar.
Could try separating out each segment and adding them onto the date individually
date_range = 6.times.collect do
DateTime.now.beginning_of_day + # starting from today
rand(21).days + # pick a random day, no further than 3 weeks out
rand(24).hours + # move forward to a random hour on that day
(rand(2) * 30).minutes # and then decide whether to add 30 minutes
end
or, could combine the hours + minutes
date_range = 6.times.collect do
DateTime.now.beginning_of_day + # starting from today
rand(21).days + # pick a random day, no further than 3 weeks out
(rand(48) * 30).minutes # pick a random interval of 30 minutes to add in
end
Found the working solution but not complete:
6.times { date_range << DateTime.parse((DateTime.now + (rand * 21)).beginning_of_hour.to_s) }
[Mon, 31 Jul 2017 06:00:00 +0530,
Thu, 03 Aug 2017 15:00:00 +0530,
Fri, 11 Aug 2017 14:00:00 +0530,
Mon, 31 Jul 2017 09:00:00 +0530,
Wed, 09 Aug 2017 16:00:00 +0530,
Sat, 12 Aug 2017 13:00:00 +0530]
This can work for now but need some datetime with 30 minutes as well.
I received a time string from a server and I want to parse or convert that string to configured time zone (Tokyo timezone in my case):
Input: "2016-05-27T09:00:00.0000000"
Expected output: Fri, 27 May 2016 18:00:00 JST +09:00
I try to type like this: Time.zone.parse("2016-05-27T09:00:00.0000000") but it returns unexpected output: Fri, 27 May 2016 09:00:00 JST +09:00
If the parsed datetime is a UTC time, add the UTC timezone explicitly to it before parsing:
# this parses the time as local time:
Time.zone.parse("2016-05-27T09:00:00.0000000")
# => Fri, 27 May 2016 09:00:00 JST +09:00
# this parses the time as UTC and converts to local time:
Time.zone.parse("2016-05-27T09:00:00.0000000Z")
# => Fri, 27 May 2016 18:00:00 JST +09:00
Note the "Z" appended to the datetime string, meaning that this is a datetime in UTC timezone.
My db is by default storing times as such:
Object.last.created_at
# => Fri, 03 Jul 2015 23:27:50 UTC +00:00
I looked at the strftime docs and I can build that myself, but it seems there must be an easy way to get a regular Date object to that format? Just wondering if there is...
to_datetime gets really close, but not exactly all the way there.
Date.today.to_datetime
# => Sat, 04 Jul 2015 00:00:00 +0000
Any other ideas?
Try this
Time.zone.now
#=> Sat, 04 Jul 2015 20:32:44 UTC +00:00
UPDATE
DateTime.now.in_time_zone
#=> Sat, 04 Jul 2015 20:43:57 UTC +00:00
Oh silly me... it's just
Date.today.in_time_zone
# => Mon, 06 Jul 2015 00:00:00 UTC +00:00
We're in the timezone Bern, which is +0100. But since we're now in summertime (we have daylight saving time), the current offset is +0200. In my rails app, I set the timezone using a wrapper in the application controller since I need to have user-based timezones:
around_filter :user_timezone
def user_timezone(&block)
Time.use_zone(current_timezone, &block)
end
Now the strange part:
Time.zone.now # 2013-04-10 10:32:56 +0200
# (correct offset)
SomeArModel.first.created_at # 2013-03-28 17:49:59 +0100
# (incorrect offset, no DST)
Is there any explanation for this?
Thats normal behavior, the DST change happened on Sun Mar 31 01:00:00 UTC 2013.
t = Time.mktime(2013, 03, 31, 1, 15, 0)
6.times do
t += 900
u = Time.at(t.to_i).utc
puts t.to_s + " " + u.to_s
end
output:
Sun Mar 31 01:30:00 +0100 2013 Sun Mar 31 00:30:00 UTC 2013
Sun Mar 31 01:45:00 +0100 2013 Sun Mar 31 00:45:00 UTC 2013
Sun Mar 31 03:00:00 +0200 2013 Sun Mar 31 01:00:00 UTC 2013
Sun Mar 31 03:15:00 +0200 2013 Sun Mar 31 01:15:00 UTC 2013
Sun Mar 31 03:30:00 +0200 2013 Sun Mar 31 01:30:00 UTC 2013
Sun Mar 31 03:45:00 +0200 2013 Sun Mar 31 01:45:00 UTC 2013
how can I get a variable which is holding always Today midnight in my timezone?
The hosting server is several hours behind me, both Time.now.midnight and Date.today are on yesterday date for good part of the day.
Thanks
Found the solution.
now=DateTime.now
=> Fri, 03 Feb 2012 21:57:21 EST -05:00
now.in_time_zone('London').midnight
=> Sat, 04 Feb 2012 00:00:00 GMT +00:00
now.in_time_zone('Hawaii').midnight
=> Fri, 03 Feb 2012 00:00:00 HST -10:00