"Ago" Date/Time Functions in Ruby/Rails

Ago date/time functions in Ruby/Rails

You can use:

10.minutes.ago
2.days.since

Or in your views you have the helpers:

distance_of_time_in_words(from_time, to_time)
time_ago_in_words(from_time)

Check the API for details and more options.

How to get time x days ago from a specific date in Rails?

Try this:

> DateTime.now-2.days
=> Wed, 18 May 2016 21:40:31 -0700

Get time ago from an date that is saved as a string. ruby rails

The easiest way if you want to avoid doing a bunch of math is by using ActiveSupport::Duration.

irb(main):001:0> time = Time.zone.parse("2019-12-09T11:06:37.000Z")
=> Mon, 09 Dec 2019 11:06:37 UTC +00:00
irb(main):002:0> duration = ActiveSupport::Duration.build(Time.zone.now - time)
=> 1 day, 11 hours, 10 minutes, and 31.248518 seconds
irb(main):003:0> duration.parts
=> {:days=>1, :hours=>11, :minutes=>10, :seconds=>31.248518}

Display datetime like 1 hour ago, 5 hours ago, 3 days ago,

http://api.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html#method-i-distance_of_time_in_words

Ruby Date 1 month ago to String

Try this:

require 'date'

d = Date.today.prev_month # or Date.today.next_month, depending what you want
 => #<Date: 2014-12-27 ((2457019j,0s,0n),+0s,2299161j)> 
d.strftime("%FT%T")
 => "2014-12-27T00:00:00"

Time ago in created_at?

http://api.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html#method-i-time_ago_in_words

so it should be

<%= time_ago_in_words(comment.created_at) %>

Rails: How I can get yesterday's date?

Rails

For a date object you could use:

Date.yesterday

Or a time object:

1.day.ago

Ruby

Or outside of rails:

require 'date'

Date.today.prev_day