给定一个时间戳，如何确定几周前？(Given a timestamp, how to determine how many weeks ago?)

给定一个时间戳，如何确定几周前？(Given a timestamp, how to determine how many weeks ago?)

我希望返回自我的应用程序中创建用户以来的周数。

我的模型是User.rb（id，created_at）

给定user.created_at ：

2.4.0 :008 > user.created_at => Mon, 14 Aug 2017 15:51:23 UTC +00:00

我该怎么做： user.created_at.weeks_ago

返回的是一些整数，表示自用户创建以来的周数？

谢谢

I'm looking to return the number of weeks since a user was created in my app..

My model is User.rb (id, created_at)

Given user.created_at:

2.4.0 :008 > user.created_at => Mon, 14 Aug 2017 15:51:23 UTC +00:00

How can I do something like: user.created_at.weeks_ago where it returns some integer which represents the number of weeks since the user was created?

最满意答案

如果您只想构建一个人性化的字符串，我相信time_ago_in_words就是您所追求的。

https://apidock.com/rails/ActionView/Helpers/DateHelper/time_ago_in_words

否则，我会采取以下措施：

(Time.new - user.created_at) / 1.week

如果你想要一个更优雅的解决方案， 在Ruby中减去日期，并在几分钟内得到差异，提到Ruby的时差宝石 。

例如

TimeDifference.between(user.created_at.to_time, Time.now).in_weeks

If you just want to build a human-friendly string, I believe time_ago_in_words is what you are after.

https://apidock.com/rails/ActionView/Helpers/DateHelper/time_ago_in_words

Otherwise, I would resort to something like the following:

(Time.new - user.created_at) / 1.week

If you want a more elegant solution, Subtract dates in Ruby and get the difference in minutes mentions the Time Difference gem for Ruby.

e.g.

TimeDifference.between(user.created_at.to_time, Time.now).in_weeks