在 Rails 中，如何以可与 ActiveSupport::TimeZone[zone].parse() 一起使用的格式获取当前时区 (Time.zone)? [英] In Rails, how get current time zone (Time.zone) in a format that can be used with ActiveSupport::TimeZone[zone].parse()?

问题描述

方法如何获取当前 Time.zone 并将其转换为 ActiveSupport::TimeZone[some_zone].parse() 可用的格式?

How can a method take the current Time.zone and put it into a format that is usable by ActiveSupport::TimeZone[some_zone].parse()?

Time.zone.to_s 返回一个不能与ActiveSupport::TimeZone[zone].parse()

It seems very strange that Time.zone.to_s returns a string that can not be used with ActiveSupport::TimeZone[zone].parse()

Time.zone.to_s 返回 "(GMT-08:00) 太平洋时间(美国和加拿大)"

但是 ActiveSupport::TimeZone["(GMT-08:00) 太平洋时间(美国和加拿大)"] 是 nil.

ActiveSupport::TimeZone["(GMT-08:00) Pacific Time (US & Canada)"]
=> nil

ActiveSupport::TimeZone["Pacific Time (US & Canada)"]
=> (GMT-08:00) Pacific Time (US & Canada)

推荐答案

使用 Time.zone.name，而不是 Time.zone.to_s

[1] pry(main)> Time.zone.to_s
=> "(GMT-05:00) Eastern Time (US & Canada)"
[2] pry(main)> Time.zone.name
=> "Eastern Time (US & Canada)"
[3] pry(main)> ActiveSupport::TimeZone[Time.zone.name]
=> (GMT-05:00) Eastern Time (US & Canada)

<小时>

至于我如何得到这个(根据要求)，我只知道 name 方法存在于 Time.zone 上.如果我不知道这一点，我会检查文档.如果它不像你说的那样在那里(它是，这里)，我通常使用 Pry 检查类/模块/对象.Pry 是 irb 的替代品，它让我可以做类似

---

As for how I got this (as requested), I just know the name method exists on Time.zone. If I didn't know this by heart though, I will check the docs. If it's not in there as you say (and it is, here), I typically inspect the class/module/object with Pry. Pry is an alternative to irb that lets me do something like

[1] pry(main)> cd Time.zone
[2] pry(#<ActiveSupport::TimeZone>):1> ls -m
Comparable#methods: <  <=  ==  >  >=  between?
ActiveSupport::TimeZone#methods: <=>  =~  at  formatted_offset  local  local_to_utc  name  now  parse  period_for_local  period_for_utc  to_s  today  tzinfo  utc_offset  utc_to_local
self.methods: __pry__
[3] pry(#<ActiveSupport::TimeZone>):1> name
=> "Eastern Time (US & Canada)"

ls -m 上面的 [2] 行打印对象上的方法(如果向右滚动，您将看到 name 在那里列出).您可以在 [3] 中看到我可以直接在我所在的 Time.zone 对象上调用 name 并获得输出正在寻找.

ls -m on line [2] above prints methods on the object (if you scroll right you'll see name listed there). You can see in [3] I can call name directly on the Time.zone object I'm inside of and get the output you're looking for.

这篇关于在 Rails 中，如何以可与 ActiveSupport::TimeZone[zone].parse() 一起使用的格式获取当前时区 (Time.zone)?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！