有效的 Model DateTIme 類型

表示日期和時間的屬性類型。它註冊在 :datetime 鍵下。

class Event
  include ActiveModel::Attributes

  attribute :start, :datetime
end

event = Event.new
event.start = "Wed, 04 Sep 2013 03:00:00 EAT"

event.start.class # => Time
event.start.year  # => 2013
event.start.month # => 9
event.start.day   # => 4
event.start.hour  # => 3
event.start.min   # => 0
event.start.sec   # => 0
event.start.zone  # => "EAT"

字串 值使用 ISO 8601 日期時間格式來解析。也接受不完整僅限時間的格式。

event.start = "06:07:08+09:00"
event.start.utc # => 1999-12-31 21:07:08 UTC

在宣告屬性時可以自訂次秒精準度。

class Event
  include ActiveModel::Attributes

  attribute :start, :datetime, precision: 4
end