取一个Rails的ActiveRecord“日期时间”属性作为DateTime对象

问题描述：

我在我的模型，其中包含一个日期/时间值之一的属性，并使用 t.datetime声明：ended_on 在我的迁移

I have an attribute in one of my models that contains a Date/Time value, and is declared using t.datetime :ended_on in my migrations.

当我取使用这个值 myevent.ended_on ，我收到了时间对象。问题是，当我尝试使用这个属性作为轴线的舰队的图表，这是行不通的正常，因为舰队只能识别日期为日期或的DateTime 的对象。

When I fetch this value using myevent.ended_on, I get a Time object. The problem is that when I try to use this attribute as an axis in a Flotilla chart, it doesn't work properly because Flotilla only recognizes dates as Date or DateTime objects.

我想过写一个虚拟属性，将现有的时间值转换为DateTime，但我警惕这样做的，因为我听说，时间不能超过2040后处理日期，和我不'牛逼想冒险创造一个2040错误后话了担心。

I thought about writing a virtual attribute that will convert the existing Time value to a DateTime, but I'm wary of doing this, since I've heard that Time can't handle dates later than 2040, and I don't wish to risk creating a "2040 bug" to worry about later.

有没有什么办法可以说服的ActiveRecord返回datetime对象为这个属性，而不是时间的物体？

Is there any way I can persuade ActiveRecord to return DateTime objects for this attribute instead of Time objects?

答

您可以随时创建一个方法来重写属性，如下：

You can always create a method to override the attribute, as follows:

class YourModel

  ....

  def ended_on
    self['ended_on'].to_datetime # if you need date object use to_date instead
  end

  ....
end

希望帮助

取一个Rails的ActiveRecord“日期时间”属性作为DateTime对象

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