获取Rails ActiveRecord'datetime'属性作为DateTime对象 [英] Fetch a Rails ActiveRecord 'datetime' attribute as a DateTime object

问题描述

我在我的一个模型中有一个属性，其中包含一个日期/时间值，并在我的迁移中使用 t.datetime：ended_on 声明。

当我使用 myevent.ended_on 获取这个值时，我得到一个时间对象。问题是，当我尝试在 Flotilla 图表中将此属性用作轴时，它不会工作正常，因为Flotilla只识别日期为 Date 或 DateTime 对象。

$ b $我想过写一个虚拟属性，将现有的Time值转换为DateTime，但是我很担心这样做，因为我听说Time不能在2040年以后才能处理日期，不要冒险创造一个2040错误，以后担心。

有没有办法我可以说服ActiveRecord返回此属性的DateTime对象而不是Time对象

解决方案

您可以随时创建一个覆盖属性的方法，如下所示：

  class YourModel 
 
 .... 
 
 def ends_on 
 self ['ended_on'] to_datetime ＃如果你需要日期对象使用to_date而不是
结束
 
 .... 
 end 
  

希望有帮助

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.

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.

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.

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

解决方案

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

Hopefully that helps

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