如何在Ruby中生成随机日期？ [英] How to generate a random date in Ruby?

问题描述

我的Rails 3应用程序中有一个模型，它有一个日期字段：

 code> class CreateJobs< ActiveRecord :: Migration 
 def self.up 
 create_table：jobs do | t | 
 t.datejob_date，：null =>假
 ... 
 t.timestamps 
 end 
 end 
 ... 
 end 
  

我想用随机日期值预填充我的数据库。

最简单的生成方式是什么一个随机日期？

解决方案

这是Chris的回答稍微扩展，可选的从

  def time_rand from = 0.0 ，to = Time.now 
 Time.at（from + rand *（to.to_f  -  from.to_f））
 end 
 
> time_rand 
 => 1977-11-02 04:42:02 0100 
> time_rand Time.local（2010,1,1）
 => 2010-07-17 00:22:42 0200 
> time_rand Time.local（2010,1,1），Time.local（2010,7,1）
 => 2010-06-28 06:44:27 0200 
  




I have a model in my Rails 3 application which has a date field:

class CreateJobs < ActiveRecord::Migration
  def self.up
    create_table :jobs do |t|
      t.date "job_date", :null => false
      ...
      t.timestamps
    end
  end
  ...
end

I would like to prepopulate my database with random date values.

What is the easiest way to generate a random date ?

解决方案

Here's a slight expansion on Chris' answer, with optional from and to parameters:

def time_rand from = 0.0, to = Time.now
  Time.at(from + rand * (to.to_f - from.to_f))
end

> time_rand
 => 1977-11-02 04:42:02 0100 
> time_rand Time.local(2010, 1, 1)
 => 2010-07-17 00:22:42 0200 
> time_rand Time.local(2010, 1, 1), Time.local(2010, 7, 1)
 => 2010-06-28 06:44:27 0200 

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