Ruby on rails 如何从rails中创建的数据库中选择数据

如何从今天在rails中创建的数据库中选择数据

例如：

[#<Event id: 1, customer_id: 1, therapist_id: 1, location_id: 1, service_id: 3, walkin: true, cancel: false, cancel_reason: nil, room_id: 5, starts_at: "2014-04-03 21:31:13", stops_at: nil, created_at: "2014-04-14 10:13:52", updated_at: "2014-04-14 10:13:52">, #<Event id: 2, customer_id: 2, therapist_id: 2, location_id: 2, service_id: 2, walkin: false, cancel: false, cancel_reason: nil, room_id: 1, starts_at: "2014-04-05 21:31:13", stops_at: nil, created_at: "2014-04-14 10:13:52", updated_at: "2014-04-14 10:13:52">, #<Event id: 3, customer_id: 1, therapist_id: 2, location_id: 1, service_id: 1, walkin: false, cancel: false, cancel_reason: nil, room_id: 5, starts_at: "2014-04-07 21:31:13", stops_at: nil, created_at: "2014-04-14 10:13:52", updated_at: "2014-04-14 10:13:52">, #<Event id: 4, customer_id: 2, therapist_id: 2, location_id: 2, service_id: 2, walkin: false, cancel: false, cancel_reason: nil, room_id: 1, starts_at: "2014-04-09 21:31:13", stops_at: nil, created_at: "2014-04-14 10:13:52", updated_at: "2014-04-14 10:13:52">, #<Event id: 5, customer_id: 14, therapist_id: 2, location_id: 2, service_id: 1, walkin: true, cancel: false, cancel_reason: "", room_id: 8, starts_at: "2014-04-15 06:47:00", stops_at: "2014-04-15 07:47:00", created_at: "2014-04-15 06:47:14", updated_at: "2014-04-15 06:47:14">]

当我收集今天创建的数据时，我得到的结果是：

<Event id: 5, customer_id: 14, therapist_id: 2, location_id: 2, service_id: 1, walkin: true, cancel: false, cancel_reason: "", room_id: 8, starts_at: "2014-04-15 06:47:00", stops_at: "2014-04-15 07:47:00", created_at: "2014-04-15 06:47:14", updated_at: "2014-04-15 06:47:14">

如何在rails中创建数据的地方收集所有数据

谢谢你

Event.where('created_at >= ?', Date.today)

也许您可以将创建的\u at解析为相同的短格式并进行比较，但这应该足够了。

要获取今天的事件，它将只返回今天的事件

以下是我在控制台中尝试的内容

2.0.0p247 :008 > Article.where("created_at < ?", Date.today)
  Article Load (0.5ms)  SELECT `articles`.* FROM `articles` WHERE (created_at < '2014-04-15')
 => #<ActiveRecord::Relation [#<Article id: 2, title: "Villa Kerylos: A Greek Dream.. A Modern Villa", description: "An inside look at one of the Mediterranean's most i...", url: "http://frenchantiques.blogspot.com/2009/05/villa-ke...", is_open_in_new_window: true, created_at: "2013-12-26 07:03:17", updated_at: "2013-12-26 10:28:36">, #<Article id: 4, title: "Kenzo Auctions Personal Art Collection", description: "Kenzo Auctions Personal Art Collection", url: "http://frenchantiques.blogspot.com/2009/06/kenzo-au...", is_open_in_new_window: false, created_at: "2013-12-26 09:57:21", updated_at: "2013-12-26 09:57:21">]> 

---

请尝试使用此代码

Event.where("created_at >= ? and created_at <= ?", Time.now.beginning_of_day, Time.now.end_of_day)

请试试这个：

Event.where("DATE(created_at) = DATE(?)", Time.now)

---

Event.wherecreated_at>？Time.now.to_date.to_时间应该有效，因为您需要今天的条目。另外，一个好主意是过去24小时的时间，应该是Event.wherecreated_at>？-60*60*24和created_at<？时间。现在

这不可能起作用，因为他在创建时有一个时间对象。它起作用了，你可以在你这边测试它，请不要无缘无故地否决投票。好的。你是对的。我用常用的ruby代码尝试过：if Time.now>Date.today为真，否则为假。它不起作用。很抱歉，我对你的帖子投了赞成票。在正常的时间里，每天都没有这样的功能-class@user3383458检查此链接@RSB我已检查时间。现在。一天的开始。它返回2014-04-15 12:47:24+0200:Time NoMethodError的“未定义的方法开始日期”。。。此函数用于DateTime2.0.0p247:018>Time.now.Start\u of_day=>2014-04-15 00:00:00+0530@user3383458，Time.now.一天的开始应该有用。。奇怪的是，这对你来说不起作用。

Event.where("DATE(created_at) = DATE(?)", Time.now)