在两个日期之间查找记录的Ruby查询在控制台中工作，但不在视图中

Question

尝试使用他们的@ event.date显示一些记录（在应用中名为Event的模型）以组织它们。

在控制台中，我能看到他们在运行此：

Event.where(:date => DateTime.now.next_week..DateTime.now.next_week.end_of_week) 

导致控制台

Event Load (0.5ms) SELECT "events".* FROM "events" WHERE ("events"."date" BETWEEN '2015-08-16 22:00:00.000000' AND '2015-08-23 21:59:59.000000') 
=> #<ActiveRecord::Relation [#<Event id: 1, name: "My BBQ", description: "A BBQ with friends", city: "Brussels", accepted: 0, date: "2015-08-21", created_at: "2015-08-15 11:06:54", updated_at: "2015-08-15 11:06:54">, #<Event id: 6, name: "BBQ on the 20", description: "Because weekly bbq", city: "Brussels", accepted: 0, date: "2015-08-20", created_at: "2015-08-15 11:56:09", updated_at: "2015-08-15 11:56:09">, #<Event id: 8, name: "Birthday BBQ", description: "Because yes", city: "Brussels", accepted: 0, date: "2015-08-19", created_at: "2015-08-15 12:17:19", updated_at: "2015-08-15 12:17:19">, #<Event id: 5, name: "Sunday BBQ", description: "It will rain", city: "Brussels", accepted: 0, date: "2015-08-17", created_at: "2015-08-15 11:46:44", updated_at: "2015-08-15 12:21:15">, #<Event id: 9, name: "Test BBQ", description: "Testing", city: "Brussels", accepted: 0, date: "2015-08-23", created_at: "2015-08-15 12:34:33", updated_at: "2015-08-15 12:34:33">, #<Event id: 10, name: "Test num 2", description: "", city: "Brussels", accepted: 0, date: "2015-08-22", created_at: "2015-08-15 12:35:23", updated_at: "2015-08-15 12:35:23">]> 
irb(main):051:0> 

在那里我想呈现什么输出控制台有视图此代码：

<% @events.each do |event| %> 

     <% if event.date === DateTime.now.next_week..DateTime.now.next_week.end_of_week %> 
      <% if event.accepted == 0 %> 
       <div class="row eventrow"> 
        <span class="eventlikes">↑9</span> 
        <a href="/events/<%= event.id %>"><span class="eventtitle"><%= event.name %> | <%= event.city %></span></a> On <%= event.date %> 
        <div class="eventgoers right"> 
        <span class="">Submitted by</span><img src="http://i.imgur.com/Lpavq5s.png?1" class="individualeventgoer"> 
        </div> 
       </div> 
      <% else %> 
       <div class="row eventrow red"> 
        <span class="eventlikes">↑9</span> 
        <a href="/events/<%= event.id %>"><span class="eventtitle"><%= event.name %> | <%= event.city %></span><span class="">Only visible to admin</span></a>On <%= event.date %> 
        <div class="eventgoers right"> 
        <span class="">Submitted by</span><img src="http://i.imgur.com/Lpavq5s.png?1" class="individualeventgoer"> 
        </div> 
       </div> 
      <% end %> 
     <% else %> 
     no events 
     <% end %> 

    <% end %> 

但在最后一个视图中，我只设法得到1显示，为什么？

注意，我也尝试添加一个 ''查询如：

Event.where（：date => DateTime.now.next_week ... DateTime.now.next_week.end_of_week），但结果仍然不是视图中的预期结果。

在控制台对于上次查询我得到：

irb(main):051:0> Event.where(:date => DateTime.now.next_week...DateTime.now.next_week.end_of_week) 
    Event Load (0.5ms) SELECT "events".* FROM "events" WHERE ("events"."date" >= '2015-08-16 22:00:00.000000' AND "events"."date" < '2015-08-23 21:59:59.000000') 
=> #<ActiveRecord::Relation [#<Event id: 1, name: "My BBQ", description: "A BBQ with friends", city: "Brussels", accepted: 0, date: "2015-08-21", created_at: "2015-08-15 11:06:54", updated_at: "2015-08-15 11:06:54">, #<Event id: 6, name: "BBQ on the 20", description: "Because weekly bbq", city: "Brussels", accepted: 0, date: "2015-08-20", created_at: "2015-08-15 11:56:09", updated_at: "2015-08-15 11:56:09">, #<Event id: 8, name: "Birthday BBQ", description: "Because yes", city: "Brussels", accepted: 0, date: "2015-08-19", created_at: "2015-08-15 12:17:19", updated_at: "2015-08-15 12:17:19">, #<Event id: 5, name: "Sunday BBQ", description: "It will rain", city: "Brussels", accepted: 0, date: "2015-08-17", created_at: "2015-08-15 11:46:44", updated_at: "2015-08-15 12:21:15">, #<Event id: 10, name: "Test num 2", description: "", city: "Brussels", accepted: 0, date: "2015-08-22", created_at: "2015-08-15 12:35:23", updated_at: "2015-08-15 12:35:23">]> 
irb(main):052:0> 

在查看

而且只有记录 - 任何帮助理解为什么发生这种情况？

Answer 1

看来你不明白===运营商做。通过使用...你改变你的DateTime对象Range对象：

(DateTime.now.next_week..DateTime.now.next_week.end_of_week).class 
# => Range 

然后你想比较您范围内event.date对象：

<% if event.date === DateTime.now.next_week..DateTime.now.next_week.end_of_week %> 

当然，它返回你false，因为任何日期实例不能等于任何范围实例。您应该使用Range#cover?方法来检查因素在于进入范围：

if (DateTime.now.next_week..DateTime.now.next_week.end_of_week).cover?(event.date)