轨道按日期查找笔记 [英] Rails finding notes by date

问题描述

我创建了一个简单的rails应用程序，它有一个人和一个笔记模型。

人们有许多笔记和注释属于人们

该应用程序的工作原理，我可以显示特定人物的所有笔记，但我希望能够在特定日期显示一个音符。

默认情况是今天的日期。

我目前有以下：

 <％@ person.notes.each do | note | ％> 
< p> 
< h3><％= h note.title％>< / h3> 
< / p> 
 
< p>< b>正文：< / b>< br /> 
<％= h note.body％> 
  

我尝试了几种不同的方法，但无法让我向我显示今天的日期

我尝试创建一个命名范围，并失败，并尝试使用：

  @ person.notes.find_by_created_at（Time.now-1.day）
  

任何人都可以指向正确的方向吗？

谢谢

Tom

＃

我使用下面的代码，并提出了这个。

我的展示视图看起来像这样。

 < p> 
< h1><％= h @ person.name％>< / h1> 
< / p> 
 
< h2>注意< / h2> 
 
<％@ person.notes.all（：conditions => [created_at> =？，Time.now.beginning_of_day]）do | note | ％> 
< p> 
< h3><％= h note.title％>< / h3> 
< / p> 
 
< p>< b>正文：< / b>< br /> 
<％= h note.body％> 
< / p> 
 
<％end％> 
  

我认为我可能在我看来使用错误的语法，或者甚至不应该使用在视图中？

T

解决方案

根据您更新的问题，您需要迭代查询中返回的项目。

 <％@ person.notes.all（ conditions => [created_at> =？，Time.now.beginning_of_day]）。 ％> 
  

请注意，该查询确实属于某个模型，并从控制器调用; p>

编辑：既然我真的不觉得我回答了你的原始问题，我会补充一点我的答案。

你可以把你的注释模型中的查询作为命名范围。以下行：

  named_scope：今天，lambda {| date | {：conditions => [created_at> =？，Time.now.beginning_of_day]}} 
  

t测试，因为我不记得确切的语法，但是您需要使用lambda或其他的，当您的rails应用程序第一次启动时，它将插入今天的日期在那里，永远不会当对named_scope进行后续请求时更新。有关此轨道通讯的上述情况的更多信息。

在您的 PeopleController 中，您可以将其作为 @todays_notes = @ person.notes.today 然后在您的视图中使用 @ todays_notes.each do | note | 。

I've created a simple rails app that has a people and a notes model.

People have many notes and notes belong to people

The app works and I'm able to show all the notes for a specific person, but I'd like to be able to show a single note for a specific date.

The default scenario being todays date.

I currently have the following:

<% @person.notes.each do |note| %>
  <p>
    <h3><%=h note.title %></h3>
  </p>

  <p><b>Body: </b><br />
    <%=h note.body %>

I have tried several different methods but can't get any to show me a note for the date today.

I tried to create a named scope and failed with that and also tried to use:

@person.notes.find_by_created_at(Time.now-1.day)

Can anyone point me in the right direction please?

Thanks

Tom

#

I used the code from below and came up with this.

My show view looks like this.

<p>
  <h1><%=h @person.name %></h1>
</p>

<h2>Notes</h2>

<% @person.notes.all(:conditions=> ["created_at >= ? ", Time.now.beginning_of_day]) do |note| %>
  <p>
    <h3><%=h note.title %></h3>
  </p>

  <p><b>Body: </b><br />
    <%=h note.body %>
  </p>

<% end %>

I think I may be using the wrong syntax in my view, or should possibly not even be using this in the view?

T

解决方案

Based on your updated question, you need to iterate over the items that are returned from your query.

<% @person.notes.all(:conditions=> ["created_at >= ? ", Time.now.beginning_of_day]).each do |note| %>

Mind you, that query really does belong in a model somewhere and called from a controller ;)

Edit: Since I don't really feel like I answered your original question, I'll add to my answer a little bit.

You could definitely put that query in your Note model as a named scope. Something along the lines of:

named_scope :today, lambda { |date| { :conditions => ["created_at >= ? ", Time.now.beginning_of_day] } }

The above isn't tested as I don't remember the exact syntax, but you'll need to use a lambda or else when your rails app starts for the first time, it will insert today's date in there and never be updated when subsequent requests to the named_scope are made. There's more information on the above situation in this railscast.

In your PeopleController you could fetch them as @todays_notes = @person.notes.today and then iterate over them in your view with @todays_notes.each do |note|.

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