Ruby on Rails：按月分组博客帖子 [英] Ruby on Rails: grouping blog posts by month

问题描述

小伙子。我创建了一个简单的博客应用程序与通常的CRUD操作。我还在PostController中添加了一个新的动作，名为archive和一个关联的视图。在这种观点下，我想把所有的博客帖子都带回来，并按月分组，以这种格式显示：

  March 
< ul> 
< li> Hello World< / li> 
< li> Blah blah< / li> 
< li>无法看到这里< / li> 
< li>测试帖子...< / li> 
< / ul> 
 
 Febuary 
< ul> 
< li>我的宿醉吸吮< / li> 
 ...等... 
  

我不能为我的生活出最好的方法来做到这一点。假设Post模型具有通常的标题，内容， created_at 等字段，有人可以帮我出来的逻辑/代码？我很喜欢RoR，所以请与我保持联系：）

解决方案

group_by是一个很好的方法：

控制器：

  def archive 
 #this将返回一个哈希，其中月份名称是键
＃，值为属于这些月份的帖子的数组
 #something like：
＃{February=> [＃< Post 0xb5c836a0>，＃< Post 0xb5443a0>]，
＃'March'=> [＃< Post 0x43443a0>]} 
 @posts_by_month = Posts.find（：all）.group_by {| post | post.created_at.strftime（％B）} 
 end 
  

查看模板： / p>

 <％@ posts_by_month.each do | monthname，posts | ％GT; 
<％= monthname％> 
< ul> 
<％posts.each do | post | ％GT; 
< li><％= post.title％>< / li> 
<％end％> 
< / ul> 
<％end％> 
  

Hy guys. I've created a simple blog app with the usual CRUD actions. I've also added a new action in the PostController called "archive" and an associated view. In this view I want to bring back all blog posts and group them by month, displaying them in this kind of format:

March
<ul>
    <li>Hello World</li>
    <li>Blah blah</li>
    <li>Nothing to see here</li>
    <li>Test post...</li>
</ul>

Febuary
<ul>
    <li>My hangover sucks</li>
    ... etc ...

I can't for the life of me figure out the best way to do this. Assuming the Post model has the usual title, content, created_at etc fields, can someone help me out with the logic/code? I'm very new to RoR so please bear with me :)

解决方案

group_by is a great method:

controller:

def archive
  #this will return a hash in which the month names are the keys, 
  #and the values are arrays of the posts belonging to such months
  #something like: 
  #{ "February" => [#<Post 0xb5c836a0>,#<Post 0xb5443a0>],
  # 'March' => [#<Post 0x43443a0>] }
  @posts_by_month = Posts.find(:all).group_by { |post| post.created_at.strftime("%B") }
end

view template:

<% @posts_by_month.each do |monthname, posts| %>
<%= monthname %>
<ul>
   <% posts.each do |post| %>
     <li><%= post.title %></li>
   <% end %>
</ul>
<% end %>

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