рельсы [шаблон + частичный] приводит к повторному выводу!

Question

Что на земле?

В сообщениях / _post_brief.html.haml:

- title link_to "#{post_brief.title} by #{post_brief.user.full_name}", post_brief

- content_for :info do
    - if post_brief.tags.count > 0
        Tags: #{post_brief.tags.collect {|t| t.name}.join(", ")}

- content_for :post_body do
    =post_brief.message

В posts / _post_wrapper.html.haml:

.post
  .right
    %h2= yield :title
    %p.post-info= yield :info
    = yield :post_body
  .left
    %p.dateinfo
      JAN
      %span 31
    .post-meta
      %h4 Playlist Info
      %ul
        %li.user
          %a{:href => "#"} Erwin
        %li.time
          %a{:href => "#"} 12:30 PM
        %li.comment
          %a{:href => "#"} 2 Comments
        %li.permalink
          %a{:href => "#"} Permalink

В posts / index.html.haml:

- title "Posts"

- content_for :info do
    Lots of posts here!

- content_for :main_content do
    -# @posts.each do |post|
    = render :partial => "post_brief", :layout => "post_wrapper", :collection => @posts

    = link_to 'New post', new_post_path

В раскладках / application.html.erb (только соответствующая часть)

<div id="main">
  <%= yield(:main_content) or yield %>
</div>

Результатом является следующий HTML:

<div class='post'>

  <div class='right'>
    <h2><a href="/posts/545688642">Love Potion No. 23 by John Smith</a></h2>
    <p class='post-info'>Lots of posts here!</p>
    The  is such a flawed product!
    This potion, Love Potion No. 7, is defective!
    This potion, Love Potion No. 25, is defective!
    This potion, Love Potion No. 13, is defective!
    This potion, Love Potion No. 17, is defective!
    This potion, Love Potion No. 3, is defective!
    This potion, Love Potion No. 21, is defective!
    This potion, Love Potion No. 4, is defective!
    This potion, Love Potion No. 10, is defective!
    This potion, Love Potion No. 14, is defective!
    This potion, Love Potion No. 22, is defective!
    This potion, Love Potion No. 8, is defective!
    This potion, Love Potion No. 18, is defective!
    This potion, Love Potion No. 1, is defective!
    This potion, Love Potion No. 23, is defective!
  </div>
  <div class='left'>
    <p class='dateinfo'>
      JAN
      <span>31</span>

    </p>
    <div class='post-meta'>
      <h4>Playlist Info</h4>
      <ul>
        <li class='user'>
          <a href='#'>Erwin</a>
        </li>
        <li class='time'>

          <a href='#'>12:30 PM</a>
        </li>
        <li class='comment'>
          <a href='#'>2 Comments</a>
        </li>
        <li class='permalink'>
          <a href='#'>Permalink</a>

        </li>
      </ul>
    </div>
  </div>
</div>
<div class='post'>
  <div class='right'>
    <h2><a href="/posts/545688642">Love Potion No. 23 by John Smith</a></h2>
    <p class='post-info'>Lots of posts here!</p>

    The  is such a flawed product!
    This potion, Love Potion No. 7, is defective!
    This potion, Love Potion No. 25, is defective!
    This potion, Love Potion No. 13, is defective!
    This potion, Love Potion No. 17, is defective!
    This potion, Love Potion No. 3, is defective!
    This potion, Love Potion No. 21, is defective!
    This potion, Love Potion No. 4, is defective!
    This potion, Love Potion No. 10, is defective!
    This potion, Love Potion No. 14, is defective!
    This potion, Love Potion No. 22, is defective!
    This potion, Love Potion No. 8, is defective!
    This potion, Love Potion No. 18, is defective!
    This potion, Love Potion No. 1, is defective!
    This potion, Love Potion No. 23, is defective!
  </div>
  <div class='left'>
    <p class='dateinfo'>
      JAN
      <span>31</span>
    </p>
    <div class='post-meta'>
      <h4>Playlist Info</h4>

      <ul>
        <li class='user'>
          <a href='#'>Erwin</a>
        </li>
        <li class='time'>
          <a href='#'>12:30 PM</a>
        </li>
        <li class='comment'>

          <a href='#'>2 Comments</a>
        </li>
        <li class='permalink'>
          <a href='#'>Permalink</a>
        </li>
      </ul>
    </div>
  </div>
</div>

и так далее. (В @post есть 15 элементов; каждый из них должен иметь однострочное описание, но, как вы видите, все 15 описаний печатаются для каждого элемента.)

Я также попытался изменить index.html.haml на

- content_for :main_content do
    - @posts.each do |post|
        = render :partial => "post_brief", :layout => "post_wrapper", :locals => {:post => post}

но это вызвало еще более безумное поведение - у первой записи было одно описание, у второй - два и т. Д.

Что случилось?

Answer 1

Если вы вызываете хелпер content_for несколько раз в ходе данного рендера, он объединяет контент, а не перезаписывает его, что приводит к поведению, которое вы видите здесь. Я бы рекомендовал превратить post_brief + post_wrapper в один частичный и просто рендерить его, а не использовать частичный макет.