Ruby on rails 如何在“show”页面以及第二个较大的部分中呈现小部分

我有一个简单的博客应用程序

我使用部分

\u post.html.erb

在我的索引页面中呈现帖子

\u post.html.erb

有一个div

class=submission\u details

，它与我的

show

操作中使用的内容相同。 我如何将该部分拆分，以便在

\u post.html.erb

部分和

show.html.erb

页面中使用它

posts\u controller.rb

def index
  @posts = Post.all
end

def show
  @post = Post.find(params[:id])
end

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= time_ago_in_words(post.created_at) %>
  <span id="submission_details_<%= post.id %>">
  submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
  </span>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>
</div>

  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= render 'post_information', post: post %>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= render 'post_information', post: @post %>
</div>

<%= time_ago_in_words(post.created_at) %>
<span id="submission_details_<%= post.id %>">
submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
</span>

posts/index.html.erb

def index
  @posts = Post.all
end

def show
  @post = Post.find(params[:id])
end

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= time_ago_in_words(post.created_at) %>
  <span id="submission_details_<%= post.id %>">
  submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
  </span>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>
</div>

  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= render 'post_information', post: post %>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= render 'post_information', post: @post %>
</div>

<%= time_ago_in_words(post.created_at) %>
<span id="submission_details_<%= post.id %>">
submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
</span>

---

这是由

render'shared/submission\u details'

为

show

操作渲染的，但在

索引中给了我零。如何为
索引
操作正确定义@post？
在分部上，可以定义一个局部变量，渲染分部时，正确的语法为：

render(partial: 'post_information', locals: { post: @post }

但这可以缩写为

render('post_information', post: @post)

对于show操作，在部分\u post.html.erb的情况下，您的post实例不在变量@post上，而是在局部变量post上，因此您可以执行以下操作：

render('post_information', post: post)

posts/index.html.erb

def index
  @posts = Post.all
end

def show
  @post = Post.find(params[:id])
end

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= time_ago_in_words(post.created_at) %>
  <span id="submission_details_<%= post.id %>">
  submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
  </span>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>
</div>

  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= render 'post_information', post: post %>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= render 'post_information', post: @post %>
</div>

<%= time_ago_in_words(post.created_at) %>
<span id="submission_details_<%= post.id %>">
submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
</span>



posts/\u post.html.erb

def index
  @posts = Post.all
end

def show
  @post = Post.find(params[:id])
end

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= time_ago_in_words(post.created_at) %>
  <span id="submission_details_<%= post.id %>">
  submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
  </span>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>
</div>

  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= render 'post_information', post: post %>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= render 'post_information', post: @post %>
</div>

<%= time_ago_in_words(post.created_at) %>
<span id="submission_details_<%= post.id %>">
submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
</span>



posts/show.html.erb

def index
  @posts = Post.all
end

def show
  @post = Post.find(params[:id])
end

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= time_ago_in_words(post.created_at) %>
  <span id="submission_details_<%= post.id %>">
  submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
  </span>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>
</div>

  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= render 'post_information', post: post %>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= render 'post_information', post: @post %>
</div>

<%= time_ago_in_words(post.created_at) %>
<span id="submission_details_<%= post.id %>">
submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
</span>



posts/\u post\u information.html.erb

def index
  @posts = Post.all
end

def show
  @post = Post.find(params[:id])
end

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= time_ago_in_words(post.created_at) %>
  <span id="submission_details_<%= post.id %>">
  submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
  </span>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>
</div>

  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= render 'post_information', post: post %>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= render 'post_information', post: @post %>
</div>

<%= time_ago_in_words(post.created_at) %>
<span id="submission_details_<%= post.id %>">
submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
</span>


提交人
在分部上，可以定义一个局部变量，渲染分部时，正确的语法为：

render(partial: 'post_information', locals: { post: @post }

但这可以缩写为

render('post_information', post: @post)

对于show操作，在部分\u post.html.erb的情况下，您的post实例不在变量@post上，而是在局部变量post上，因此您可以执行以下操作：

render('post_information', post: post)

posts/index.html.erb

def index
  @posts = Post.all
end

def show
  @post = Post.find(params[:id])
end

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= time_ago_in_words(post.created_at) %>
  <span id="submission_details_<%= post.id %>">
  submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
  </span>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>
</div>

  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= render 'post_information', post: post %>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= render 'post_information', post: @post %>
</div>

<%= time_ago_in_words(post.created_at) %>
<span id="submission_details_<%= post.id %>">
submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
</span>



posts/\u post.html.erb

def index
  @posts = Post.all
end

def show
  @post = Post.find(params[:id])
end

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= time_ago_in_words(post.created_at) %>
  <span id="submission_details_<%= post.id %>">
  submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
  </span>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>
</div>

  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= render 'post_information', post: post %>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= render 'post_information', post: @post %>
</div>

<%= time_ago_in_words(post.created_at) %>
<span id="submission_details_<%= post.id %>">
submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
</span>



posts/show.html.erb

def index
  @posts = Post.all
end

def show
  @post = Post.find(params[:id])
end

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= time_ago_in_words(post.created_at) %>
  <span id="submission_details_<%= post.id %>">
  submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
  </span>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>
</div>

  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= render 'post_information', post: post %>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= render 'post_information', post: @post %>
</div>

<%= time_ago_in_words(post.created_at) %>
<span id="submission_details_<%= post.id %>">
submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
</span>



posts/\u post\u information.html.erb

def index
  @posts = Post.all
end

def show
  @post = Post.find(params[:id])
end

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= time_ago_in_words(post.created_at) %>
  <span id="submission_details_<%= post.id %>">
  submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
  </span>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>
</div>

  <%= time_ago_in_words(@post.created_at) %>
  <span id="submission_details_<%= @post.id %>">
  submitted by <%= link_to "#{@post.user.name} (#{@post.user.reputation_for(:points).to_i})", @post.user %>
  </span>

<%= render @posts %>

<%= post.title %>
<div class="submission_details">
  <%= render 'post_information', post: post %>
</div>

<%= @post.title %>
<%= @post.content %>
<div class="submission_details">
  <%= render 'post_information', post: @post %>
</div>

<%= time_ago_in_words(post.created_at) %>
<span id="submission_details_<%= post.id %>">
submitted by <%= link_to "#{post.user.name} (#{post.user.reputation_for(:points).to_i})", post.user %>
</span>


提交人
谢谢@rorra。一旦你得到了答案，它看起来总是那么容易！欢迎光临，这只是一个小小的练习，一定要经常回到rails指南上，关于partials的文档已经打开了。谢谢@rorra。一旦你得到了答案，它看起来总是那么容易！欢迎光临，这只是一个小小的练习，请确保不时回到rails指南中，关于partials的文档已经打开了。