Rails 3以单一形式编辑多个记录 [英] Rails 3 Edit Multiple Records in a Single Form

问题描述

我已经在Railscasts Episode＃198上取得了一些成功，但那是一个用于Rails 2.在Rails 3中有一些变化，使得它在第＃198集中提供的代码将无法工作。

问题在于edit_individual.html .erb：

原始代码（由Ryan @ Railscasts提供）：

 <％form_tag update_individual_products_path，：method => ：put do％> 
 <@products％中产品的百分比>> 
 <％fields_forproducts []，product do | f | ％GT; 
< h2><％= h product.name％>< / h2> 
 <％=呈现字段，：：f => f％> 
<％end％> 
<％end％> 
< p><％= submit_tag提交％>< / p> 
<％end％> 
  

修改后的代码（简单地将fields_for更改为form_for）：

 <％form_tag update_individual_products_path，：method => ：put do％> 
 <@products％中产品的百分比>> 
 < h2><％= h product.name％>< / h2> 
 <％=呈现字段，：：f => f％> 
<％end％> 
<％end％> 
< p><％= submit_tag提交％>< / p> 
<％end％> 
  

在新的代码中，每条记录放置在它们自己的一个表单内， （这是我唯一想要的）。

我的问题是，我怎样才能让Railscasts Episode＃198提供的代码在Rails 3中工作？

这里是我提到的Railscast的链接：
http://railscasts.com/episodes/198-edit-multiple- inddividual

谢谢你，
c。 allen.rosario

解决方案

我找到了解决方案。只需要修改Ryan @ Railscasts提供的代码中的以下行：

 <％fields_forproducts []，产品do | f | ％GT; 
  

并将其更改为：

 <％= fields_forproducts []，product do | f | ％GT; 
  

请注意，<％有已被修改为<％= 。

最终解决方案：

 <％form_tag update_individual_products_path：method => ：put do％> 
 <@products％中产品的百分比>> 
 <％= fields_forproducts []，product do | f | ％GT; 
< h2><％= h product.name％>< / h2> 
<％end％> 
<％end％> 
< p><％= submit_tag提交％>< / p> 
<％end％> 
  

我想知道是否有人可以向我解释这个解决方案。据我所知，你应该只需要在 fields_for 前加上一个<％。

c.allen.rosario

I've been stuck on this problem for a couple of days now.

I've have some success with Railscasts Episode #198, but that one is for Rails 2. There have been some changes in Rails 3 that make it so the code provided in Episode #198 won't work.

The problem lies within the edit_individual.html.erb:

Original Code (provided by Ryan @ Railscasts):

<% form_tag update_individual_products_path, :method => :put do %>
  <% for product in @products %>
    <% fields_for "products[]", product do |f| %>
      <h2><%=h product.name %></h2>
      <%= render "fields", :f => f %>
    <% end %>
  <% end %>
  <p><%= submit_tag "Submit" %></p>
<% end %>

Modified Code (simply changed fields_for to form_for):

<% form_tag update_individual_products_path, :method => :put do %>
  <% for product in @products %>
    <% form_for "products[]", product do |f| %>
      <h2><%=h product.name %></h2>
      <%= render "fields", :f => f %>
    <% end %>
  <% end %>
  <p><%= submit_tag "Submit" %></p>
<% end %>

In the new code, each record is placed within a form of their own, all inside one single form (which is the one I only want).

My question is, how can I get the code provided by Railscasts Episode #198 to work in Rails 3?

Here is a link to the Railscast I mentioned: http://railscasts.com/episodes/198-edit-multiple-individually

Thank You, c.allen.rosario

解决方案

I found the solution. Just need to modify the following line in the code provided by Ryan @ Railscasts:

<% fields_for "products[]", product do |f| %>

and change it to:

<%= fields_for "products[]", product do |f| %>

Notice, that the <% has been modified to <%=.

final solution:

<% form_tag update_individual_products_path :method => :put do %>  
  <% for product in @products %>  
    <%= fields_for "products[]", product do |f| %>  
      <h2><%= h product.name %></h2>  
    <% end %>  
  <% end %>  
  <p><%= submit_tag "Submit" %></p>  
<% end %>  

I was wondering if anyone could explain this solution to me. From what I understand you should only need a <% in front of the fields_for.

c.allen.rosario

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