使用回形针的嵌套表格

问题描述:

我有一个称为posts的模型,它有很多附件。使用回形针的嵌套表格

附件模型使用回形针。

我为创建附件它工作得很好,一个独立的模型,这是因为这里指示视图(https://github.com/thoughtbot/paperclip):

<% form_for :attachment, @attachment, :url => @attachment, :html => { :multipart => true } do |form| %> 
    <%= form.file_field :pclip %> 

    <%= form.submit %> 

<% end %> 

在帖子中嵌套表格看起来像这样:

<% @attachment = @posts.attachments.build %> 
<%= form_for(@posts) do |f| %> 
    <% if @posts.errors.any? %> 
    <div id="error_explanation"> 
     <h2><%= pluralize(@posts.errors.count, "error") %> prohibited this post from being saved:</h2> 

     <ul> 
     <% @posts.errors.full_messages.each do |msg| %> 
     <li><%= msg %></li> 
     <% end %> 
     </ul> 
    </div> 
    <% end %> 

    <div class="field"> 
    <%= f.label :name %><br /> 
    <%= f.text_field :name %> 
    </div> 
    <div class="field"> 
    <%= f.label :description %><br /> 
    <%= f.text_area :description %> 
    </div> 
    <div class="field"> 
    <%= f.fields_for :attachments, @attachment, :url => @attachment, :html => { :multipart => true } do |at_form| %> 

     <%= at_form.file_field :pclip %> 

    <% end %> 
    </div> 

    <div class="actions"> 
    <%= f.submit %> 
    </div> 
<% end %> 

附件记录被创建,但它是空的。该文件未上传。与此同时,该职位已成功创建...

任何想法?

你缺少的:多选择在您的表单定义:

<% @attachment = @post.attachments.build %> 
<%= form_for @post, :html => { :multipart => true } do |f| %> 
    <% if @post.errors.any? %> 
    <div id="error_explanation"> 
     <h2><%= pluralize(@post.errors.count, "error") %> prohibited this post from being saved:</h2> 

     <ul> 
     <% @post.errors.full_messages.each do |msg| %> 
     <li><%= msg %></li> 
     <% end %> 
     </ul> 
    </div> 
    <% end %> 

    <div class="field"> 
    <%= f.label :name %><br /> 
    <%= f.text_field :name %> 
    </div> 
    <div class="field"> 
    <%= f.label :description %><br /> 
    <%= f.text_area :description %> 
    </div> 
    <div class="field"> 
    <%= f.fields_for :attachments, @attachment do |at_form| %> 

     <%= at_form.file_field :pclip %> 

    <% end %> 
    </div> 

    <div class="actions"> 
    <%= f.submit %> 
    </div> 
<% end %> 

此外,您@posts变量确实应该@Post(单实例的ActiveRecord,而不是ActiveRecord的实例的数组)。

+2

+1 此外,我不认为你需要它'fields_for'块。 – Preacher 2011-05-01 21:14:44

+0

好,我错过了那一个。我更新了代码片段。还删除了:url选项(位于fields_for级别),该选项不属于那里。 – mbreining 2011-05-01 22:01:38

+0

谢谢吨家伙! – Elliot 2011-05-02 18:08:43