Ruby on Rails:同一表单中的多个输入字段 - 更改 ID/值 [英] Ruby on Rails: Multiple Input Fields in The Same Form - Change ID/Value

问题描述

有一个页面，其中有多个相同内容的输入字段，帖子.现在，当用户输入问题时，假设有 3 个字段，唯一保存到数据库的字段是最后一个.然而，它应该保存所有三个并给他们每个人自己的 post_id.还;如果用户没有为其他字段输入任何内容，它也不应该保存在数据库中.

Have a page where there are multiple input fields of the same thing, Posts. Right now, when a user enters in a question for, let's say 3 fields, the only one that saves to the database is the last one. Whereas, it should save all three and give them each it's own post_id. Also; if the user doesn't enter anything in for the other fields, it should not save in the database either.

new_step_4_html.erb

<%= form_for(@post) do |f| %>
  <%= f.text_field :content %>
  <%= f.text_field :content %>
  <%= f.text_field :content %>
<% end %>

projects_controller.rb

def new_step_4
  @post = Post.new
end

现在，它所做的只是提交一个 :content 字段，显然是因为它们共享相同的 id/value.不幸的是，Railscasts #197 适用于嵌套表单，因此他所做的 javascript 和帮助程序都适用于嵌套.我认为这很简单.来自 IRC 的人提到我可以在视图文件中添加某种3.times"代码?

Right now, all it does is submit one :content field, obviously because they all share the same id/value. Unfortunately, the Railscasts #197 applies for nested forms, so the javascript and helper stuff he does all applies for nested. I would think this is something simple. Person from IRC mentioned I could do some sort of '3.times' code into the view file or something?

推荐答案

首先，您可能需要编辑帖子的模型.

First of all you will probably have to edit the model of you post.

post.rb

has_many :contents, :dependent => :destroy
accepts_nested_attributes_for :contents

您将需要另一个模型来存储内容字段.所以先生成一个模型

You will need another model to store the content fields. so first generate a model

rails g model content post_id:integer body:text

模型

content.rb

belongs_to  :post

现在，与其做几次 <%= f.text_field :content %> ，不如让 rails 创建它们，因为现在你基本上让它们相互覆盖了.

Now, in stead of doing <%= f.text_field :content %> a few times, let rails create them, because now you basically let them overwrite each other.

3.times do
  content = @post.content.build
end

表单视图将是这样的:

<%= form_for @post do |f| %>
  <%= f.fields_for :contents do |builder| %>
    <%= builder.label :body, "Question" %><br />
    <%= builder.text_area :body, :rows => 3 %><br /> 
  <%= end %>     
  <p><%= f.submit "Submit" %></p>
<% end %>

我没有测试这段代码，但这个想法应该是正确的.如果您需要更多信息，请告诉我.

I did not test this code, but the idea should be correct. Let me know if you need more info.

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