Rails:动态更改表单内容 [英] Rails: dynamically changing form content

问题描述

我正在Rails中构建消息应用程序，用户可以在其中从模板发送消息.我有一个模板数据库，用户可以根据类别选择模板.

I am building message app in rails where user can send message from templates. I have a database of templates, and the user can select templates as per category.

在我的消息模型中，我想根据所选类别动态呈现模板.我在Google上查找了示例，但找不到相关的解决方案.

In my message model, I want to render the template dynamically based on category selected. I looked for examples on google, but was not able to find a relevant solution.

这是我的留言表格:

<%= form_for @message, :html => {:multipart => true} do |m| %>
  <%= m.select :biz_case, options_for_select(Message::Bcase), :prompt => "Select business case" %>
  <%= m.text_field :subject, :class => "message-text", :placeholder => "Subject" %>
  <div class="message-body">
    <%= m.text_area :message, :class => "message-body", :class => "redactor", :placeholder => "Your content" %>
  </div>
  <%= m.select :user_type, options_for_select(Customer::CType), :prompt => "Customer segment" %>
  <%= m.submit %>
<% end %>

在上面的表格中，我希望根据所选的业务案例显示主题和正文.像这样:

In the above form, I am looking to display the subject and body based on the selected business case. Something like:

if biz_case == "promote"
  subject = @template.subject where ("biz_case = ?", "promote")
  message = @template.content where ("biz_case = ?", "promote")
end

主题和消息将显示在输入文本字段中.

The subject and message would be displayed in input text fields.

谁能告诉我该怎么做?

推荐答案

在您的方法中:

@subject = @template.subject where ("biz_case = ?", "promote")

视图中:

<%= m.text_field :subject, :value => @subject, :class => "message-text", :placeholder => "Subject" %>

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