accep_nested_attributes_for保持表单域不显示 [英] accepts_nested_attributes_for keeps form fields from showing

问题描述

当我使用 accepts_nested_attributes_for 时，相应的字段不再显示在我的视图中。

  class Survey< ActiveRecord :: Base 
 has_many：questions 
 accept_nested_attributes_for：questions 
 end 
 
 class问题< ActiveRecord :: Base 
 belongs_to：survey 
 end 
  

然后在我看来：

 <％= form_for @survey do | f | ％GT; 
 <％= f.fields_for：questions do | question_fields | ％GT; 
<％= question_fields.text_area：text％> 
<％end％> 
<％end％> 
  

如果我删除 accepts_nested_attributes_for ，那么 text_area 显示，但如果我保留它...没有任何呈现。

我正在运行Rails 3.0.3

解决方案

您是否在控制器中构建问题？

类似于

@ survey.questions.build

这会建立一个相关的问题，因此只会显示一个文本区域。像循环一样运行它。

2.times {@ survey.questions.build}

它会出现2次。

When I use accepts_nested_attributes_for the corresponding fields no longer show in my view.

class Survey < ActiveRecord::Base
  has_many :questions   
  accepts_nested_attributes_for :questions
end

class Question < ActiveRecord::Base
  belongs_to :survey
end

Then in my view:

<%= form_for @survey do |f| %>
  <%= f.fields_for :questions do |question_fields| %>
    <%= question_fields.text_area :text %> 
  <% end %>
<% end %>

If I remove accepts_nested_attributes_for then the text_area shows, but if I keep it...nothing gets renders.

I'm running Rails 3.0.3

解决方案

Did you build the questions , in the controller ?

Something like

@survey.questions.build

This builds one related question, so only one text area will show up. run it in a loop like

2.times { @survey.questions.build }

It will appear 2 times.

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