小编Acu*_*uña的帖子

我在Rails 3.2.5中做了一个嵌套的表单,但是当我添加accepts_nested_attributes_for我的fields_for消失时(他们只是停止在我的表单中显示).
这是我的模特:

class Product < ActiveRecord::Base
    attr_accessible :title, :description, :variants_attributes

    has_many :variants
    accepts_nested_attributes_for :variants

    validates :title, presence: true
end  

我的第二个模特是

class Variant < ActiveRecord::Base
    belongs_to :product
    attr_accessible :price, :sku, :weight, :inventory_quantity, :product_id
end

在我看来,我有

<%= form_for [:admin, @product], :html => {:multipart => true} do |f| %>

 <%= render 'admin/shared/error_messages', object: f.object %>

 <fieldset>
  <legend>Producto Nuevo</legend>  
    <div class="control-group">
      <%= f.label :title, 'Título', class: 'control-label' %>
      <div class="controls">
        <%= f.text_field :title %>
      </div>
   </div>

    **<%= f.fields_for :variants …