有三种型号:
class Offer < ActiveRecord::Base
has_many :offer_items
end
class OfferItem < ActiveRecord::Base
belongs_to :offer
belongs_to :partner_product
accepts_nested_attributes_for :partner_product
end
class PartnerProduct < ActiveRecord::Base
has_many :offer_items
accepts_nested_attributes_for :offer_items
end
在编辑商品的表单中,有要编辑offer_item的fields_for
<% f.fields_for :offer_items do |offer_item_form| -%>
<div class='offer_item'>
<%= render :partial => 'offer_item_fields', :locals => {:offer_item_form => offer_item_form}%>
</div>
<% end -%>
部分中的代码块:
<%= offer_item_form.object.partner_product.name%>
抛出错误
nil的未定义方法`name':NilClass
提取的来源(第29行):
<%= offer_item_form.object.partner_product.name%>
但是当我不问这个名字时,就像这个
<%= offer_item_form.object.partner_product%>
<%= debug( offer_item_form.object.partner_product)%>
进入浏览器:
#<PartnerProduct:0x007fa8785ff938>
--- !ruby/ActiveRecord:PartnerProduct
attributes:
id: 1
partner_id: 586
name: a
stock_volume: 0
source_price: 0
created_at: 2012-05-31 14:05:47 Z
updated_at: 2012-05-31 14:05:47 Z
我不只是想知道,为什么我无法访问'name'属性并将partner_product更改为nil,但我真的应该展示它。欢迎任何帮助! 感谢