小编Rys*_*aum的帖子

我正在尝试使用RoR中的form_for帮助器生成表单,但我遇到的似乎是路由错误.以下是相关文件:

车型/ equipment.rb

class Equipment < ActiveRecord::Base
  attr_accessible :name, :tracking_number
  validates :tracking_number, :presence => true,
                              :uniqueness => { :case_sensitive => true }
end

控制器/ equipments_controllers.rb

class EquipmentsController < ApplicationController
  def index
    @equipments = Equipment.paginate(:page => params[:page])
  end

  def new
    @equipment  = Equipment.new
  end

end

视图/设备/ new.html.rb

<h1>Add an equipment</h1>
<%= form_for (@equipment) do |f| %>
  <%= render 'shared/error_messages', :object => f.object %>
  <div class="field">
    <%= f.label :name %> <br />
    <%= f.text_field :name %>
  </div>
  <div class="field">
    <%= f.label :tracking_number …

我有两个型号,项目和产品如下:

irb(main):007:0> Item
=> Item(id: integer, identification_number: string, production_date: date, 
        created_at: datetime, updated_at: datetime, going_in: boolean)
irb(main):008:0> Product
=> Product(id: integer, sku: string, barcode_identification: string, 
           created_at: datetime, updated_at: datetime)

您可以将其视为特定产品.

我已经设法通过引用特定产品(Product.find(1).items)的所有项目

class Product < ActiveRecord::Base
  has_many :items, :foreign_key => "identification_number", 
                   :primary_key => "barcode_identification"
end

但我似乎无法推荐特定产品的产品.这就是我现在所拥有的:

class Item < ActiveRecord::Base
  set_primary_key :identification_number
  belongs_to :product, :foreign_key => "barcode_identification"
end

就我的理解而言:数据库,这应该工作.除了它没有.也许我错过了这里的一些东西？我对rails很新(大约一个月或更短的时间.)