Rails单表继承与单元测试中的HABTM Fixture返回NoMethodError:undefined方法`singularize'

时间:2010-03-03 09:08:22

标签: ruby-on-rails unit-testing fixtures has-and-belongs-to-many single-table-inheritance

想象一下模型结构如下:

模型/ cross_sell_promotion.rb

     class CrossSellPromotion < Promotion
       has_and_belongs_to_many :afflicted_products, :join_table => :promotion_afflicted_products, :foreign_key => 'promotion_id', :association_foreign_key => 'product_id', :class_name => 'Product'
       has_and_belongs_to_many :afflicted_categories, :join_table => :promotion_afflicted_categories, :foreign_key => 'promotion_id', :association_foreign_key => 'category_id', :class_name => 'Category'
       . . .
     end

模型/ promotion.rb

class Promotion < ActiveRecord::Base
  has_and_belongs_to_many :products, :join_table => :promotions_products
  has_and_belongs_to_many :categories, :join_table => :promotions_categories
  - - -
end

和表格如下:

table promotions
type :string
...some other fields unrelated to this problem

table promotions_products
promotion_id :integer
product_id :integer

table promotion_afflicted_products
promotion_id :integer
product_id :integer

table promotion_afflicted_categories
promotion_id :integer
category_id :integer

然后我有一个固定装置如下:

#promotions.yml
cross_sell_1:
products: plumeboom_1, plumeboom_2
  value: 100
  value_type: percentage
  type: CrossSellPromotion

#products.yml
plumeboom_1:
  model: plumeboom1
  url: plumeboom-1

plumeboom_2:
  model: plumeboom2
  url: plumeboom-2

plumeboom_3:
  model: plumeboom3
  url: plumeboom-3

当我运行单元测试时,它会返回以下错误消息:

1) Error:
test_the_truth(CartTest):
NoMethodError: undefined method `singularize' for :promotions_products:Symbol

请让我知道,如果您碰巧有类似的经历或知道如何解决这个问题,或者至少只是您认为可能出错的事情,我准备尝试任何事情了!

非常感谢,请不要犹豫回复......真的很绝望!

1 个答案:

答案 0 :(得分:3)

答案是......你不能!

可悲的是,有时候Rails不会削减它。在这些情况下,只需为关联表创建另一个Fixture。

E.g。在这种情况下,promotion_products.yml并在其中输入:

pp1:
    promotion_id: <%= Fixtures.identify(:cross_sell_1) %>
    product_id: <%= Fixtures.identify(:plumeboom_1) %>

我设法在灯具中使用HABTM连接但是当它们也有STI(单表继承)时,它似乎有问题。