在 ruby​​ on rails 中为哈希添加值

Question

我在向 ruby​​ on rails 中的哈希添加新键和值时遇到问题。该方法看起来像这样，带有两个调试打印，并且应该简单地添加索引 + 1 作为值的提供程序键，以便稍后访问具有正确 ID 的提供程序。

search_result.each_with_index do |articles, index|
  puts "merge-articles: #{articles}"
  articles.each{ |article| article[:provider] = index + 1;}
  puts "merge-articles(later): #{articles}"
end                                        

我从 puts 中得到了那些输出，在我看来这看起来相当不错：

merge-articles: [{:ean=>"9780234474278", :author=>"Dan Brown", :name=>"The Da Vinci Code", :price=>19.65, :image=>"www.google.de/image.png"}]
merge-articles(later): [{:ean=>"9780234474278", :author=>"Dan Brown", :name=>"The Da Vinci Code", :price=>19.65, :image=>"www.google.de/image.png", :provider=>2}]

仅测试密钥是否存在的规范会出现此错误：

 Failure/Error: HomeController.merge(@no_same_items_merge).each do |item|
 TypeError:
   can't convert Symbol into Integer
 # ./app/controllers/home_controller.rb:41:in `[]='
 # ./app/controllers/home_controller.rb:41:in `block (2 levels) in merge'
 # ./app/controllers/home_controller.rb:41:in `each'
 # ./app/controllers/home_controller.rb:41:in `block in merge'
 # ./app/controllers/home_controller.rb:39:in `each'
 # ./app/controllers/home_controller.rb:39:in `each_with_index'
 # ./app/controllers/home_controller.rb:39:in `merge'
 # ./spec/controllers/home_controller_spec.rb:104:in `block (5 levels) in <top (required)>'

编辑：RSpec 测试如下所示：

    it "should return an array of right formatted hashes" do
      HomeController.merge(@no_same_items_merge).each do |item|
        item.should have_key(:name)
        item.should have_key(:ean)
        item.should have_key(:author)
        item.should have_key(:description)
        item.should have_key(:url)
        item.should have_key(:prices)
        item.should have_key(:images)
      end
    end   

感谢您的帮助！

Answer 1

在规范中，将article 设置为Array，而不是Hash。