在Rails中迭代这个结构的最好方法是什么？

Question

我对rails很陌生，很难弄清楚如何迭代这些数据。这是集成etsy的gem的输出。看上去像是一组哈希，也许？

output=[#<Etsy::Listing:0x5551ba8 @result={"listing_id"=>182661496, "title"=>"Edible Butterflies in Coral", "quantity"=>1, "price"=>"12.50", "ending_tsz"=>1405362199, "shipping_template_id"=>nil, "MainImage"=>{"url_75x75"=>"https://img1.etsystatic.com/036/0/8545731/il_75x75.576542775_ibud.jpg"}}, @token="token", @secret="secret">, 
#<Etsy::Listing:0x5551bc0 @result={"listing_id"=>182671909, "title"=>"Marshmallow Sampler Pack", "quantity"=>3, "price"=>"9.50", "ending_tsz"=>1405362468, "shipping_template_id"=>1680751676, "MainImage"=>{"url_75x75"=>"https://img1.etsystatic.com/021/0/8545731/il_75x75.576544537_n2zo.jpg"}}, @token="token", @secret="secret">, 
#<Etsy::Listing:0x5551bf0 @result={"listing_id"=>182663346, "title"=>"Gourmet popcorn and seasoning kit", "quantity"=>15, "price"=>"26.95", "ending_tsz"=>1405363087, "shipping_template_id"=>nil, "MainImage"=>{"url_75x75"=>"https://img0.etsystatic.com/026/0/8545731/il_75x75.576428850_r1mv.jpg"}}, @token="token", @secret">, 
#<Etsy::Listing:0x5551c08 @result={"listing_id"=>189414412, "title"=>"Sailor Tote Bag", "quantity"=>45, "price"=>"50.00", "ending_tsz"=>1410586221, "shipping_template_id"=>1024284528, "MainImage"=>{"url_75x75"=>"https://img0.etsystatic.com/039/0/8545731/il_75x75.576443100_slse.jpg"}}, @token="token", @secret="secret">]

我试过的东西似乎都不起作用。将其作为数组处理对于某些事情是有效的，比如: output.length正确地返回4，但是输出返回没有任何其他数据的。我真正需要的是包含在@result={}中的内容。想法？谢谢!

Answer 1

看来你错过了这个在医生里的阅读

listings = output.map do |listing| 
  { 
    "title"    => listing.title, 
    "quantity" => listing.quantity, 
    "price"    => listing.price
  }
end

Answer 2

你写道：

看上去像是一组哈希，也许？

是一个对象数组，每个对象都是一个Etsy::Listing实例。您应该能够在Rails控制台上这样做：

> listing = output.first
#=> <Etsy::Listing:0x5483418>
> listing.result
#=> {"listing_id"=>182661496, …}

如果您想对每个清单执行一些操作，可以这样做：

> output.each {|listing| puts listing.result.title }
Edible Butterflies in Coral
Marshmallow Sampler Pack
Gourmet popcorn and seasoning kit
Sailor Tote Bag
>