如何使用多个{'not found'}干掉方法？ [英] How to DRY up method with multiple { 'not found' }?

问题描述

我正在尝试为下面的内容正常处理坏的JSON，其中 Hash＃fetch 似乎不是一个选项（用Hash＃fetch 优雅地处理坏的JSON）：

直播应用： http://runnable.com/U-QJCIFvY2RGWL9B/pretty- json-keys （ main_controller.rb ）

所以显然最好的方法是添加 {'not found'} 到每个参数的结尾：

  mashie。 products.each do | product | 
 product.extend Hashie :: Extensions :: DeepFetch 
 
 product.name = product.deep_fetch：name {'not found'} 
 product.brand = product.deep_fetch：brand ，：name {'not found'} 
 product.price = product.deep_fetch：sale_price {'not found'} 
 product.currency = product.deep_fetch：currency {'not found'} 
 
 @products<<产品
结束
  

但是有没有办法干这个呢？

已编辑：根据与@dax的讨论进行更新

解决方案

我对 product.price = product.deep_fetch（属性，{'not found'}）：

  mashie.products.each do | product | 
 product.extend Hashie :: Extensions :: DeepFetch 
 
 i％[name sale_price currency] .each do | attribute | 
 product.price = product.deep_fetch属性{'未找到'} 
结束
 
 @products<<产品
结束
  

I'm trying to gracefully handle bad JSON for the following, where Hash#fetch doesn't seem to be an option (Handle bad JSON gracefully with Hash#fetch):

Live app: http://runnable.com/U-QJCIFvY2RGWL9B/pretty-json-keys (main_controller.rb)

So apparently the best way is to add { 'not found' } to the end of each argument:

mashie.products.each do |product|
  product.extend Hashie::Extensions::DeepFetch

  product.name = product.deep_fetch :name { 'not found' }
  product.brand = product.deep_fetch :brand, :name { 'not found' }
  product.price = product.deep_fetch :sale_price { 'not found' }
  product.currency = product.deep_fetch :currency { 'not found' }

  @products << product
end

But is there a way to DRY this up?

Edited: Updated as per discussion with @dax

解决方案

I not sure about right syntax in product.price = product.deep_fetch(attribute, { 'not found' }):

mashie.products.each do |product|
  product.extend Hashie::Extensions::DeepFetch

  i%[name sale_price currency].each do |attribute|
    product.price = product.deep_fetch attribute { 'not found' }
  end

  @products << product
end

这篇关于如何使用多个{'not found'}干掉方法？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！