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

问题描述

我正在尝试优雅地处理以下错误的 JSON，其中 Hash#fetch 似乎不是一个选项(使用 Hash#fetch 优雅地处理错误的 JSON):

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):

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

显然最好的方法是在每个参数的末尾添加 { 'not found' } :

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

但是有没有办法把它弄干?

已根据与@dax 的讨论进行更新

Edited: Updated as per discussion with @dax

推荐答案

我不确定 product.price = product.deep_fetch(attribute, { 'not found' }) 中的正确语法:

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

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