用Ruby中的分层JSON生成扁平JSON（非规范化）的最佳方法

我正在努力实现以下目标。我的输入JSON如下所示

{
   "data":{
      "shipping_address":[
         {
            "cust_id":"CUST-123",
            "street":"123 Main St",
            "city":"Atlanta",
            "state":"GA",
            "zip":"12345"
         },
         {
            "cust_id":"CUST-456",
            "street":"456 Front St",
            "city":"Philadelphia",
            "state":"PA",
            "zip":"23456"
         }
      ],
      "orders":[
         {
            "cust_id":"CUST-456",
            "items":[
               {
                  "quantity":"2",
                  "item_code":"ABC-111-222",
                  "cust_id":"CUST-456"
               },
               {
                  "quantity":"1",
                  "item_code":"DEF-999-01-001",
                  "cust_id":"CUST-456"
               }
            ]
         },
         {
            "cust_id":"CUST-123",
            "items":[
               {
                  "quantity":"10",
                  "item_code":"998-111-222",
                  "cust_id":"CUST-123"
               }
            ]
         }
      ],
      "payment":[
         {
            "cust_id":"CUST-123",
            "type":"VISA",
            "card_no":"1234-1111-2222-3333",
            "expiry":"06/2016",
            "billing_add_same_as_shipping":"Y",
            "first_name":"John",
            "last_name":"Smith"
         },
         {
            "cust_id":"CUST-456",
            "type":"VISA",
            "card_no":"5678-4444-8877-5544",
            "expiry":"08/2016",
            "billing_add_same_as_shipping":"N",
            "first_name":"Steve",
            "last_name":"Jones"
         }
      ],
      "billing_address":[
         {
            "cust_id":"CUST-456",
            "street":"7788 Back St",
            "city":"Gainesville",
            "state":"FL",
            "zip":"33444"
         }
      ]
   }
}

我想把这个json分解成两个独立的json

{
   "data":{
      "shipping_address":{
         "cust_id":"CUST-456",
         "street":"456 Front St",
         "city":"Philadelphia",
         "state":"PA",
         "zip":"23456"
      },
      "orders":{
         "cust_id":"CUST-456",
         "items":[
            {
               "quantity":"2",
               "item_code":"ABC-111-222",
               "cust_id":"CUST-456"
            },
            {
               "quantity":"1",
               "item_code":"DEF-999-01-001",
               "cust_id":"CUST-456"
            }
         ]
      },
      "payment":{
         "cust_id":"CUST-456",
         "type":"VISA",
         "card_no":"5678-4444-8877-5544",
         "expiry":"08/2016",
         "billing_add_same_as_shipping":"N",
         "first_name":"Steve",
         "last_name":"Jones"
      },
      "billing_address":{
         "cust_id":"CUST-456",
         "street":"7788 Back St",
         "city":"Gainesville",
         "state":"FL",
         "zip":"33444"
      }
   }
}

及

---

在Ruby中有没有一种简单的方法可以在不循环/解析输入json的每个片段的情况下执行此操作（即，通过进行任何json映射）？

这是我当前的解决方案

注意：我的输入是来自Java的POJO，其中evaluationTarget包含输入JSON

def json_flattening(input)
    customer_order_hash = Hash.new
    orders_data = input.evaluationTarget
    orders_data.keys.each do |orders_keys|
        orders_data[orders_keys].each do |orders_keys_data|
            if !customer_order_hash.has_key?(orders_keys_data['cust_id']) then
                each_order_hash = Hash.new
                customer_order_hash[orders_keys_data['cust_id']] = each_order_hash
            end

            customer_order_hash[orders_keys_data['cust_id']][orders_keys] = orders_keys_data            
        end
    end
    customer_order_hash.keys.each do |cust_id|
        puts customer_order_hash[cust_id]
    end
end

{"shipping_address"=>{"cust_id"=>"CUST-123", "street"=>"123 Main St", "city"=>"Atlanta", "state"=>"GA", "zip"=>"12345"}, "orders"=>{"cust_id"=>"CUST-123", "items"=>#<Java::NetSfJson::JSONArray:0x69522a14>}, "payment"=>{"cust_id"=>"CUST-123", "type"=>"VISA", "card_no"=>"1234-1111-2222-3333", "expiry"=>"06/2016", "billing_add_same_as_shipping"=>"Y", "first_name"=>"John", "last_name"=>"Smith"}}
{"shipping_address"=>{"cust_id"=>"CUST-456", "street"=>"456 Front St", "city"=>"Philadelphia", "state"=>"PA", "zip"=>"23456"}, "orders"=>{"cust_id"=>"CUST-456", "items"=>#<Java::NetSfJson::JSONArray:0x40030597>}, "payment"=>{"cust_id"=>"CUST-456", "type"=>"VISA", "card_no"=>"5678-4444-8877-5544", "expiry"=>"08/2016", "billing_add_same_as_shipping"=>"N", "first_name"=>"Steve", "last_name"=>"Jones"}, "billing_address"=>{"cust_id"=>"CUST-456", "street"=>"7788 Back St", "city"=>"Gainesville", "state"=>"FL", "zip"=>"33444"}}

def json_展平（输入）
客户\u订单\u哈希=hash.new
订单\u数据=input.evaluationTarget
orders_data.keys.每个do| orders_key|
订单_数据[订单_键]。每个do |订单_键_数据|
如果客户订单散列。是否有密钥？（订单密钥数据['cust\u id']）然后
每个\u顺序\u哈希=hash.new
客户订单散列[订单密钥数据['cust\u id']]=每个订单散列
终止
客户订单散列[订单密钥数据['cust\u id']][订单密钥]=订单密钥数据
终止
终止
客户订单散列密钥每个do客户id|
将客户\u订单\u散列[cust\u id]
终止
终止
{“发货地址”=>{“客户id”=>“客户123”，“街道”=>“123大街”，“城市”=>“亚特兰大”，“州”=>“乔治亚州”=>“邮编”=>“12345”}，“订单”=>{“客户id”=>“客户123”，“项目”=>，“付款”=>“客户id”=>“客户123”，“类型”=>“签证”，“卡号”=>“1234-1111-2222-3333”，“有效期”=>“2016年6月”；“账单”=>“添加与您的姓氏相同”、“约翰”=>“史密斯”}
{“发货地址”=>{“客户id”=>“客户-456”，“街道”=>“456前街”，“城市”=>“费城”，“州”=>“PA”，“邮编”=>“23456”}，“订单”=>{“客户id”=>“客户-456”，“项目”=>，“付款”=>{“客户id”=>“客户-456”，“类型”=>“签证”，“卡号”=>“5678-4444-8877-5544”，“到期”=>“08”=>“添加账单”=>“与第一次发货相同”=>姓氏“=>”琼斯“，”账单地址“=>”{“客户id”=>“客户-456”，“街道”=>“后大街7788号”，“城市”=>“盖恩斯维尔”，“州”=>“佛罗里达州”，“邮编”=>“33444”}

@DavidGrayson我是ruby开发新手。在我的ruby脚本中，我使用JSON模块执行各种JSON操作。JSON.parse（input_JSON_string）正在返回一个散列对象。我最初想循环遍历json中的每个段，并为每个cust_id找到匹配的相应json片段并创建一个新的json。我不确定这样做是否最佳，我想知道是否有任何ruby库/gem可用于实现这一点。

def json_flattening(input)
    customer_order_hash = Hash.new
    orders_data = input.evaluationTarget
    orders_data.keys.each do |orders_keys|
        orders_data[orders_keys].each do |orders_keys_data|
            if !customer_order_hash.has_key?(orders_keys_data['cust_id']) then
                each_order_hash = Hash.new
                customer_order_hash[orders_keys_data['cust_id']] = each_order_hash
            end

            customer_order_hash[orders_keys_data['cust_id']][orders_keys] = orders_keys_data            
        end
    end
    customer_order_hash.keys.each do |cust_id|
        puts customer_order_hash[cust_id]
    end
end

{"shipping_address"=>{"cust_id"=>"CUST-123", "street"=>"123 Main St", "city"=>"Atlanta", "state"=>"GA", "zip"=>"12345"}, "orders"=>{"cust_id"=>"CUST-123", "items"=>#<Java::NetSfJson::JSONArray:0x69522a14>}, "payment"=>{"cust_id"=>"CUST-123", "type"=>"VISA", "card_no"=>"1234-1111-2222-3333", "expiry"=>"06/2016", "billing_add_same_as_shipping"=>"Y", "first_name"=>"John", "last_name"=>"Smith"}}
{"shipping_address"=>{"cust_id"=>"CUST-456", "street"=>"456 Front St", "city"=>"Philadelphia", "state"=>"PA", "zip"=>"23456"}, "orders"=>{"cust_id"=>"CUST-456", "items"=>#<Java::NetSfJson::JSONArray:0x40030597>}, "payment"=>{"cust_id"=>"CUST-456", "type"=>"VISA", "card_no"=>"5678-4444-8877-5544", "expiry"=>"08/2016", "billing_add_same_as_shipping"=>"N", "first_name"=>"Steve", "last_name"=>"Jones"}, "billing_address"=>{"cust_id"=>"CUST-456", "street"=>"7788 Back St", "city"=>"Gainesville", "state"=>"FL", "zip"=>"33444"}}