xml dataweave 中的输入映射

Question

输入文件是-

<A>
  <B>
    <merchant_ref>icici</merchant_ref>
    <transaction_tag>sdfhisdb</transaction_tag>
    <transaction_type>inquiry</transaction_type>
    <method>valuelink</method>
    <order_number>123</order_number>
    <amount>1000</amount>
    <currency_code>CAD</currency_code>
  </B>
  <B>
    <merchant_ref>icici</merchant_ref>
    <transaction_tag>sdfhisdb</transaction_tag>
    <transaction_type>inquiry</transaction_type>
    <method>valuelink</method>
    <order_number>123</order_number>
    <amount>2000</amount>
    <currency_code></currency_code>
  </B>
  <B/>
  <B>
    <merchant_ref>icici</merchant_ref>
    <transaction_tag>sdfhisdb</transaction_tag>
    <transaction_type>inquiry</transaction_type>
    <method>valuelink</method>
    <order_number>123</order_number>
    <amount>4000</amount>
    <currency_code></currency_code>
  </B>
  <B>
    <merchant_ref>icici</merchant_ref>
    <transaction_tag>sdfhisdb</transaction_tag>
    <transaction_type>inquiry</transaction_type>
    <method>valuelink</method>
    <order_number>123</order_number>
    <amount>5000</amount>
    <currency_code></currency_code>
  </B>
</A>

尝试在 dataweave 中使用以下代码进行映射

 %output application/xml
    ---
    Inquiry: payload.A.*B mapObject
        {
         balanceInquiry:
               { 
                request: {
                    amount:{
                    amount: payload.A.B.amount/1000 as :number,            
                    currency: payload.A.B.currency_code
                           }
                         }
               }
         }

我正在尝试映射 A 下的每个 B 值，但每次我得到相同的第一件事 5 次作为数量 1.0 是否应该更改为 2.0 4.0 和 5.0

如果我在实现 B 的所有值时做错了什么，请纠正我

Answer 1

如果使用 mapObject 且未定义参数（键和值），则应使用其默认值。键默认定义为 $$，值默认定义为 $.

因此，（部分）DataWeave 代码应该是：

amount: $.amount / 1000 as :number when $.amount != null otherwise 0,
currency: $.currency_code default ""

Answer 2

我没有仔细研究为什么 $.amount 不可访问，但对您的代码进行一些更改可以使其正常工作。检查下面 -

%dw 1.0
%output application/xml
---
{
 Inquiry: payload.A.*B mapObject
    {
        balanceInquiry:
           { 
            request: {
                amount:{
                amount: ($[5]/1000 when $[5] != null otherwise 0) as :number,            
                currency: payload.A.B.currency_code
                       }
                     }
           }
     }
}

输出看起来像 -

<?xml version='1.0' encoding='windows-1252'?>
<Inquiry>
  <balanceInquiry>
    <request>
      <amount>
        <amount>1.0</amount>
        <currency>CAD</currency>
      </amount>
    </request>
  </balanceInquiry>
  <balanceInquiry>
    <request>
      <amount>
        <amount>2.0</amount>
        <currency>CAD</currency>
      </amount>
    </request>
  </balanceInquiry>
  <balanceInquiry>
    <request>
      <amount>
        <amount>0</amount>
        <currency>CAD</currency>
      </amount>
    </request>
  </balanceInquiry>
  <balanceInquiry>
    <request>
      <amount>
        <amount>4.0</amount>
        <currency>CAD</currency>
      </amount>
    </request>
  </balanceInquiry>
  <balanceInquiry>
    <request>
      <amount>
        <amount>5.0</amount>
        <currency>CAD</currency>
      </amount>
    </request>
  </balanceInquiry>
</Inquiry>

xml dataweave 中的输入映射

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