mule - 如何在 Mule DataWeave 中过滤 JSON 数组

Question

我有一个这样的 JSON:

{
  "dcsId": "1184001100000000517",
  "marketCode": "US",
  "languageCode": "en-US",
  "profile": {
  "base": {
     "username": "arunima27",
     "activeInd": "R",
     "phone": [
       {
          "activeInd": "Y",
          "type": "mobile",
          "primaryInd": "Y",
          "number": "2234566788"
       },
       {
         "activeInd": "N",
         "type": "mobile",
         "primaryInd": "N",
         "number": ""
       }
      ]
    }
  }
 }

从这个输入 JSON 中，我们需要提取 payload.profile.base.phone.number，其中 payload.profile.base.phone.type == "mobile"和 payload.profile.base.phone.activeInd == "Y"。实际上，我们需要遍历 JSON 数组 (payload.profile.base.*phone) 并仅获取处于事件状态且类别/类型为移动设备的电话号码。

我们需要如下输出:

{
  "dcsId": "1184001100000000517",
  "marketCode": "US",
  "languageCode": "en-US",
  "username" :  "arunima27", 
  "phoneNumber" : "2234566788"
}  

我们在对“phoneNumber”输出变量进行这种转换时遇到了问题。

Answer 1

从您的预期结果来看，您似乎只想要第一个匹配的数字。这是 dataweave 正是这样做的:

%dw 1.0
%output application/json
---
{
    dcsid: payload.dcsId,
    markCode: payload.marketCode,
    languageCode: payload.languageCode,
    username: payload.profile.base.username,
    phoneNumber: (payload.profile.base.phone filter ($.activeInd == 'Y' and $.type == 'mobile'))[0].number
}

如果您想要所有匹配的电话号码，只需将 [0] 留在外面，结果中 phoneNumber 的值将是一个数组(不仅仅是第一个匹配的电话号码)。