如何在 Mule4 中使用 groupBy 和 Array to XMl 上的 orderBy

Question

我将输入作为数组 (json) 需要 groupBy 和 orderBy 与 clientId 以便其内部 Lines 被分组和排序进入 xml 中的一个根（clientId 的重复行）。我不知道如何使用 dataweave 进行 XMl 响应。请找到请求和预期响应。

要求：

 [
    {
     "ClientId": 2,
     "Code": "string",
     "ReceivedDate": "2018-10-23",
     "ReceivedTime": "2217",
     "Warehouse": "30",
     "Quantity": "20"
   },
   {
     "ClientId": 1,
     "Code": "string",
     "ReceivedDate": "2018-10-23",
     "ReceivedTime": "2217",
     "Warehouse": "56",
     "Quantity": "20"
  },
  {
     "ClientId": 1,
     "Code": "string",
     "ReceivedDate": "2018-10-23",
     "ReceivedTime": "2217",
     "Warehouse": "70",
     "Quantity": "20"
  }
  
]

回应

<?xml version='1.0' encoding='UTF-8'?>
 <Receipt>
   <client clientId="1">
     <code>string</code>
     <Lines>
       <Warehouse>56</Warehouse>
       <Quantity>20</Quantity>
     </Lines>
     <Lines>
       <Warehouse>70</Warehouse>
       <Quantity>20</Quantity>
     </Lines>
   </client>
   <client  clientId="2">
     <code>string</code>
     <Lines>
       <Warehouse>30</Warehouse>
       <Quantity>20</Quantity>
     </Lines>
   </client>
 </Receipt>

如果问题不清楚，请告诉我。提前致谢。

Answer 1

试试这个，注释嵌入代码中：

%dw 2.0
output application/xml

var data =  [
    {
     "ClientId": 2,
     "Code": "string",
     "ReceivedDate": "2018-10-23",
     "ReceivedTime": "2217",
     "Warehouse": "30",
     "Quantity": "20"
   },
   {
     "ClientId": 1,
     "Code": "string",
     "ReceivedDate": "2018-10-23",
     "ReceivedTime": "2217",
     "Warehouse": "56",
     "Quantity": "20"
  },
  {
     "ClientId": 1,
     "Code": "string",
     "ReceivedDate": "2018-10-23",
     "ReceivedTime": "2217",
     "Warehouse": "70",
     "Quantity": "20"
  }
]

---
Receipt: do {
    // Group by the data
    var groupedData = data groupBy $.ClientId
    // Order the client Ids
    var orderedClientIds = groupedData pluck $$ orderBy $ as Number
    ---
    // Iterate over the ordered clientIds and create an object, hence the use of reduce
    orderedClientIds reduce (cId, cIds={}) -> cIds ++ {
        // Add the clientId attribute to the client tag
        client @(clientId: cId ): {
            // Get the code from the first element in the array
            code: groupedData[cId][0].Code,
            // Create the Lines, should you avoid repeating tags at the
            // same level with other tags?  i.e. code and Lines
            // IMHO a best practice XML should have code, a single Lines
            // and nested in Lines, one or more Line tags organizing the
            // data
            Lines: groupedData[cId]  reduce (
                (l,ls={}) -> ls ++ Lines :{
                    Warehouse: l.Warehouse,
                    Quantity: l.Quantity
                }   
            )
        }
    }
}

我还不清楚您是否要订购 Warehouse and/or Quantity 值。我没有在上面的代码中，但你可以很容易地做到，只要告诉我，我会修改。

编辑：如果您将代码复制并粘贴到 Transform Message 处理器中，Studio 将显示错误——此错误是误报，打开预览或更好地粘贴 HTTP Listener 到源并试一试 :)

Answer 2

我讨厌xml。但这是我的尝试。希望对你有帮助。

%dw 2.0
output application/json
var data =  [
    {
     "ClientId": 2,
     "Code": "string",
     "ReceivedDate": "2018-10-23",
     "ReceivedTime": "2217",
     "Warehouse": "30",
     "Quantity": "20"
   },
   {
     "ClientId": 1,
     "Code": "string",
     "ReceivedDate": "2018-10-23",
     "ReceivedTime": "2217",
     "Warehouse": "56",
     "Quantity": "20"
  },
  {
     "ClientId": 1,
     "Code": "string",
     "ReceivedDate": "2018-10-23",
     "ReceivedTime": "2217",
     "Warehouse": "70",
     "Quantity": "20"
  }
]

var clients = (data orderBy $.ClientId groupBy $.ClientId)
---
{
    Receipt: clients mapObject (v,k,i) -> {client @(clientId: k): {
        code: v.Code[0]
    } ++ ((v map (item,ind) -> {
        Lines: {
            Warehouse: item.Warehouse,
            Quantity: item.Quantity
        }
    }) reduce (value, acc={}) -> acc ++ value)
    }
}

给出输出：

<?xml version='1.0' encoding='UTF-8'?>
<Receipt>
  <client clientId="1">
    <code>string</code>
    <Lines>
      <Warehouse>56</Warehouse>
      <Quantity>20</Quantity>
    </Lines>
    <Lines>
      <Warehouse>70</Warehouse>
      <Quantity>20</Quantity>
    </Lines>
  </client>
  <client clientId="2">
    <code>string</code>
    <Lines>
      <Warehouse>30</Warehouse>
      <Quantity>20</Quantity>
    </Lines>
  </client>
</Receipt>

如何在 Mule4 中使用 groupBy 和 Array to XMl 上的 orderBy

How to use groupBy with orderBy on Array to XMl in Mule4

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