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Question

谁能帮我把这个 dataweave 转换成目标格式？基本上将项目转换为数组。

我什至开始了，但不确定如何继续。任何建议都会有所帮助

  payload mapObject(order,key,index) -> {

         ((key):order) if ! (key  contains "Item_"),
    }

输入：

{
    "id": "1",
    "Item_1_ID": "43-583-0978",
    "Item_1_Name": "Sodium Chloride",
    "Item_1_Quantity": "26",
    "Item_1_Price": "802.41",
    "Item_2_ID": "71-788-5293",
    "Item_2_Name": "Ciprofloxacin",
    "Item_2_Quantity": "100",
    "Item_2_Price": "608.64",
   }

输出：

{
    "id": "1",
    Items:[{
        "ID":"43-583-0978",
        "Name": "Sodium Chloride",
        "Price": "802.41",
        "Quantity": "26",
    },
    {
        "ID":"71-788-5293",
        "Name": "Ciprofloxacin",
        "Price": "100",
        "Quantity": "608.64",
    }]

  }

Answer 1

这里有您所请求问题的解决方案。它使用一些正则表达式来提取键的部分，然后 groupBy 和 pluck 函数按 Id 编号进行分组，并将 groupBy 结果转换为数组并转换键。

%dw 2.0
output application/json
fun getItemNumber(keyName:String) = 
    (keyName scan /Item_(\d+)/)[0][1]

fun getKeyName(keyName:String) = 
    (keyName scan /Item_[\d+]_(.*)/)[0][1]    
---
{
    "Id" : payload.id,
    "Item": (payload - "id") 
                groupBy ((value, key) -> //Group it by ID
                            getItemNumber(key as String)
                        ) 
                pluck ((value, key, index) -> //Go through all the values of the groups and take the real keys
                        value mapObject ((value, key, index) -> {
                            (getKeyName(key)): value
                        })
                    )        
}

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