Dataweave -使用另一个键作为keyName一部分的选择器

Question

我有一个这样的message.payload：

...
    "data": {
        "itemType": 177,
        "fields": {
           "initial_conditions$177": "<p>Sample data</p>",
            "input_signals$177": "<p>Sample data</p>",
            "intermediate_signals$177": "<p>Sample data</p>",
            "output_signals$177": "<p>Sample data</p>",
            "hil_input_signals$177": "<p>Sample data</p>",
...

$177是有效负载(data.itemtype)中的另一个字段，但我不知道如何构建它：

{
    "customfield_12507": message.payload.data.hil_use_case$177,
    "customfield_12508": message.payload.data.initial_conditions$177,
    "customfield_12509": message.payload.data.input_signals$177,
    "customfield_12510": message.payload.data.intermediate_signals$177,
    "customfield_12511": message.payload.data.output_signals$177,
    "customfield_12512": message.payload.data.hil_input_signal$177s,
}

欢迎任何指点！

Answer 1

我不确定我是否在跟踪，可能需要一个完整的有效负载和样本输出，但这是您正在尝试做的吗？

输入：

{
    "data": {
        "itemType": 177,
        "fields": {
        "initial_conditions$177": "<p>Sample data - changed to make more obvious</p>",
            "input_signals$177": "<p>Sample data</p>",
            "intermediate_signals$177": "<p>Sample data</p>",
            "output_signals$177": "<p>Sample data</p>",
            "hil_input_signals$177": "<p>Sample data</p>"
        }
    }
}

数据编织(只做了一个字段)

%dw 2.0
output application/json
---
{
    "customfield_12508": payload.data.fields["initial_conditions\$$(payload.data.itemType)"]
}

哪种输出

{
  "customfield_12508": "<p>Sample data - changed to make more obvious</p>"
}