Nifi jolt：将JSON对象平移到JSON对象列表

Question

{
  "timestamp": 1559347670,
  "p_7_1_0": 6,
  "px_2_7_1_0": 1,
  "pv_7_1_1": 1
}

预期输出JSON：

{
  "values": [
    {
      "key": "p_7_1_0",
      "value": 6,
      "timestamp": 1559347670
    },
    {
      "key": "px_2_7_1_0",
      "value": 1,
      "timestamp": 1559347670
    },
    {
      "key": "pv_7_1_1",
      "value": 1,
      "timestamp": 1559347670
    }
  ]
}

提前致谢

Answer 1

阅读完这个问题后，使用JOLT转换沿数组复制单个值

答案https://stackoverflow.com/a/50438480/2733184

我看得出来你想要的东西出奇的相似。然而，我决不会把需要问的问题一针见血。

[
  {
    "operation": "shift",
    "spec": {
      "timestamp": "timestamp",
      // put everything but the timestamp in a member (the pivot)
      "*": "all.&"
    }
  },
  {
    "operation": "shift",
    "spec": {
      "all": {
        "*": {
          // grab the member key and put it in its final place
          "$": "values[#2].key",
          // grab the member value and put it in its final place
          "@": "values[#2].value",
          // Walk back two steps (* -> all -> root) and grab the timestamp
          "@(2,timestamp)": "values[#2].timestamp"
          // I wish I understood the logic behind "#2" but I don't
          // and I'll have to read on it further
        }
      }
    }
  }
]