Nifi的JOLT转换，展平阵列和移动键

问题描述

我试图在将JSON输出移动到较低数组时对其进行扁平化。在下面的示例中，我需要将所有内容都保留在“值”下，还将“时间戳记”移到值结果中。有什么提示或文档可以帮助您吗？

谢谢！

输入：

{   "readings": [
    {
      "meter": "78522546","records": [
        {
          "timestamp": "22/02/2019 17:10:00","values": {
            "DateTime": 1550848206,"ExportWh": 2136.5,}
        },{
          "timestamp": "22/02/2019 17:15:00",}
        }
      ]
    },{
      "meter": "78522548","records": [
        {
          "timestamp": "22/02/2019 17:15:00","values": {
            "DateTime": 1550848246,"ExportWh": 0,{
      "meter": "78522570","values": {
            "DateTime": 1550848226,"ExportWh": 3152012603293.037,{
      "meter": "78522572","values": {
            "DateTime": 1550848236,"ExportWh": 1112.172,{
      "meter": "78522589","values": {
            "DateTime": 1550848217,}
        }
      ]
    }   ] }

所需的输出：

{
    "timestamp": "22/02/2019 17:10:00","DateTime": 1550848206,"ExportWh": 2136.5
},{
    "timestamp": "22/02/2019 17:15:00","DateTime": 1550848246,"ExportWh": 0
},{
    "timestamp": "22/02/2019 17:10:00","DateTime": 1550848226,"ExportWh": 3152012603293.037
},"DateTime": 1550848236,"ExportWh": 1112.172
},"DateTime": 1550848217,"ExportWh": 0
}

这是我对规范的理解程度，但从这里继续绕行：

[
  {
    "operation": "shift","spec": {
      "readings": {
        "*": {
          "records": {
            "*": {
              "timestamp": "&","@(0,values)": ""
            }
          }
        }
      }
    }
  }
]

解决方法

检查此规范

[
  {
    "operation": "shift","spec": {
      "readings": {
        "*": {
          "records": {
            "*": {
              "values": {
                "@": "[].@(2,timestamp)"
              }
            }
          }
        }
      }
    }
  },{
    "operation": "shift","spec": {
      "*": {
        "*": {
          "@": "[]","$": "[&2].timestamp"
        }
      }
    }
  }
]