JOLT字符串的JSON数组

我正在尝试将字符串数组转换为常规字符串。但在我的规范文件中，它总是以数组的形式返回

样本输入（来自ES）

输出：

{
  "Response" : [ {
    "firstName" : "test",
    "h_message" : [ "some message with the <em>number</em> <em>1</em>" ]
  } ],
  "total_hits" : 1
}

{
“答复”：[{
“firstName”：“test”，
“h_消息”：[“数字为1的消息”]
} ],
“总点击数”：1
}

正如您所看到的，“h_message”以数组的形式出现，我试图得到的是一个字符串/值

 "h_message" : [ "some message with the <em>number</em> <em>1</em>" ]

“h_消息”：[“数字为1的消息”]

解决了它

[
  {
    "operation": "shift",
    "spec": {
      "took": "took",
      "hits": {
        "total": "total_hits",
        "hits": {
          "*": {
            "_source": {
              "user": "Response[&2].firstName"
            },
            "highlight": {
              "message": {
                "*": "Response[&0].h_message"
              }
            }
          }
        }
      }
    }
}
]

 "h_message" : [ "some message with the <em>number</em> <em>1</em>" ]

[
  {
    "operation": "shift",
    "spec": {
      "took": "took",
      "hits": {
        "total": "total_hits",
        "hits": {
          "*": {
            "_source": {
              "user": "Response[&2].firstName"
            },
            "highlight": {
              "message": {
                "*": "Response[&0].h_message"
              }
            }
          }
        }
      }
    }
}
]