jq - setpath - 无法使用数字索引对象

Question

我想在现有文档中添加新路径

./jq  < test.json
{
  "correlationId": "6298865a73b477106c98d021",
  "leg": 0,
  "tag": "sent",
  "offset": 322858,
  "len": 178,
  "prev": {
    "page": {
      "file": 10352,
      "page": 2
    },
    "record": 911
  },
  "data": "HTTP/1.1 403 Forbidden\r\nDate: Fri, 16 Feb 2018 08:37:54 GMT\r\nServer: \r\nConnection: close\r\nX-CorrelationID: Id-6298865a73b477106c98d021 0\r\nContent-Type: text/html\r\n\r\nAccess Denied"
}

我正在使用jq手册中描述的过滤器setpath。但即使我复制了记录的字符串

./jq 'setpath([0,"a"]; 1)'  < test.json

仍然得到错误：

jq: error (at <stdin>:1): Cannot index object with number

我没有看到任何语法问题。我忽略了什么吗？

关心并感谢，雷迪

Answer 1

您不能将整数索引用作JSON对象中的键。对于JSON对象，键必须是字符串，因此您可以编写：

jq 'setpath(["0","a"]; 1)'  < test.json

输出：

{
  "correlationId": "6298865a73b477106c98d021",
  "leg": 0,
  "tag": "sent",
  "offset": 322858,
  "len": 178,
  "prev": {
    "page": {
      "file": 10352,
      "page": 2
    },
    "record": 911
  },
  "data": "HTTP/1.1 403 Forbidden\r\nDate: Fri, 16 Feb 2018 08:37:54 GMT\r\nServer: \r\nConnection: close\r\nX-CorrelationID: Id-6298865a73b477106c98d021 0\r\nContent-Type: text/html\r\n\r\nAccess Denied",
  "0": {
    "a": 1
  }
}