json - jq - setpath - 无法用数字索引对象

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

仍然出现错误:

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？

问候和感谢，雷迪

Answer 1

您不能使用整数索引作为 JSON 对象中的键。对于 JSON 对象，键必须是一个字符串，所以你可以这样写:

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
  }
}