jq 如何获取特定孩子的所有父母

Question

您好，我有以下 json 并尝试获取所有拥有“linux-image-amd64”的父母

{
    "web-prode-01.example.de": "ERROR: Problem encountered installing package(s). Additional info follows:\n\nchanges:\n    ----------\n    linux-image-amd64:\n        ----------\n        new:\n        old:\n            6.1.55-1\nerrors:\n    - Running scope as unit: run-rad31bddd35ec452b9d67fef004ce3daf.scope\n      E: Sub-process /usr/bin/dpkg returned an error code (1)",
    "web-prode-04.example.de": {
        "linux-image-amd64": {
            "old": "5.10.197-1",
            "new": "5.10.205-2"
        },
        "linux-image-5.10.0-27-amd64": {
            "old": "",
            "new": "5.10.205-2"
        }
    },
    "lmrelaunch.example.de": {
        "linux-image-6.1.0-0.deb11.13-amd64": {
            "old": "",
            "new": "6.1.55-1~bpo11+1"
        },
        "linux-image-amd64": {
            "old": "6.1.38-4~bpo11+1",
            "new": "6.1.55-1~bpo11+1"
        }
    }   
}

我尝试了

jq -r 'keys[] as $k | "\($k) \(.[$k]."linux-image-amd64")"'

，但我只得到了一个条目而不是两个

Answer 1

to_entries[] | select(.value | type == "object" and has("linux-image-amd64")) | .key

工作演示在这里

退货：

"web-prode-04.example.de"
"lmrelaunch.example.de"

Answer 2

您应该检查上下文是否

has

该键。另外，为了防止字符串在尝试应用

has

时失败，可以过滤

objects

，或者使用

?

抑制错误。无论哪种情况，请使用此条件使用

select

过滤结果。

keys[] as $k | .[$k] | objects | select(has("linux-image-amd64"))
# or
keys[] as $k | .[$k] | select(has("linux-image-amd64")?)

{
  "linux-image-6.1.0-0.deb11.13-amd64": {
    "old": "",
    "new": "6.1.55-1~bpo11+1"
  },
  "linux-image-amd64": {
    "old": "6.1.38-4~bpo11+1",
    "new": "6.1.55-1~bpo11+1"
  }
}
{
  "linux-image-amd64": {
    "old": "5.10.197-1",
    "new": "5.10.205-2"
  },
  "linux-image-5.10.0-27-amd64": {
    "old": "",
    "new": "5.10.205-2"
  }
}

然后您可以使用

$k

构建输出，例如：

keys[] as $k | .[$k] | select(has("linux-image-amd64")?) | $k

lmrelaunch.example.de
web-prode-04.example.de