如何使用 jq 搜索 json 字符串并输出父值?

How to search json for a string and output a parent value using jq?

试图用 jq 提取一个值,但似乎并不像我最初想象的那么容易。

我有一个变量CAR="baga6e~tlwdcmli__QmbHKa~G65fMXzh.car"

如何将此变量用于 return 父 "piece_cid"

示例: 使用 $CAR 的 bash 变量,值为 baga6e~tlwdcmli__QmbHKa~G65fMXzh.car,id 能够将结果保存到$PIECE_CID 值为 baga6ea4seaqa24ucggxkliw4la4tkgvhevv3dacavovghsmnnscclt4tlwdcmli

我尝试了一些命令并在谷歌上搜索了大约 2 个小时,但没有找到我正在寻找的东西。对 jq 来说是全新的。希望有人能把我推向正确的方向?

{
  "response_code": 200,
  "response_entries": 2,
  "response": [
    {
      "piece_cid": "baga6ea4seaqa24ucggxkliw4la4tkgvhevv3dacavovghsmnnscclt4tlwdcmli",
      "dataset": "genome-ark",
      "padded_piece_size": 34359738368,
      "payload_cids": [
        "QmbHKaq6z321PqEG1BVLEAMpapq6YjkhdXpcs3G65fMXzh"
      ],
      "sources": [
        {
          "source_type": "Filecoin",
          "provider_id": "f0402371",
          "deal_id": 1928414,
          "original_payload_cid": "QmbHKaq6z321PqEG1BVLEAMpapq6YjkhdXpcs3G65fMXzh",
          "deal_expiration": "2022-05-22T21:14:30Z",
          "is_filplus": false,
          "sector_id": null,
          "sector_expires": null,
          "sample_retrieve_cmd": "lotus client retrieve --provider f0402371 --maxPrice 0 --allow-local --car 'QmbHKaq6z321PqEG1BVLEAMpapq6YjkhdXpcs3G65fMXzh' $(pwd)/baga6e~tlwdcmli__QmbHKa~G65fMXzh.car"
        }
      ],
      "sample_request_cmd": "echo curl -sLH \"Authorization: $( ./fil-spid.bash f01826669 )\" https://api.evergreen.filecoin.io/request_piece/baga6ea4seaqa24ucggxkliw4la4tkgvhevv3dacavovghsmnnscclt4tlwdcmli | sh"
    },
    {
      "piece_cid": "baga6ea4seaqa2acwhwril5pm6n4muqlsrdkk27cgrqowz67himgbcwc3jhitina",
      "dataset": "genome-ark",
      "padded_piece_size": 34359738368,
      "payload_cids": [
        "QmSJc7g8sdUZKt2MqSDnrd1DXxxHow6XwKQZLcoCoCeW42"
      ],
      "sources": [
        {
          "source_type": "Filecoin",
          "provider_id": "f0402371",
          "deal_id": 1927852,
          "original_payload_cid": "QmSJc7g8sdUZKt2MqSDnrd1DXxxHow6XwKQZLcoCoCeW42",
          "deal_expiration": "2022-05-22T20:11:00Z",
          "is_filplus": false,
          "sector_id": null,
          "sector_expires": null,
          "sample_retrieve_cmd": "lotus client retrieve --provider f0402371 --maxPrice 0 --allow-local --car 'QmSJc7g8sdUZKt2MqSDnrd1DXxxHow6XwKQZLcoCoCeW42' $(pwd)/baga6e~3jhitina__QmSJc7~oCoCeW42.car"
        }
      ],
      "sample_request_cmd": "echo curl -sLH \"Authorization: $( ./fil-spid.bash f01826669 )\" https://api.evergreen.filecoin.io/request_piece/baga6ea4seaqa2acwhwril5pm6n4muqlsrdkk27cgrqowz67himgbcwc3jhitina | sh"
    }
  ]
}

根据您期望的搜索值级别,这里有一个使用示例中所有键的非常狭窄的解决方案:首先,遍历 .response 数组,然后仅保留 [=14] =] .sources[].sample_retrieve_cmd contains 给定字符串中的值,然后使用 -r.

.piece_cid 的值输出为原始文本
CAR="baga6e~tlwdcmli__QmbHKa~G65fMXzh.car"
jq -r --arg car "$CAR" '
  .response[]
  | select(any(.sources[].sample_retrieve_cmd; contains($car)))
  | .piece_cid
'
baga6ea4seaqa24ucggxkliw4la4tkgvhevv3dacavovghsmnnscclt4tlwdcmli

Demo


编辑:要将输出保存到变量中,只需将 jq 调用包装为命令替换 $() 并将结果分配给您的变量:

PIECE_CID="$(jq -r --arg …)"

但请记住(理论上)可能存在多个匹配项,上面的解决方案将逐行打印出来(在 bash 变量中为您提供 newline-delimited 结果列表).

注意:避免在 Bash.

中使用大写变量名