jq - 如何在不知道键的情况下过滤内部数组中的值

Question

我有以下 JSON：

{
  "ids": {
    "sda": [
      "scsi-0QEMU_QEMU_HARDDISK_drive-scsi2"
    ],
    "sdb": [
      "scsi-0QEMU_QEMU_HARDDISK_drive-scsi0"
    ],
    "sdb1": [
      "lvm-pv-uuid-lvld3A-oA4k-hC19-DXzv-D0Fq-xyME-BwgJid",
      "scsi-0QEMU_QEMU_HARDDISK_drive-scsi0-part1"
    ],
    "sdc": [
      "lvm-pv-uuid-pWes2W-dgYF-l8hG-La48-9ozH-hPdU-MOkOtf",
      "scsi-0QEMU_QEMU_HARDDISK_drive-scsi1"
    ]
  }
}

我想要实现的是在内部数组的值中搜索.*scsi0$并获得sdb作为结果。

Answer 1

使用JSON jq endswith过滤结果：

.ids | to_entries[] | select(.value[] | endswith("scsi0")) | .key

结果是：

"sdb"

在这里试试： https ://jqplay.org/s/DAhKosXXgiA

---

首先获取.ids ：

{
  "sda": [
    "scsi-0QEMU_QEMU_HARDDISK_drive-scsi2"
  ],
  "sdb": [
    "scsi-0QEMU_QEMU_HARDDISK_drive-scsi0"
  ],
  "sdb1": [
    "lvm-pv-uuid-lvld3A-oA4k-hC19-DXzv-D0Fq-xyME-BwgJid",
    "scsi-0QEMU_QEMU_HARDDISK_drive-scsi0-part1"
  ],
  "sdc": [
    "lvm-pv-uuid-pWes2W-dgYF-l8hG-La48-9ozH-hPdU-MOkOtf",
    "scsi-0QEMU_QEMU_HARDDISK_drive-scsi1"
  ]
}

...然后将结果通过管道传输到to_entries函数，以将其转换为{key, value}对象数组， .ids | to_entries .ids | to_entries ：

[
  {
    "key": "sda",
    "value": [
      "scsi-0QEMU_QEMU_HARDDISK_drive-scsi2"
    ]
  },
  {
    "key": "sdb",
    "value": [
      "scsi-0QEMU_QEMU_HARDDISK_drive-scsi0"
    ]
  },
  {
    "key": "sdb1",
    "value": [
      "lvm-pv-uuid-lvld3A-oA4k-hC19-DXzv-D0Fq-xyME-BwgJid",
      "scsi-0QEMU_QEMU_HARDDISK_drive-scsi0-part1"
    ]
  },
  {
    "key": "sdc",
    "value": [
      "lvm-pv-uuid-pWes2W-dgYF-l8hG-La48-9ozH-hPdU-MOkOtf",
      "scsi-0QEMU_QEMU_HARDDISK_drive-scsi1"
    ]
  }
]

...下一个流对象列表， .ids | to_entries[] .ids | to_entries[] ：

{
  "key": "sda",
  "value": [
    "scsi-0QEMU_QEMU_HARDDISK_drive-scsi2"
  ]
}
{
  "key": "sdb",
  "value": [
    "scsi-0QEMU_QEMU_HARDDISK_drive-scsi0"
  ]
}
{
  "key": "sdb1",
  "value": [
    "lvm-pv-uuid-lvld3A-oA4k-hC19-DXzv-D0Fq-xyME-BwgJid",
    "scsi-0QEMU_QEMU_HARDDISK_drive-scsi0-part1"
  ]
}
{
  "key": "sdc",
  "value": [
    "lvm-pv-uuid-pWes2W-dgYF-l8hG-La48-9ozH-hPdU-MOkOtf",
    "scsi-0QEMU_QEMU_HARDDISK_drive-scsi1"
  ]
}

...并从值流中选择， .ids | to_entries[] | select(.value[]) .ids | to_entries[] | select(.value[]) .ids | to_entries[] | select(.value[]) where value endwith "scsi0", select(.value[] | endswith("scsi0")) ：

{
  "key": "sdb",
  "value": [
    "scsi-0QEMU_QEMU_HARDDISK_drive-scsi0"
  ]
}

...最后，获取键值.ids | to_entries[] | select(.value[] | endswith("scsi0")) | .key .ids | to_entries[] | select(.value[] | endswith("scsi0")) | .key .ids | to_entries[] | select(.value[] | endswith("scsi0")) | .key ：

"sdb"

命令行：

jq '.ids | to_entries[] | select(.value[] | endswith("scsi0")) | .key'

在这里试试： https ://jqplay.org/s/DAhKosXXgiA

Answer 2

.ids | to_entries[] | select(.value[] | test(".*scsi0$")) | .key

如果数组中的任何值与您的正则表达式匹配，将打印密钥。

如果没有匹配，将没有输出。

---

to_entries用于轻松捕获对象的键。

select以过滤值

.value[] | test(".*scsi0$") .value[] | test(".*scsi0$")检查每个值到正则表达式

.key我们显示结果的关键

---

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