在jq中返回键/值对
[英]Return key/value pairs in jq
问题描述
I have the following json output (generated by ansible) and a seemingly easy task of pulling a few key/value pairs out with jq . 
我有以下json输出（由ansible生成）和一个看似简单的任务，它通过jq提取了一些键/值对。 However, I can't seem to get the output I want. 但是，我似乎无法获得所需的输出。
{
"custom_stats": {},
"plays": [
{
"play": {
"id": "001dd8b7-1cca-07c6-2280-00000000043a",
"name": "Ansible Ad-Hoc"
},
"tasks": [
{
"hosts": {
"hostname01-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname02-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname03-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname04-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname05-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname06-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname07-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname01-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname02-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname03-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname04-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname05-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname01-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname02-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname03-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname04-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname05-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname06-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
},
"hostname07-con": {
"_ansible_no_log": false,
"_ansible_verbose_always": true,
"action": "debug",
"changed": false,
"hw_system_serial": "<SERIALNUMBER>"
}
},
"task": {
"id": "001dd8b7-1cca-07c6-2280-00000000043c",
"name": "debug"
}
}
]
}
],
"stats": {
"hostname01-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname02-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname03-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname04-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname05-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname06-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname07-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname01-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname02-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname03-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname04-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname05-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname01-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname02-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname03-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname04-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname05-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname06-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
},
"hostname07-con": {
"changed": 0,
"failures": 0,
"ok": 1,
"skipped": 0,
"unreachable": 0
}
}
} }
Basically I'd just like the key of the inner-most object along with its value for hw_system_serial , returned on the same line. 基本上，我只想将最里面的对象的键以及它的hw_system_serial值返回到同一行。 Something like this: 像这样：
hostname01-con: <SERIAL_NUMBER_1>
hostname02-con: <SERIAL_NUMBER_2>
etc
I feel like this should be trivial (I could have written a little ruby or python script in this time...), but try as I might I can't get it correct. 我觉得这应该是微不足道的（这次我可能写了一些ruby或python脚本...），但是尝试一下可能无法正确理解。 I've tried all sorts of things, but I either end up iterating over the list of hosts for every serial number or returning two separate lists (one hosts and one serial numbers). 我已经尝试了各种各样的方法，但是最后要么遍历每个序列号的主机列表，要么返回两个单独的列表（一个主机和一个序列号）。
For example, this: 例如，这：
.plays[].tasks[].hosts | keys as $hosts | .[].hw_system_serial as $serial | $hosts | join(": ") + $serial
returns a list of every host name on a single line followed by one serial number. 返回一行中每个主机名的列表，后跟一个序列号。
I think it will work if I can convert $serial to an array, but my attempts to use split() have also failed (eg $serial | split("\\r") returns a list of single-item arrays rather than an array of items). 我认为 ，如果我可以将$serial转换$serial数组，则可以使用，但是我使用split()尝试也失败了（例如， $serial | split("\\r")返回单项数组而不是数组的列表）项）。
What am I missing here? 我在这里想念什么？ I feel like jq should have an easy time with this (again, any scripting language with a JSON parser...), but is it just not the right tool for the job? 我觉得jq对此应该很轻松（再次，任何带有JSON解析器的脚本语言...），但这是否不是正确的工具？
1 个解决方案
解决方案1
2 已采纳 2018-12-15 18:06:06
Yes, this is feasible for jq tool: 是的，这对于jq工具是可行的：
jq -r '.plays[].tasks[].hosts | to_entries[] | "\(.key +": "+ .value.hw_system_serial)"' input.json
The output: 输出：
hostname01-con: <SERIALNUMBER>
hostname02-con: <SERIALNUMBER>
hostname03-con: <SERIALNUMBER>
hostname04-con: <SERIALNUMBER>
hostname05-con: <SERIALNUMBER>
hostname06-con: <SERIALNUMBER>
hostname07-con: <SERIALNUMBER>
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