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json - 如何从 vmware_guest_disk_facts 获取字典条目

问题描述

我正在尝试获取特定硬盘的数据存储名称，但我未能成功找出在列表中选择一个条目。

此输出来自 ansible 模块“vmware_guest_disk_facts”，我将此输出保存到名为“vm_info”的变量中。

   "guest_disk_facts": {
        "0": {
            "backing_filename": "stuffstuff",
            "capacity_in_kb": 106954752,
            "backing_eagerlyscrub": false,
            "backing_datastore": "WHAT I REALLY WANT",
            "backing_writethrough": false,
            "label": "Hard disk 1",
            "backing_type": "FlatVer2",
            "key": 2000,
            "capacity_in_bytes": 109521666048,
            "backing_thinprovisioned": false,
            "controller_key": 1000,
            "summary": "106,954,752 KB",
            "unit_number": 0,
            "backing_uuid": "info"
        },
        "1": {
            "backing_filename": "stuffstuff",
            "capacity_in_kb": 15728640,
            "backing_eagerlyscrub": false,
            "backing_datastore": "DON'T CARE OF ABOUT THIS ONE",
            "backing_writethrough": false,
            "label": "Hard disk 2",
            "backing_type": "FlatVer2",
            "key": 2001,
            "capacity_in_bytes": 16106127360,
            "backing_thinprovisioned": false,
            "controller_key": 1000,
            "summary": "15,728,640 KB",
            "unit_number": 1,
            "backing_uuid": "info"
        }

    - debug:
        msg: "{{ item.guest_disk_facts | json_query(query) }}"
      with_items: "{{ vm_info.results }}"
      vars:
        query: "guest_disk_facts.0.backing_datastore" #done w/ & w/o quotes around 0

我还尝试了以下查询，我觉得此时我已经用尽了所有选项。

    query: "guest_disk_facts.[0].backing_datastore"#done w/ & w/o quotes around 0

    query: "guest_disk_facts[0].backing_datastore" #done w/ & w/o quotes around 0

    query: "guest_disk_facts.*.backing_datastore" #will give me backing_datastore entries for both dictionaries in this case

我只想为这个字典列表中的一个条目获取 backing_datastore

味精：“我真正想要的”

但到目前为止，我返回了这个错误：

期望：['quoted_identifier', 'unquoted_identifier', 'lbracket', 'lbrace']，得到：数字：第 17 列的解析错误，标记 \"0\" (NUMBER)，用于表达式

或者

味精：“”

或者

味精：[

"0",

]

标签： jsonansibleyamlvmware

解决方案

下面的任务给出了“你真正想要的”

- debug:
    msg: "{{ guest_disk_facts['0'|quote].backing_datastore }}"

重点是引用引用的键。键 '0' 和 '1' 不是有效变量，必须加引号。

下面的循环

- debug:
    msg: "{{ guest_disk_facts[item|quote].backing_datastore }}"
  loop: "{{ guest_disk_facts.keys() }}"

给

ok: [localhost] => (item=1) => 
  msg: DON'T CARE OF ABOUT THIS ONE
ok: [localhost] => (item=0) => 
  msg: WHAT I REALLY WANT

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