嵌套的 Jinja2 字典有价值的东西正在消失

Question

我正在使用 ansible 和 jinja2，需要访问一个变量。

我有一个数据结构 structure，并在剧本中执行：

  - name: debug_1
    debug:
      msg: "{{ vars['structure'] }}"

产生这些结果：

ok: [debug-test] => {
    "msg": {
        "Covo": [
            {
                "enabled": true
            }
        ]
    }
}

此外，运行

  - name: debug_1
    debug:
      msg: "{{ vars['structure']['covo'] }}"

给出了预期的结果：

ok: [debug-test] => {
    "msg": [
        {
            "enabled": true
        }
    ]
}

但是，尝试访问 enabled 变量：

  - name: debug_1
    debug:
      msg: "{{ vars['structure']['covo']['enabled'] }}"

会抛出错误：

fatal: [debug-test]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'list object' has no attribute 'enabled'\n\nThe error appears to be in '/task/main.yml': line 16, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n    when: vars['structure']['covo']['enabled']|default(False) == True\n  - name: debug_1\n    ^ here\n"}

如何访问这个变量？

Answer 1

covo是数组，所以要声明索引：

  - name: debug_1
    debug:
      msg: "{{ vars['structure']['covo'][0]['enabled'] }}"

嵌套的 Jinja2 字典有价值的东西正在消失

Nested Jinja2 dictionary valuable is disappearing

jinja2

ansible