在ansible playbook的嵌套循环中遍历字典列表答案

【问题标题】：Looping over list of dictionaries over a list of dictionaries in a nested loop in ansible playbook在ansible playbook的嵌套循环中遍历字典列表
【发布时间】：2021-02-04 18:30:43
【问题描述】：

我需要在嵌套循环中遍历另一组 dicts 列表的 dicts 列表，以从我得到的输出中读取所有值。我是 ansible 的新手，也尝试过 with_items、loop、with_subelements 和 with_nested。没有什么能满足我从输出中读取所有值的需要。有人可以阐明我们如何进行嵌套循环吗？非常感谢您的帮助。

Outer-List: [    
  { 
     Key1: value1
     Key2: value2          
     Inner-List: [ 
        {
            Key31: value-A
            Key32: value-B
        }
        {
            Key33: value-C
            Key34: value-D
        }
     ],
  },              ====> OuterList[0] ends here
  {               ====> OuterList[1] starts here
     Key1: value1
     Key2: value2
     Inner-List: [       
        {
            Key31: value-E
            Key32: value-F
        }
        {
            Key33: value-G
            Key34: value-H
        }
     ],
   }              ====> OuterList[1] ends here
]                 ====> OuterList ends here

【问题讨论】：

标签： dictionary ansible nested-loops

【解决方案1】：

问：“循环遍历字典列表。”

A：给定一个有效的YAML 和有效的Ansible variable

Outer_List:
  - Inner-List: 
      - Key31: value-A
        Key32: value-B
      - Key33: value-C
        Key34: value-D
    Key1: value1
    Key2: value2
  - Inner-List: 
      - Key31: value-E
        Key32: value-F
      - Key33: value-G
        Key34: value-H
    Key1: value1
    Key2: value2

使用subelements。比如下面的任务

    - debug:
        msg: "{{ item.0.Key1 }} {{ item.0.Key2 }} {{ item.1 }}"
      with_subelements:
        - "{{ Outer_List }}"
        - Inner-List

给予（删节）

  msg: 'value1 value2 {''Key31'': ''value-A'', ''Key32'': ''value-B''}'
  msg: 'value1 value2 {''Key33'': ''value-C'', ''Key34'': ''value-D''}'
  msg: 'value1 value2 {''Key31'': ''value-E'', ''Key32'': ''value-F''}'
  msg: 'value1 value2 {''Key33'': ''value-G'', ''Key34'': ''value-H''}'

如果需要，下面是有效的JSON

{
"Outer_List":
    [
        {
            "Inner-List": [
                {
                    "Key31": "value-A",
                    "Key32": "value-B"
                },
                {
                    "Key33": "value-C",
                    "Key34": "value-D"
                }
            ],
            "Key1": "value1",
            "Key2": "value2"
        },
        {
            "Inner-List": [
                {
                    "Key31": "value-E",
                    "Key32": "value-F"
                },
                {
                    "Key33": "value-G",
                    "Key34": "value-H"
                }
            ],
            "Key1": "value1",
            "Key2": "value2"
        }
    ]
}

【讨论】：