如何在Ansible中为字典添加缺失的results键

可以通过Ansible的set_fact模块结合循环和字典合并操作，为testing列表中缺少results键的条目统一添加值为"not exist"的该键，实现结构统一。

示例Playbook代码 #

- name: 处理testing变量，补充缺失的results字段
  hosts: localhost
  vars:
    testing: 
      - failed: "yes"
        msg: "anothermessage"
      - results:
          - url: "ip:port"
            json:
              messages: 
                - message: "yepp"
                  severity: "ok"
        failed: "yes"
        msg: "ikan"
      - failed: "no"
        msg: "anothermessageyeay"  
  tasks:
    - name: 生成处理后的testing变量
      set_fact:
        testing_processed: "{{ testing_processed | default([]) + [item | combine({'results': 'not exist'}, recursive=False) if 'results' not in item else item] }}"
      loop: "{{ testing }}"

    - name: 查看处理结果
      debug:
        var: testing_processed

代码说明 #

• 用loop遍历原testing列表的每一个条目
• 通过'results' not in item判断当前条目是否缺失results键
• 若缺失，使用combine方法将{'results': 'not exist'}合并到当前条目（recursive=False确保不会递归修改已有结构）；若已存在results键，则直接保留原条目
• 所有处理后的条目会被收集到testing_processed变量中

处理后的输出结果 #

testing_processed: 
  - results: "not exist"
    failed: "yes"
    msg: "anothermessage"
  - results:
      - url: "ip:port"
        json:
          messages: 
            - message: "yepp"
              severity: "ok"
    failed: "yes"
    msg: "ikan"
  - results: "not exist"
    failed: "no"
    msg: "anothermessageyeay"     

内容的提问来源于stack exchange，提问作者asking