Ansible中如何提取environment_ids为空的Foreman内容视图版本号

我需要从给定的Ansible数据集item里，提取versions列表中environment_ids为空数组的条目对应的version字段值，用来通过theforeman.foreman.content_view_version模块删除Foreman里未使用的旧内容视图版本。但我之前写的Jinja2表达式{{ (item.resources| map(attribute='version') | list ) }}无法实现需求，以下是示例数据集：

item:
- auto_publish: false
  component_ids:
  - 10
  - 11
  environments:
  - activation_keys:
    - 1
    hosts: []
    id: 1
    label: Library
    name: Library
    permissions:
      readable: true
  - activation_keys: []
    hosts: []
    id: 2
    label: DEV
    name: DEV
    permissions:
      readable: true
  - activation_keys: []
    hosts: []
    id: 3
    label: PROD
    name: PROD
    permissions:
      readable: true
  generated_for: none
  hosts: []
  id: 4
  import_only: false
  label: system-tester
  last_published: 2023-07-17 14:15:24 UTC
  name: comp Repo (noarch)
  version_count: 2
  versions:
  - environment_ids:
    - 1
    - 2
    - 3
    id: 9
    published: 2023-07-17 14:03:01 UTC
    version: '2.0'
  - environment_ids:
    - 1
    - 2
    - 3
    id: 12
    published: 2023-07-17 14:15:24 UTC
    version: '2.1'
- auto_publish: false
  component_ids:
  - 10
  - 11
  environments:
  - activation_keys:
    - 1
    hosts: []
    id: 1
    label: Library
    name: Library
    permissions:
      readable: true
  - activation_keys: []
    hosts: []
    id: 2
    label: DEV
    name: DEV
    permissions:
      readable: true
  - activation_keys: []
    hosts: []
    id: 3
    label: PROD
    name: PROD
    permissions:
      readable: true
  generated_for: none
  hosts: []
  id: 4
  import_only: false
  label: system-tester2
  last_published: 2023-07-17 14:15:24 UTC
  name: comp Repo (noarch)
  version_count: 2
  versions:
  - environment_ids: []
    id: 9
    published: 2023-07-17 14:03:01 UTC
    version: '2.0'
  - environment_ids:
    - 1
    - 2
    - 3
    id: 12
    published: 2023-07-17 14:15:24 UTC
    version: '2.1'
- activation_keys:
  - id: 3
    name: lx
  auto_publish: false
  component_ids:
  - 10
  - 11
  environments:
  - activation_keys:
    - 1
    hosts: []
    id: 1
    label: Library
    name: Library
    permissions:
      readable: true
  - activation_keys: []
    hosts: []
    id: 2
    label: DEV
    name: DEV
    permissions:
      readable: true
  - activation_keys: []
    hosts: []
    id: 3
    label: PROD
    name: PROD
    permissions:
      readable: true
  generated_for: none
  hosts: []
  id: 4
  import_only: false
  label: system-tester3
  last_published: 2023-07-17 14:15:24 UTC
  name: comp Repo (noarch)
  version_count: 2
  versions:
  - environment_ids: []
    id: 9
    published: 2023-07-17 14:03:01 UTC
    version: '2.0'
  - environment_ids:
    - 1
    - 2
    - 3
    id: 12
    published: 2023-07-17 14:15:24 UTC
    version: '2.1'

解决方案 #

单条目处理表达式

如果只处理单个内容视图条目（即item是列表中的单个元素），使用以下Jinja2表达式：

{{ item.versions | selectattr('environment_ids', 'equalto', []) | map(attribute='version') | list }}

批量处理逻辑

如果要遍历整个item列表处理所有内容视图，用循环包裹筛选逻辑：

{% for cv in item %}
  {% set unused_versions = cv.versions | selectattr('environment_ids', 'equalto', []) | map(attribute='version') | list %}
  # 此处调用theforeman.foreman.content_view_version模块，传入unused_versions执行删除
{% endfor %}

表达式说明

• selectattr('environment_ids', 'equalto', [])：精准筛选出environment_ids为空数组的版本条目
• map(attribute='version')：从筛选后的条目中提取version字段值
• list：将结果转换为列表格式，适配Ansible模块的参数要求

示例验证

基于提供的数据集，运行结果如下：

• system-tester条目：无符合条件的版本，结果为[]
• system-tester2/system-tester3条目：结果为['2.0']

内容的提问来源于stack exchange，提问作者Eric