从嵌套在另一个列表中的列表中提取项目

时间:2018-06-06 18:36:03

标签: ansible jinja2

我有大型变量列表(xml文件,4000多行),我通过xml-> yml转换器运行。输出yaml类似于下面的简化版本。

在模板中,我试图从另一个列表中的var文件列表中提取值。我需要来自' level4'的项目,当_type = listType1来自var文件时:

Var文件:

---
# Site-specific vars

level1:
  level2:
    -
      _type: listType1
      _instance: 1
      level3:
        level4:
         - "theImportanStuff1"
         - "theImportanStuff2"
    -
      _type: notListType1
      _instance: 1
      level3:
        level4:
         - "notImportanStuff1"
         - "notImportanStuff2"

模板文件(我尝试了许多变种,这种情况发生在最后):

# TEST FILE
# Insert Info Here6
{% for item in [level1.level2|selectattr('_type','match','listType1')|selectattr('level3.level4') | list ] %}
myInfo: {{ item }}
{% endfor %}

任务文件:

---
- name: set
  set_fact:
    testit: "{{level1.level2|selectattr('_type','match','listType1')| map(attribute='level3') | join (', ') }}"

- debug:
     msg="{{ testit }}"

- name: set2
  set_fact:
    testit2: "{{level1.level2|selectattr('_type','match','listType1')| list }}"

- debug:
     msg="{{ testit2 }}"

- name: set3
  set_fact:
    testit3: "{{level1.level2|selectattr('_type','match','listType1') }}"

- debug:
     msg="{{ testit3 }}"

# tasks file for ansible-role snmp
- name: "Gather OS specific variables"
  include_vars: "{{ item }}"
  with_first_found:
    - "{{ ansible_distribution|lower }}-{{ ansible_distribution_version }}.yml"
    - "{{ ansible_distribution|lower }}.yml"
    - "{{ ansible_os_family|lower }}.yml"

- name: Copy TEST configuration file
  template:
    src: test.conf.j2
    dest: /root/test.conf
    mode: 0600
    owner: root
    group: root

运行输出:

[root@AnsibleServer2 ansible]# ansible-playbook -i inventory/staging/host_vars/hostname2  playbook/testit.yml

PLAY [Test-c7-1] ******************************************************************************************************************************************************************

TASK [Gathering Facts] ************************************************************************************************************************************************************
ok: [Test-c7-1]

TASK [john.test : set] ************************************************************************************************************************************************************
ok: [Test-c7-1]

TASK [john.test : debug] **********************************************************************************************************************************************************
ok: [Test-c7-1] => {
    "msg": {
        "level4": [
            "theImportanStuff1",
            "theImportanStuff2"
        ]
    }
}

TASK [john.test : set2] ***********************************************************************************************************************************************************
ok: [Test-c7-1]

TASK [john.test : debug] **********************************************************************************************************************************************************
ok: [Test-c7-1] => {
    "msg": [
        {
            "_instance": 1,
            "_type": "listType1",
            "level3": {
                "level4": [
                    "theImportanStuff1",
                    "theImportanStuff2"
                ]
            }
        }
    ]
}

TASK [john.test : set3] ***********************************************************************************************************************************************************
ok: [Test-c7-1]

TASK [john.test : debug] **********************************************************************************************************************************************************
ok: [Test-c7-1] => {
    "msg": "<generator object _select_or_reject at 0x1aa9730>"
}

TASK [john.test : Gather OS specific variables] ***********************************************************************************************************************************
ok: [Test-c7-1] => (item=/etc/ansible/roles/john.test/vars/redhat.yml)

TASK [john.test : Copy TEST configuration file] ***********************************************************************************************************************************
ok: [Test-c7-1]

PLAY RECAP ************************************************************************************************************************************************************************
Test-c7-1                  : ok=9    changed=0    unreachable=0    failed=0

我尝试的所有内容都无法运行,或者将其中一个添加到test.conf中的值:

myInfo: <generator object _select_or_reject at 0x1b93cd0>

myInfo: [{u'_type': u'listType1', u'level3': {u'level4': [u'theImportanStuff1', u'theImportanStuff2']}, u'_instance': 1}]

我希望看到:

myInfo: theImportanStuff1
myInfo: theImportanStuff2

1 个答案:

答案 0 :(得分:1)

如果您的NoSuchKey条件仅返回单个元素:

_type = listType1

如果您的{% for item in (level1.level2|selectattr('_type','match','listType1') | first).level3.level4 %} myInfo: {{ item }} {% endfor %} 条件返回一个列表,则需要两个循环,但从您的问题中的剥离示例中不清楚在这种情况下您要打印的内容。无论如何,模板是:

_type = listType1