如何从 Ansible 字典中删除单个键? [英] How to remove a single key from an Ansible dictionary?

问题描述

我想从 Ansible 的字典中删除一个键.

I'd like to remove a single key from a dictionary in Ansible.

例如，我想要这样:

- debug: var=dict2
  vars:
    dict:
      a: 1
      b: 2
      c: 3
    dict2: "{{ dict | filter_to_remove_key('a') }}"

打印:

ok: [localhost] => {
    "dict2": {
        "b": 2,
        "c": 3
    }
}

请注意，字典是从 json 文件加载的，我将其发布到 Grafana REST API.我想允许在文件中保存一个id"键并在发布之前删除它.

Please note that the dictionary is loaded from a json file and I POST it to the Grafana REST API. I'd like to allow saving an 'id' key in the file and remove the key before POSTing it.

这更接近我删除的实际用途:

This is closer to the actual use I have for the removal:

- name: Install Dashboards   
  uri:
    url: "{{ grafana_api_url }}/dashboards/db"
    method: POST
    headers:
      Authorization: Bearer {{ grafana_api_token }}
    body:
      overwrite: true
      dashboard:
        "{{ lookup('file', item) | from_json | removekey('id') }}"
    body_format: json   with_fileglob:
    - "dashboards/*.json"
    - "../../../dashboards/*.json"

推荐答案

- set_fact:
    dict:
      a: 1
      b: 2
      c: 3
    dict2: {}

- set_fact:
    dict2: "{{dict2 |combine({item.key: item.value})}}"
  when: "{{item.key not in ['a']}}"
  with_dict: "{{dict}}"

- debug: var=dict2

或者创建一个过滤器插件并使用它.

or create a filter plugin and use it.

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