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How to use Ansible extract filter in map with an external dictionary

+1

−0

Ansible's extract filter is supposedly made for use in map, but at the time of writing the documentation doesn't actually show how to use it together with the map filter.

The following outputs VARIABLE IS NOT DEFINED!, so clearly it's missing something. I would like it to output [1, 2].

- name: Extraction test
  vars:
    dictionary:
      one: 1
      two: 2
    key_list:
      - one
      - two
    extracted: "{{ key_list | map('extract', 'dictionary') }}"
  ansible.builtin.debug:
    var: extracted

ansible

posted about 1 year ago

CC BY-SA 4.0

1y ago

Iizuki‭

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+1

−0

Turns out I wasn't far off. The dictionary mustn't be quoted.

So the following works:

- name: Extraction test
  vars:
    dictionary:
      one: 1
      two: 2
    key_list:
      - one
      - two
    extracted: "{{ key_list | map('extract', dictionary) }}"
  ansible.builtin.debug:
    var: extracted