CODEWITHSUNDEEP
linuxansible
medisamm
medisamm

Reputation: 331

Ansible loop over a list to define a dynamic dictionary

I am trying to define a dictionary FACTS_VAR in which the key must contain the word SUB. Argument_value and the value is true but when I loop over the variable Argument

hosts: all
gather_facts: true

vars:

  Argument:
    - value1
    - value2                      

tasks:

- name: DEFINING A variable
  set_fact:
    FACTS_VAR: {'SUB..item': true}
  loop: "{{Argument}}"

- debug:
    var: FACTS_VAR

I got this result so I don't know what is missing there. I am expecting to get a dictionary like this

FACTS_ENTRY:
   SUB.value1: true
   SUB.value2: true


TASK [debug] *****************************************************************************************************************
ok: [control] => {
    "FACTS_ENTRY": {
        "SUB..item": true
    }
}
ok: [ansible4] => {
    "FACTS_ENTRY": {
        "SUB..item": true
    }

Upvotes: 0

Views: 236

Answers (2)

Vladimir Botka
Vladimir Botka

Reputation: 68229

Create the keys

facts_entry_keys: "{{ ['sub']|product(argument)|map('join','.')|list }}"

gives

facts_entry_keys:
  - sub.value1
  - sub.value2

Create the dictionary

facts_entry: "{{ dict(facts_entry_keys|product([true])) }}"

gives

facts_entry:
  sub.value1: true
  sub.value2: true

Example of a complete playbook

- hosts: localhost
  vars:
    argument:
      - value1
      - value2
    facts_entry_keys: "{{ ['sub']|product(argument)|map('join','.')|list }}"
    facts_entry: "{{ dict(facts_entry_keys|product([true])) }}"
  tasks:
    - debug:
        var: facts_entry

Upvotes: 2

U880D
U880D

Reputation: 12132

From your current description I understand only that you probably like to define variables somehow dynamically.

The following example could give some guidance.

---
- hosts: test
  become: false
  gather_facts: false

  vars:

    ARG:
      - val1
      - val2

  tasks:

  - name: Dynamically define variable
    set_fact:
      FACTS_VAR: "{ 'SUB_{{ item }}': true }"
    loop: "{{ ARG }}"

  - debug:
      var: FACTS_VAR

resulting into an output of

TASK [Dynamically define variable] **
ok: [test.example.com] => (item=val1)
ok: [test.example.com] => (item=val2)

TASK [debug] ************************
ok: [test.example.com] =>
  FACTS_VAR:
    SUB_val2: true

Please take note that according your current description there can be only one value as result.

Further Q&A

Upvotes: 1

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