List of dicts => dict of lists

[Dick Visser]

Hi

I'm struggling with something seemingly simple.
I have this list:

instances:
- id: i-0fe48c061f6a323a0
type: web
- id: i-0403e39813defda31
type: web
- id: i-0442f13b528e5e1c6
type: proxy
- id: i-0ebea75d008becaa6
type: proxy
- id: i-067c5d985c194e036
type: db
- id: i-0679e87f06d0cf9a2
type: db


Which I'd like to turn into this structure:


instances:
web:
- id: i-0fe48c061f6a323a0
- id: i-0403e39813defda31
proxy:
- id: i-0442f13b528e5e1c6
- id: i-0ebea75d008becaa6
db:
- id: i-067c5d985c194e036
- id: i-0679e87f06d0cf9a2


But I can't figure out how to do this...





--
Dick Visser
Trust & Identity Service Operations Manager
GÉANT

[Kai Stian Olstad]

Are you sure you need the id in the list as it's redundant and without
it is very simple with selectattr and map.

--
Kai Stian Olstad

[Vladimir Botka]

The task below does the job

- set_fact:
instances2: "{{ instances2|
default({})|
combine({item.0: item.1|
json_query('[].{id: id}')}) }}"
loop: "{{ instances|groupby('type') }}"

Cheers,

-vlado

[Srinivasa Jasti]

Here is another way.  Although I like vladimir Botka's solution.

---

- hosts: localhost

  gather_facts: no

  

  vars:

    instances:

      - id: 1234

        type: web

      - id: 1456

        type: web

      - id: 1678

        type: web

      - id: 3456

        type: proxy

      - id: 2567

        type: proxy

      - id: 2566

        type: db

      - id: 4900

        type: db

  tasks:

  - name: Set Fact for proxy

    set_fact:

      new_proxy: "{{ new_proxy|default([]) + [ { 'id': item.id } ] }}"

    loop: "{{ instances }}"

    when: item.type == 'proxy'

  - name: set Fact for db

    set_fact:

      new_db: "{{ new_proxy|default([]) + [ {'id': item.id } ] }}"

    loop: "{{ instances }}"

    when: item.type == 'db'

  - name: set Fact for web 

    set_fact:

      new_web: "{{ new_proxy|default([]) + [ {'id': item.id } ] }}"

    loop: "{{ instances }}"

    when: item.type == 'web'

  - name: Print facts

    debug:

      msg: "Web - {{ new_web }} - DB - {{ new_db }} - Proxy - {{ new_proxy }}"

    

  - name: Final set fact

    set_fact:

      new_instances: "{{ new_instances|default([]) + [ {'db': new_db}, {'web': new_web}, {'proxy': new_proxy} ] }}"

  - name: Print final fact

    debug:

      var: new_instances

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