List of dicts => dict of lists

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1

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...

2

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

3

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

4

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