Complex with_subelements construct - ansible

Question

I have the list:
final_list:
- result:
name: "val1"
status: true
- result:
name: "val2"
status: true
- skipped:
path: "path1"
- result:
results:
- result:
name: "val4"
status: true
- result:
name: "val5"
status: true
- skipped:
path: "path2"
I would like check if any status in my list is false.
I started with:
- set_fact:
any_false: true
when: (item.0.result is defined and item.0.result.status == false) or (item.1.result is defined and item.1.result.status == false)
with_subelements:
- "{{ final_list }}"
- result.results"
- skip_missing: True
but this task ommit elements from finally_list without results in result.
I would expect iterate by all elements which contain status variable.
I tried also:
with_subelements:
- "{{ final_list }}"
- result.results | default([])
but get error:
msg: msg: the key result should point to a dictionary, got 'None'

Answer 1

I suggest to do this a bit differently: get all individual result elements in a single flattened list, extract the status and check that all elements are true (or not).
The following playbook should be self explanatory (run with -v to see intermediate debug)
---
- hosts: localhost
gather_facts: false
vars:
final_list:
- result:
name: "val1"
status: true
- result:
results:
- result:
name: "valA"
status: false
- result:
name: "valB"
status: true
- skipped:
path: "path2"
- result:
name: "val2"
status: true
- skipped:
path: "path1"
- result:
results:
- result:
name: "val4"
status: true
- result:
name: "val5"
status: true
- skipped:
path: "path2"
# List of all top level elements without nested elements
single_results: "{{ final_list | rejectattr('result.results', 'defined') }}"
# Flattened list of all nested result elements.
# Will work with several nested elements (as you can see from my example data)
nested_results: "{{ final_list | selectattr('result.results', 'defined') | map(attribute='result.results') | flatten }}"
# Single list containing top level + nested result elements
all_results: "{{ single_results + nested_results }}"
# List of all existing status values in the list of result elements
all_status: "{{ all_results | selectattr('result.status', 'defined') | map(attribute='result.status') }}"
tasks:
- name: Show entire list
debug:
var: all_results
verbosity: 1
- name: Show list of status
debug:
var: all_status
verbosity: 1
- name: Make sure all exsiting status are true
assert:
that:
- all_status is all
fail_msg: "At least one status is false"
success_msg: "All status are true"
which gives:
PLAY [localhost] ***********************************************************************************************************************************************************************************************************************
TASK [Show entire list] ****************************************************************************************************************************************************************************************************************
skipping: [localhost]
TASK [Show list of status] *************************************************************************************************************************************************************************************************************
skipping: [localhost]
TASK [Make sure all exsiting status are true] ******************************************************************************************************************************************************************************************
fatal: [localhost]: FAILED! => {
"assertion": "all_status is all",
"changed": false,
"evaluated_to": false,
"msg": "At least one status is false"
}
PLAY RECAP *****************************************************************************************************************************************************************************************************************************
localhost : ok=0 changed=0 unreachable=0 failed=1 skipped=2 rescued=0 ignored=0
And if you modify the data to all true (only pasting the last task...)
TASK [Make sure all exsiting status are true] ******************************************************************************************************************************************************************************************
ok: [localhost] => {
"changed": false,
"msg": "All status are true"
}

Answer 2

Q: "Check if any status is false."
A: Simple brute force
- set_fact:
status: "{{ status|d([]) + [item.split(':')|last|trim|bool] }}"
loop: "{{ (final_list|to_nice_yaml).splitlines() }}"
when: item is match('^.*\\s+status:\\s+.*$')
gives the list of the statuses
status:
- true
- true
- true
- true
See Testing if a list value is True, e.g.
- debug:
msg: No status is False.
when: status is all