How to list a subelement from hostvars for all ansible_play_hosts in a single line

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1

The use case is to run a specific task once over all hosts only when at least one host failed the previous task.

It could be something like:

  • name: How to list a subelement from hostvars for all ansible_play_hosts
    gather_facts: True
    hosts: all
    strategy: debug
    tasks:

  • name: Run first task
    include_tasks: “task.yml”
    register: return_task
    ignore_errors: yes

  • name: Run second task when first task has failed on at least one playing host
    debug:
    msg: “first task has failed on at least one of: {{ ansible_play_hosts }}”
    when: ansible_play_hosts | map(‘extract’, hostvars, ‘return_task.failed’) | list is any

The conditional makes the last task fail with:

‘ansible.vars.hostvars.HostVarsVars object’ has no attribute ‘return_task.failed’

Any suggestion to correct the conditional?

2

The solution seems to be easy actually:
when: ansible_play_hosts | map(‘extract’, hostvars, ‘return_task’) | list | selectattr(‘failed’) | list is any