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

[jean-christophe manciot]

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?

[jean-christophe manciot]

The solution seems to be easy actually:

when: ansible_play_hosts | map('extract', hostvars, 'return_task') | list | selectattr('failed') | list is any