Using set_fact along with do until group

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1

Hi I have a usecase where i have a string “dumb”. During the execution of play i create a new string by using a random filter and this string should be any of [‘duma’,‘dumc’,‘dumd’] but not “dumb”. So i tried to use do until loop as follows:

  • hosts: local
    connection: local
    gather_facts: false
    vars:
    old_string: ‘dumb’

tasks:

  • name: Generate random number
    set_fact: “new_string=dum{{ [‘a’,‘b’,‘c’,‘d’] |random }}”
    register: e
    until: e != old_string

  • name: Fail if old number and new number are same
    action: fail
    when: new_string == old_string

So as far as i am concerned the check at the until step should avoid allowing the new_string to be “dumb”, but its not doing as expected. Any suggestions ?

2

try:
set_fact: "new_string=dum{{
(['a','b','c','d']|difference([old_string[-1]])) |random }}"

it should not need loop as you remove the old string ending from the
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