You can specify default values for both the dictionary in which you are
trying to look something up, and the key you are looking up:
with_dict: *(file_system_system_vg|default({})).lv|default({})*
The parentheses are important!
On Wednesday, August 12, 2015 at 5:54:12 PM UTC+2, Patrick McMahon wrote:
>
> I made a simple playbook to show the issue. It seems ansible evalutes all
> variables regardless of the conditional result before ternary.
> If you run the playbook twice, once with "simpleDict" defined, and again
> with it commented out.
>
> ---
> #TESTING: ternary behaviour
> - name: Run - Testing ternary
> sudo: yes
> hosts: "{{hosts}}"
> gather_facts: no
>
> vars:
> simpleDict:
> # name: 'A simple dictionary'
> # nestedDict: {}
>
> tasks:
> - set_fact: foo="{{ simpleDict is defined |
> ternary(simpleDict.nestedDict|default({}),"simpleDict not defined") }}"
>
> - debug: var=foo
>
> Thanks
> Patrick
>
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