Default filter issue

[Daniel Vašek]

Hello,

Im trying to use default filter:

hosts: ["{{ groups['examples'][0] | default('localhost') }}":5045]

But it return error:

FAILED! => {"changed": false, "msg": "AnsibleUndefinedVariable: 'dict object' has no attribute 'examples'"}.

I read something about default can use only 1 level deep, but I cannot write more levels properly.

[Stefan Hornburg (Racke)]

I suppose you have to accommodate the case where there is no examples entry in "groups" (untested):

{% if 'examples' in groups %}groups['examples'][0] | default('localhost'){% else %}localhost{% endif %}

Regards
Racke

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[Sebastian Meyer]

On 14.05.19 09:23, Daniel Vašek wrote:
> Hello,
>
> Im trying to use default filter:
>
> hosts: ["{{ groups['examples'][0] | default('localhost') }}":5045]
>

You should be able to use: groups.examples.0 | default(...)

This is the one case where dot notation is simpler/better :)

Sebastian

>
> But it return error:
>
>
> FAILED! => {"changed": false, "msg": "AnsibleUndefinedVariable: 'dict
> object' has no attribute 'examples'"}.
>
>
> I read something about default can use only 1 level deep, but I cannot
> write more levels properly.
>
>
>

--
Sebastian Meyer
Linux Consultant & Trainer
Mail: me...@b1-systems.de

B1 Systems GmbH
Osterfeldstraße 7 / 85088 Vohburg / http://www.b1-systems.de
GF: Ralph Dehner / Unternehmenssitz: Vohburg / AG: Ingolstadt,HRB 3537

[Daniel Vašek]

This could work, but only if there is no such group. When the group exists, but its empty, it throws error.

Dne úterý 14. května 2019 9:50:36 UTC+2 Stefan Hornburg (Racke) napsal(a):

On 5/14/19 9:23 AM, Daniel Vašek wrote:
> Hello,
>
> Im trying to use default filter:
>
> hosts: ["{{ groups['examples'][0] | default('localhost') }}":5045]
>
>
> But it return error:
>
>
> FAILED! => {"changed": false, "msg": "AnsibleUndefinedVariable: 'dict object' has no attribute 'examples'"}.
>
>
> I read something about default can use only 1 level deep, but I cannot write more levels properly.

I suppose you have to accommodate the case where there is no examples entry in "groups" (untested):

{% if 'examples' in groups %}groups['examples'][0] | default('localhost'){% else %}localhost{% endif %}

Regards
        Racke

>
>
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