counting the array of elements in ansible.

[mahesh g o]

- hosts: localhost

  gather_facts: false

  vars:

    foo: ['vs1','vs2','vs3','vs4']

  tasks:

    - name: counting the array elements

        yes: "{{foo|length}}"

seeing the below error: not sure what am i missing here:

ERROR! Syntax Error while loading YAML.

  mapping values are not allowed in this context

The error appears to be in '/root/ansible/playbooks/syst/lab.yml': line 7, column 12, but may

be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:

    - name: counting the array elements

        yes: "{{foo}}"|length

           ^ here

We could be wrong, but this one looks like it might be an issue with

missing quotes. Always quote template expression brackets when they

start a value. For instance:

    with_items:

      - {{ foo }}

Should be written as:

    with_items:

      - "{{ foo }}"

[Stefan Hornburg (Racke)]

On 3/19/20 4:23 PM, mahesh g o wrote:
> - hosts: localhost
>   gather_facts: false
>   vars:
>     foo: ['vs1','vs2','vs3','vs4']
>   tasks:
>     - name: counting the array elements
>         yes: "{{foo|length}}"

There is no module called "yes", try "set_fact" or "debug" and make sure your indentation is correct.

Regards
Racke

>
> seeing the below error: not sure what am i missing here:
>
> ERROR! Syntax Error while loading YAML.
>   mapping values are not allowed in this context
>
> The error appears to be in '/root/ansible/playbooks/syst/lab.yml': line 7, column 12, but may
> be elsewhere in the file depending on the exact syntax problem.
>
> The offending line appears to be:
>
>     - name: counting the array elements
>         yes: "{{foo}}"|length
>            ^ here
> We could be wrong, but this one looks like it might be an issue with
> missing quotes. Always quote template expression brackets when they
> start a value. For instance:
>
>     with_items:
>       - {{ foo }}
>
> Should be written as:
>
>     with_items:
>       - "{{ foo }}"
>
>

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--
Ecommerce and Linux consulting + Perl and web application programming.
Debian and Sympa administration. Provisioning with Ansible.

[mahesh g o]

Thanks  it worked.

vars:

    foo: ['vs1','vs2','vs3','vs4']

  tasks:

    - name: counting the array elements

      debug:

         msg: "{{foo|length}}"