String to vars not working anymore in Ansible v1.8.x

[Khuong Dinh Pham]

Hi

In v1.7.2 It was possible to do this i a template:

{{ vars['prefix_' + {{ item.env }} + '_postfix' ] | get_something }}

But it's not working anymore in v.1.8.x. It just say that variable 'prefix_main_postfix' does not exist in dict

Can i somehow concat a string and use it as variable name in Ansible v.1.8.x?

[Serge van Ginderachter]

On 22 February 2015 at 14:35, Khuong Dinh Pham <khuo...@gmail.com> wrote:

​​

{{ vars['prefix_' + {{ item.env }} + '_postfix' ] | get_something }}

​I'm not sure this would have worked in older versions.​ Either way, don't nest those braces, just use plain variables:

[Khuong Dinh Pham]

Hi

Typo error. I meant

​{{ vars['prefix_' + item.env + '_postfix' ] | get_something }}

This is not working anymore in v1.8.4 If I switch back to v.1.7.2 it's working fine.

However if I type

​{{ prefix_main_postfix | get_something }} in v.1.8.4 it's working fine

[Serge van Ginderachter]

On 22 February 2015 at 19:30, Khuong Dinh Pham <khuo...@gmail.com> wrote:

​{{ vars['prefix_' + item.env + '_postfix' ] | get_something }}

This is not working anymore in v1.8.4 If I switch back to v.1.7.2 it's working fine.

However if I type

​{{ prefix_main_postfix | get_something }} in v.1.8.4 it's working fine

​Your latter example strike me as being obvious.​

Is the vars[]dict meant to be something special?

[Khuong Dinh Pham]

Maybe it obvious but it is just to tell you that the variable exist. We use the vars[] like this:

myvars.yml:

prefix_main_postfix: some_value

master yml:

---

- hosts: "{{ hosts }}"

  vars:

    os: "linux"

  vars_files:

    - ~/myvars.yml

task:

- template: src=mytemplate.j2 ...

    with_items:

      - { env: 'main' }

      - { env: 'staging' }

mytemplate.j2:

​{{ vars['prefix_' + item.env + '_postfix' ] | get_something }}

error:

fatal: [127.0.0.1 -> 127.0.0.1] => {'msg': "AnsibleUndefinedVariable: One or more undefined variables: 'dict object' has no attribute 'prefix_main_postfix'", 'failed': True}

[Jonathan Davila]

Try taking out the middle curly braces. So like:

{{ 'prefix_' + item.env + '_postfix' | get_something }}

If you are declaring vars with the vars construct, you don't need to reference vars as a dict, the key/values are directly available.

Let me know if that helps.

[Khuong Dinh Pham]

Hi

It does not work because get_something can't parse the string "prefix_main_postfix" I need the value.

If I remove "| get_something" like this:

{{ 'prefix_' + item.env + '_postfix' }}

it just print the text 'prefix_main_postfix'