error with appending list in Ansible

[maulik patel]

I'm trying to append new tunnel interface to empty list, but i'm got below error. Can you please help me out here ?

tasks:         

        - name: empty list
           set_fact:
                   list_tunnel: []

         - name: create new list for tunnel
           set_fact:
                 list_tunnel_new: "{{ list_tunnel + ['tunnel.{{item}}'] }}"
           loop: "{{ range(1,10)|list}}"
           

error: 

fatal: [SJL]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'item' is undefined\n\nThe error appears to be in '/etc/ansible/aws/interface_palo_facts.yaml': line 34, column 12, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n - name: print facts\n ^ here\n"}

thank you..!!

[Abhijeet Kasurde]

You can do this --

```

      - set_fact:
          list_tunnel: "{{ result }}"
        vars:
          prefix: tunnel
          a_list: "{{ range(1, 10) | list }}"
          result: "{{ [prefix] | product(a_list) | map('join', '.') | list }}"

      - debug:
          msg: "{{ list_tunnel }}"

```

or

```

      - name: create new list for tunnel
        set_fact:

          list_tunnel: "{{ list_tunnel | default([]) + ['tunnel.' + item | string] }}"
        loop: "{{ range(1,10) | list}}"

      - debug:
          msg: "{{ list_tunnel }}"

```

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--

Thanks,

Abhijeet Kasurde

[maulik patel]

hi @abhijeet,

thanks for sharing a solution... first solution works like a champ...2nd is only giving last element..

[Abhijeet Kasurde]

I get correct output with 2nd solution as well

TASK [debug] **********************************************************************************
ok: [localhost] => {
    "msg": [
        "tunnel.1",
        "tunnel.2",
        "tunnel.3",
        "tunnel.4",
        "tunnel.5",
        "tunnel.6",
        "tunnel.7",
        "tunnel.8",
        "tunnel.9"
    ]
}

To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/7de320a0-d7fe-4b9e-95c5-506d70b0342cn%40googlegroups.com.

--

Thanks,

Abhijeet Kasurde