Multiple when statements in loop?

[John Harmon]

For reference, this is a continuation of: https://groups.google.com/forum/#!topic/ansible-project/XhU9iPXjjcw

Can you use multiple when statements in a loop? or is there a different way to approach this without having to write out a task for each item?  Take the following for example.  I know the syntax is wrong, but it gives you a better idea of what I mean.

    - name: Insert audit rules
      lineinfile:
        path: "/etc/audit/audit.rules"
        line: "{{ item.line }}"
        regexp: "{{ item.regexp }}"
        state: present
        insertafter: EOF
      notify: Restart auditd
      with_items:
        - { line: '-w /home/GOMER/Scripts -p w -k copperfield', regexp: '.*GOMER.*Scripts.*' }
          when: directories.results.0.stat.exists
        - { line: '-w /home/PYLE/Scripts -p w -k copperfield', regexp: '.*PYLE*Scripts.*' }  
          when: directories.results.1.stat.exists

[Matt Martz]

I think instead of doing that, you should use `with_together` and a single `when` statement that meets your needs

...

    line: "{{ item.1.line }}"

    regexp: "{{ item1.regexp }}"

...

  when: item.0.stat.exists

  with_together:

    - "{{ directories.results }}"

    -

      - { line: '-w /home/GOMER/Scripts -p w -k copperfield', regexp: '.*GOMER.*Scripts.*' }

      - { line: '-w /home/PYLE/Scripts -p w -k copperfield', regexp: '.*PYLE*Scripts.*' }

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Matt Martz
@sivel
sivel.net

[John Harmon]

Thanks.  with_together is new to me.  I am having a hard time wrapping my mind around the example you gave.  Can you explain it to me?

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[John Harmon]

I created the following playbook, and this works as expected, but I don't understand it in context to what you recommended:

---
- hosts: localhost

  vars:
    x: ['a','b','c']
    y: ['1','2','3']
    z: ['first','second','third']

  tasks:
    - name: Testing
      debug: msg="x is {{ item.0 }}, y is {{ item.1 }} and z is {{ item.2 }}"
      with_together:
        - "{{ x }}"
        - "{{ y }}"
        - "{{ z }}"

Results:

PLAY [localhost] *************************************************************************************************************************************************************************************************************************

TASK [Gathering Facts] *******************************************************************************************************************************************************************************************************************
ok: [localhost]

TASK [Testing] ***************************************************************************************************************************************************************************************************************************
ok: [localhost] => (item=[u'a', u'1', u'first']) => {
    "changed": false,
    "item": [
        "a",
        "1",
        "first"
    ],
    "msg": "x is a, y is 1 and z is first"
}
ok: [localhost] => (item=[u'b', u'2', u'second']) => {
    "changed": false,
    "item": [
        "b",
        "2",
        "second"
    ],
    "msg": "x is b, y is 2 and z is second"
}
ok: [localhost] => (item=[u'c', u'3', u'third']) => {
    "changed": false,
    "item": [
        "c",
        "3",
        "third"
    ],
    "msg": "x is c, y is 3 and z is third"
}

[Matt Martz]

It allows you to loop 2 parallel sets of data.

See http://docs.ansible.com/ansible/latest/playbooks_loops.html#looping-over-parallel-sets-of-data 

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[John Harmon]

Right, I saw that....  I don't understand why in the example you gave you are referencing item.1.* and then using a when statement of item.0

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