I ended up with the inline jinja for loop.
Also I used a pipe lookup instead of an s3 list task prior to this one.
So now everything is done in a one single task, without noise, and with the
same results.
Thanks everyone, it was really useful and I will keep it in mind for future
reference.
Dick
On Thu, 17 Aug 2023 at 20:30, Vladimir Botka <vbo...@gmail.com> wrote:
> On Thu, 17 Aug 2023 13:11:25 -0400
> Brian Coca <bc...@redhat.com> wrote:
>
> > see map/select/reject filters .. they are actually loops and normally
> > much simpler than using jinja command syntax ( {% %} ).
>
> Unfortunately, some filters are not *map* friendly. For example, the
> filter *product*
>
> list1|product(list2) .............. works fine
> list1|zip(list2)|map('product') ... does not work
>
>
> Details: Given the list
>
> l1:
> - dir: /tmp/test/d1
> sub_dir: [a, b]
> - dir: /tmp/test/d2
> sub_dir: [a, b, c]
>
> the goal is to create the list of products
>
> l2:
> - /tmp/test/d1/a
> - /tmp/test/d1/b
> - /tmp/test/d2/a
> - /tmp/test/d2/b
> - /tmp/test/d2/c
>
> The iteration (the filter *subelements* not used
> to demonstrate the functionality of *product*)
>
> - debug:
> msg: "{{ [item.0]|product(item.1) }}"
> loop: "{{ dirs|zip(sdirs) }}"
> vars:
> dirs: "{{ l1|map(attribute='dir') }}"
> sdirs: "{{ l1|map(attribute='sub_dir') }}"
>
> works as expected. Gives (abridged)
>
> msg:
> - - /tmp/test/d1
> - a
> - - /tmp/test/d1
> - b
>
> msg:
> - - /tmp/test/d2
> - a
> - - /tmp/test/d2
> - b
> - - /tmp/test/d2
> - c
>
> But, the filter *product* doesn't work with *map*
>
> dirs: "{{ l1|map(attribute='dir') }}"
> sdirs: "{{ l1|map(attribute='sub_dir') }}"
> l3: "{{ dirs|zip(sdirs)|map('product') }}"
>
> gives
>
> l3:
> - - - /tmp/test/d1
> - - - a
> - b
> - - - /tmp/test/d2
> - - - a
> - b
> - c
>
> This leaves you with Jinja if you want to avoid the loops in tasks
>
> l3: |
> {% filter from_yaml %}
> {% for i in l1 %}
> {% for s in i.sub_dir %}
> - {{ i.dir }}/{{ s }}
> {% endfor %}
> {% endfor %}
> {% endfilter %}
>
> --
> Vladimir Botka
>
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