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
--
You received this message because you are subscribed to the Google Groups
"Ansible Project" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to ansible-project+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/ansible-project/20230817202944.3f3512c8%40gmail.com.
pgpzQmp4GVXoP.pgp
Description: OpenPGP digital signature
