Iterate over Variable in Jinja Template - templates

Question

I would like to iterate over a variable in ansible yaml and add key and value in jinja template
variable:
my:
variable:
- name: test
path: /etc/apt
cert: key.crt
my template
{% for key, value in item() %}
{{key}}: {{value}}
{% endfor %}
ansible yaml
- name: test
template:
force: yes
src: test.conf.j2
dest: /tmp/test.conf"
become: yes
with_items:
- "{{ my.variable }}"
How my yaml should look like:
path: /etc/apt
cert: key.crt

Answer 1

You actually have three issues in your task:
When using a loop, may it be loop or all the flavour of with_* you access the element currently looped in with the variable item, so not a function like you used in your task (item())
You are doing a superfluous list of list in
with_items:
- "{{ my.variable }}"
A first step would be to do with_items: "{{ my.variable }}".
An ever better step would be to use the loop replacement of the with_* syntax as suggested in the documentation
We added loop in Ansible 2.5. It is not yet a full replacement for with_<lookup>, but we recommend it for most use cases.
So you will end up with
loop: "{{ my.variable }}"
Then accessing properties of a dictionary in Jinja is done using the syntax
{% for key, value in dict.items() %}
Source: https://jinja.palletsprojects.com/en/2.11.x/templates/#for
So in your case:
{% for key, value in item.items() %}
All together, a working playbook demonstrating this would be:
- hosts: all
gather_facts: no
tasks:
- debug:
msg: |
{% for key, value in item.items() %}
{{key}}: {{value}}
{% endfor %}
loop: "{{ my.variable }}"
vars:
my:
variable:
- name: test
path: /etc/apt
cert: key.crt
That yields the result:
PLAY [all] *******************************************************************************************************
TASK [debug] *****************************************************************************************************
ok: [localhost] => (item={'name': 'test', 'path': '/etc/apt', 'cert': 'key.crt'}) => {
"msg": " name: test\n path: /etc/apt\n cert: key.crt\n"
}
PLAY RECAP *******************************************************************************************************
localhost : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
Now you just have to reuse this in your template and loop and you should have what you expect.