Jinja Template - list

Question

Below are my input.yaml and my template.jinja:

input.yaml:

animals:
  my_pets:
  - species:
      name: "cat"
      age: "28"
  - species:
      name: "dog"
      age: "10"

template.jinja

{%- for pet in animals.my_pets %}
Type: {{ pet.species.name }}
Name: {{ pet.species.age }}
{%- endfor %}

The result should be like the input.yaml

animals:
  my_pets:
  - species:
      name: "cat"
      age: "28"
  - species:
      name: "dog"
      age: "10"

For sure something is not right on my template as it doesn't render the expected structure but I don't find what.

---

I've made some modification and somehow it work, but not as intended.

new_input.yaml:

my_pets:
- species:
  - name: "cat"
  - age: "28"
- species:
  - name: "dog"
  - age: "10"

new_template.jinja:

my_pets:
{%- for intf in my_pets %}
  {%- for i in intf.species %}
    {%- for key,value in i.items() %}
  - species:
     - {{ key }}: "{{ value }}"
    {%- endfor %}
  {%- endfor %}
{%- endfor %}

The new_output is like this:

  my_pets:
  - species:
     - name: "cat"
  - species:
     - age: "28"
  - species:
     - name: "dog"
  - species:
     - age: "10"

But it should be like this:

animals:
  my_pets:
  - species:
      name: "cat"
      age: "28"
  - species:
      name: "dog"
      age: "10"

Answer 1

In a loop like:

{%- for key,value in dict.items() %}
{%- endfor %}

What you are doing is to loop on the different attributes of a dictionary — in your case name and age, so:

1. you should not start your line with a - or you will create a list:

   {%- for key,value in dict.items() %}
     {{ key }}: "{{ value }}"
   {%- endfor %}
   

2. the loop will iterate on each attribute of the dictionary, so, your parent attribute, species, should be on top of the loop, not inside it:

   - species:
   {%- for key,value in dict.items() %}
       {{ key }}: "{{ value }}"
   {%- endfor %}
   

---

Given your input, this loop will recreate the same list of dictionaries as inputted:

my_pets:
{%- for pet in animals.my_pets %}
  - species:
  {%- for key, value in pet.species.items() %}
      {{ key }}: "{{ value }}"
  {%- endfor %}
{%- endfor %}