separate json keys into different file ansible - json

Question

I have a variable of a large JSON data of students' data of different classes containing their names and numbers respectively. The variable is "data" and here is what the variable contains:
{
"Class001": [
{
"Jesse": 001
},
{
"Adam": 002
}
],
"Class002": [
{
"Jill": 111
},
{
"Ray": 112
}
],
.....
}
Using ansible, I want to separate the keys "Class00X" into some different files. For example, the Class001 file contain:
{
"Jesse": 001
},
{
"Adam": 002
},
.....
etc. How can i do this? thanks

Answer 1

i have created a file.json with:
{
"Class001": [
{
"Jesse": "001"
},
{
"Adam": "002"
}
],
"Class002": [
{
"Jill": "111"
},
{
"Ray": "112"
}
]
}
this playbook does the job:
- hosts: localhost
gather_facts: no
vars:
json: "{{ lookup('file', 'file.json') | from_json }}"
tasks:
- name: loop
copy:
dest: "files/{{ item.key }}.txt"
content: "{{ item.value | to_nice_json }}"
loop: "{{ json | dict2items }}"
here files files/class001.txt and files/class002.txt are created

Answer 2

A dictionary is a better structure to store students' names and numbers. Optionally, store the dictionaries instead of lists
- copy:
dest: "files/{{ item.key }}.yml"
content: "{{ item.value|combine|to_nice_yaml }}"
loop: "{{ json|dict2items }}"
gives
shell> cat files/Class001.yml
Adam: '002'
Jesse: '001'
shell> cat files/Class002.yml
Jill: '111'
Ray: '112