Ansible extract var from JSON - json

Question

I am using the URI module and I get a JSON response back. This is my playbook so far.
.. some playbook ..
register: output
- debug: msg="{{ output }}"
- name: get job id
set_fact:
job_id: "{{ output.json.results }}"
- debug: msg="{{ job_id }}"
Here’s the output of job_id from the debug above:
ok: [localhost] => {
"msg": [
{
"approval_state": "pending_approval",
"created_on": "2018-12-18T22:48:40Z",
"description": "Provision from [tpl] to [test]",
"href": "https://foo.ca/api/provision_requests/1000000000143",
"id": "1000000000143",
"message": "VM Provisioning - Request Created",
"options": {
"addr_mode": [
"dhcp",
"DHCP"
],
"auto_approve": false,
"cluster_filter": [
null,
null
],
"cores_per_socket": [
2,
"2"
],
I want to extract the “id” in the 5th line of the JSON output above. Any ideas?
I tried output.json.results.id but that errors out with no object id found

Answer 1

If you look at the JSON that has been produced, you actually have a list of dictionaries, albeit in this particular case, you have a list containing a single dictionary. So given the exact example:
- debug:
msg: "{{ job_id[0].id }}"
will extract the id field.
If you want to extract the id fields from every dictionary in the list (assuming multiple dictionaries are possible), you could instead do:
- debug:
msg: "{{ job_id | map(attribute='id') | list }}"
which will produce a simple list containing the contents of the id field in each dictionary.