How to get entry of a dictionary from vmware_guest_disk_facts - json

Question

I'm trying to get the datastore name for a specific hard disk but I haven't been successful in being able to figuring out choose an entry in the list.
This output is from the ansible module "vmware_guest_disk_facts"
I save this output to a variable called "vm_info".
"guest_disk_facts": {
"0": {
"backing_filename": "stuffstuff",
"capacity_in_kb": 106954752,
"backing_eagerlyscrub": false,
"backing_datastore": "WHAT I REALLY WANT",
"backing_writethrough": false,
"label": "Hard disk 1",
"backing_type": "FlatVer2",
"key": 2000,
"capacity_in_bytes": 109521666048,
"backing_thinprovisioned": false,
"controller_key": 1000,
"summary": "106,954,752 KB",
"unit_number": 0,
"backing_uuid": "info"
},
"1": {
"backing_filename": "stuffstuff",
"capacity_in_kb": 15728640,
"backing_eagerlyscrub": false,
"backing_datastore": "DON'T CARE OF ABOUT THIS ONE",
"backing_writethrough": false,
"label": "Hard disk 2",
"backing_type": "FlatVer2",
"key": 2001,
"capacity_in_bytes": 16106127360,
"backing_thinprovisioned": false,
"controller_key": 1000,
"summary": "15,728,640 KB",
"unit_number": 1,
"backing_uuid": "info"
}
- debug:
msg: "{{ item.guest_disk_facts | json_query(query) }}"
with_items: "{{ vm_info.results }}"
vars:
query: "guest_disk_facts.0.backing_datastore" #done w/ & w/o quotes around 0
I've also tried the following queries and I feel like I've exhausted all options at this point.
query: "guest_disk_facts.[0].backing_datastore"#done w/ & w/o quotes around 0
query: "guest_disk_facts[0].backing_datastore" #done w/ & w/o quotes around 0
query: "guest_disk_facts.*.backing_datastore" #will give me backing_datastore entries for both dictionaries in this case
I would like to just get backing_datastore for one entry in this list of dictionaries
msg: "WHAT I REALLY WANT"
but so far I'm returned with either this error:
Expecting: ['quoted_identifier', 'unquoted_identifier', 'lbracket', 'lbrace'], got: number: Parse error at column 17, token \"0\" (NUMBER), for expression
OR
msg: ""
OR
msg:[
"0",
]

Answer 1

The task below gives "WHAT YOU REALLY WANT"
- debug:
msg: "{{ guest_disk_facts['0'|quote].backing_datastore }}"
The point is quoting the quoted key. The keys '0' and '1' are not valid variables and must be quoted.
The loop below
- debug:
msg: "{{ guest_disk_facts[item|quote].backing_datastore }}"
loop: "{{ guest_disk_facts.keys() }}"
gives
ok: [localhost] => (item=1) =>
msg: DON'T CARE OF ABOUT THIS ONE
ok: [localhost] => (item=0) =>
msg: WHAT I REALLY WANT

Answer 2

Another way to do this -
- name: Get all disks from existing VM
vmware_guest_disk_info:
validate_certs: False
hostname: '{{ vcenter_hostname }}'
username: '{{ vcenter_username }}'
password: '{{ vcenter_password }}'
datacenter: Asia-Datacenter1
name: VM_8046
register: existing_disk
- name: Get Backing datastore for desired disk id
set_fact:
disk_zero_datastore: "{{ item.value.backing_datastore }}"
with_dict: "{{ existing_disk.guest_disk_info }}"
when: item.key == '0'
- debug:
msg: "{{ disk_zero_datastore }}"
when: disk_zero_datastore is defined