JMESPath join output and strip unwanted chars - json

Question

I have the following json;
[
{
"compartment-id": "CompartmentID-123",
"defined-tags": {},
"display-name": "Test-123",
"freeform-tags": {},
"id": "ID-ABC",
"kms-key-id": "",
"lifecycle-state": "ACTIVE",
}
]
I am looking to join the id and display-name params into a comma seperate string with " and [] stripped, like so:
ID-ABC,Test-123
Closest I've managed to get so far is:
oci fs file-system list -c $compart --availability-domain $ad --query 'data[].[id,"display-name"][]' | tr -d '" '
[
ID-ABC,
Test-123
]
Wondering if there's a cleaner way of doing this all within JMESPath without piping output to tr, jq, sed or awk etc etc
UPDATE based on input from β.εηοιτ.βε
So close...
oci fs file-system list -c $compart --availability-domain $ad3 --query 'data[0].join(',', [id, "display-name"])'
Returns
ParseError: invalid token: Parse error at column 13, token "," (COMMA), for expression:
"data[0].join(,, [id, "display-name"])"
However playing around with quotes, best I can get is by using;
oci fs file-system list -c $compart --availability-domain $ad3 --query "data[0].join(',', [id, 'display-name'])"
Private key passphrase:
"ID-ABC,display-name"
I'm beginning to wonder if there's something wrong with my local settings or shell, whereby it's getting confused by the quotes marks?

Answer 1

Since you do have an array, you will first need to target the first element of the array, to get rid of it. Since an array is 0-based, this can easily be achieved via:
data[0]
which gives
{
"compartment-id": "CompartmentID-123",
"defined-tags": {},
"display-name": "Test-123",
"freeform-tags": {},
"id": "ID-ABC",
"kms-key-id": "",
"lifecycle-state": "ACTIVE"
}
Then, in order to create the string you are looking for, you can use the join function, that accepts, as parameter, a glue character and array.
You can get the array you look for pretty easily, using filters and multiselect lists:
data[0].[id, "display-name"]
which gives
[
"ID-ABC",
"Test-123"
]
Now we just need to apply the join function on top of all this:
data[0].join(',', [id, "display-name"])
which finally gives:
"ID-ABC,Test-123"
Additional notes on quoting in JMESPath:
'some-string'
is a raw literal string and won't be interpreted
`some-string`
is another form of raw literal string and won't be interpreted
"some-string"
is a literal expression and will be interpreted
So:
data[0].join(',', [id, "display-name"])
and
data[0].join(`,`, [id, "display-name"])
are two strictly equals queries.
While
data[0].join(',', [id, 'display-name'])
has a totally different meaning and would end you with the string display-name being the second element of your array, so it will result in
"ID-ABC,display-name"
All of this based on the JSON structure:
{
"data":[
{
"compartment-id":"CompartmentID-123",
"defined-tags":{},
"display-name":"Test-123",
"freeform-tags":{},
"id":"ID-ABC",
"kms-key-id":"",
"lifecycle-state":"ACTIVE"
}
]
}