How to handling "empty" string and replace them in jq

[vavava]

Hi ALL,

I got a setback while I want to got a string form "where-used" output.
The where-used output form show as below

and I guess it the method to judgment whether "unused-object" or not.
The value of "Total"
=0 >> the target object is "unused object", all array is empty.
≠0 >> the target object is not "unused object", there is some objects information in array.
then if I interesting others string , just like "type" in object or "rule name" in access-control rules: rule,
I try the command below

Is it possible to return a word just like "null" if the array is empty ?

and how to do that in one command line.

Regards and thanks, vavava

[_Val_]

What happens if you try using the same search in SmartConsole and not through API?

[PhoneBoy]

As near as I can tell, this isn’t possible and you have to do something like: https://stackoverflow.com/questions/53135035/jq-returning-null-as-string-if-the-json-is-empty