JOLT transformation remove a specific field - json

Question

Edit1: My goal is to be able to remove a specific attribute that has a specific value. In my example, the rating attribute should be removed as soon as it has a "?" as content.
"rating": "?" => should be deleted
"rating": "1" => should NOT be deleted
Hi all, is there any way that I don't remove all attributes of a certain type, but only those that have a certain content? Example:
"test1": "123",
"test1":"?"
Here I would like to remove only test1:"?".
Input:
{
"TEST": {
"revision": "2021",
"results": [
{
"parameter": "Abweichung X L/R",
"example": "123",
"rating": "1"
},
{
"parameter": "10001",
"example": "BIN7934659050003696",
"rating": "?"
},
{
"parameter": "1015 Bauteil niO",
"rating": "0"
}
]
}
}
Desired Output:
{
"TEST": {
"revision": "2021",
"results": [
{
"parameter": "Test",
"example": "123456",
"rating": "1"
},
{
"parameter": "10001",
"example": "123"
},
{
"parameter": "Test123",
"rating": "0"
}
]
}
}
All "ratings" except the one with the content "?" remain.
Thanks in advance and many greetings

Answer 1

You can use below shift transformation spec in order to remove the attribute rating with value ?
[
{
"operation": "shift",
"spec": {
"TEST": {
"*": "&1.&",
"results": {
"*": {
"rating": {
"?": {
"#(2,parameter)": "&5.&4.[&3].parameter",
"#(2,example)": "&5.&4.[&3].example"
},
"*": {
"#2": "&5.&4.[&3]"
}
}
}
}
}
}
}
]
where
"*" represents the rest of the keys(revision in this case) other than specified(results)
the &1 at the top and &5s represent the outermost key(TEST)
the &4s represent the array's(results) name
the [&3] s are needed to combine the independent sub-elements due to the indexes of the array(results) as a common center