Delete objects and arrays with jq which match a key - arrays

Question

I have a JSON with the following content:
{
"data": [
{
"name": "Test",
"program": {
"publicAccess": "--------",
"externalAccess": false,
"userGroupAccesses": [
{
"access": "r-------"
},
{
"access": "rw------"
}
],
"id": "MmBqeMLIC2r"
},
"publicAccess": "rw------"
}
]
}
And I want to delete all keys (recursively) which match publicAccess or userGroupAccesses, so that my JSON looks like this:
{
"data": [
{
"name": "Test",
"program": {
"externalAccess": false,
"id": "MmBqeMLIC2r"
}
}
]
}
I've copied jq's builtin walk function from source.
# Apply f to composite entities recursively, and to atoms
def walk(f):
. as $in
| if type == "object" then
reduce keys[] as $key
( {}; . + { ($key): ($in[$key] | walk(f)) } ) | f
elif type == "array" then map( walk(f) ) | f
else f
end;
# My Code
walk(if (type == "object" and .publicAccess)
then del(.publicAccess)
elif (type == "array" and .userGroupAccesses)
then del(.userGroupAccesses)
else
.
end )
Gives me jq: error (at <stdin>:2622): Cannot index array with string "userGroupAccesses". Also if I use .userGroupAccesses[] - How do I get the result?
Snippet on jqplay: https://jqplay.org/s/1m7wAeHMTu

Answer 1

Your problem is when type == "array" is true . will be an array so .userGroupAccesses won't work. What you want to do is focus on the case when . is an object. In your call to walk you only need to check for type == "object" and then remove the members you don't want. e.g.
walk(if type == "object" then del(.publicAccess, .userGroupAccesses) else . end)
Try it online at jqplay.org
You can also solve this without walk by using Recursive Descent .. e.g.
del(.. | .publicAccess?, .userGroupAccesses?)
Try it online at jqplay.org