JQ: Merge all entries in an array without hardcoding the key - json

Question

I have a json like this
[
{
"name": "hosts",
"ipaddress": "1.2.3.4",
"status": "UP",
"randomkey": "randomvalue"
},
{
"name": "hosts",
"ipaddress": "5.6.7.8",
"status": "DOWN",
"newkey": "newvalue"
},
{
"name": "hosts",
"ipaddress": "9.10.11.12",
"status": "RESTART",
"anotherkey": "anothervalue"
}
]
I want to merge the objects and looking for some output like this
[
{
"name": "hosts", //doesn't matter if it is ["hosts"]
"ipaddress": ["1.2.3.4", "5.6.7.8", "9.10.11.12"],
"status": ["UP", "DOWN", "RESTART"],
"randomkey": ["randomvalue"],
"newkey": ["newvalue"],
"anotherkey": ["anothervalue"]
}
]
I can hardcode each and every key and do something like this - { ipaddress: (map(.ipaddress) | unique ) } + { status: (map(.status) | unique ) } + { randomkey: (map(.randomkey) | unique ) }
The important ask here is the values are random and cannot be hardcoded.
Is there a way i can merge all the keys without hardcoding the key here?

Answer 1

Using reduce, then unique would be one way:
jq '[
reduce (.[] | to_entries[]) as {$key, $value} ({}; .[$key] += [$value])
| map_values(unique)
]'
[
{
"name": [
"hosts"
],
"ipaddress": [
"1.2.3.4",
"5.6.7.8",
"9.10.11.12"
],
"status": [
"DOWN",
"RESTART",
"UP"
],
"randomkey": [
"randomvalue"
],
"newkey": [
"newvalue"
],
"anotherkey": [
"anothervalue"
]
}
]
Demo
Using group_by and map, then unique again would be another:
jq '[
map(to_entries[]) | group_by(.key)
| map({key: first.key, value: map(.value) | unique})
| from_entries
]'
[
{
"anotherkey": [
"anothervalue"
],
"ipaddress": [
"1.2.3.4",
"5.6.7.8",
"9.10.11.12"
],
"name": [
"hosts"
],
"newkey": [
"newvalue"
],
"randomkey": [
"randomvalue"
],
"status": [
"DOWN",
"RESTART",
"UP"
]
}
]
Demo