Solr do not split JSON - json

Question

I'm using Solr v8.0.0 and im trying to split a json at the indexing time using the method described at the solr official documentation about Transforming JSON, but it is not working as expected, and I'm getting flat jsons at the end.
Here is how I'm doing it:
First I create a single core named C2
bin/solr create_core -c c2
Then, it's solrconfig.xml is automatically created and left as default.
then I try to index some data using the example URL. the only difference is that I added a ?commit=true to the end of the URL so we can see whats happening
curl 'http://localhost:8983/solr/c2/update/json/docs'\
'?commit=true'\
'?split=/'\
'&f=first:/first'\
'&f=last:/last'\
'&f=grade:/grade'\
'&f=subject:/exams/subject'\
'&f=test:/exams/test'\
'&f=marks:/exams/marks'\
-H 'Content-type:application/json' -d '
{
"first": "John",
"last": "Doe",
"grade": 8,
"exams": [
{
"subject": "Maths",
"test" : "term1",
"marks" : 90},
{
"subject": "Biology",
"test" : "term1",
"marks" : 86}
]
}'
but at the end, I got this kind of indexing, and not the one that was shown in the example:
What I Got:
{
{
"first":["John"],
"last":["Doe"],
"grade":[8],
"subject":["Maths",
"Biology"],
"test":["term1",
"term1"],
"marks":[90,
86],
"id":"284878be-1339-43b5-8a1e-adb7a4be95fb",
"_version_":1664059760532520960}]
}
What I was supposed to get:
{
"first":"John",
"last":"Doe",
"marks":90,
"test":"term1",
"subject":"Maths",
"grade":8
}
{
"first":"John",
"last":"Doe",
"marks":86,
"test":"term1",
"subject":"Biology",
"grade":8
}
My fields where flatten as it would usually do in a normal indexation, without the ?split=/ command in the url. Can anyone help me figure out why this behavior is happening?
Thanks.

Answer 1

No, that's not the only difference. In your request you have:
'?split=/'\
In the example from the manual it is:
'?split=/exams'\
And since you're not splitting on /exams in your request, the result differs.