Splitting Json to multiple jsons in NIFI - json

Question

I have the below json file which I want to split in NIFI
Input:
[ {
"id" : 123,
"ticket_id" : 345,
"events" : [ {
"id" : 3322,
"type" : "xyz"
}, {
"id" : 6675,
"type" : "abc",
"value" : "sample value",
"field_name" : "subject"
}, {
"id" : 9988,
"type" : "abc",
"value" : [ "text_file", "json_file" ],
"field_name" : "tags"
}]
}]
and my output should be 3 different jsons like below:
{
"id" : 123,
"ticket_id" : 345,
"events.id" :3322,
"events.type":xyz
}
{
"id" : 123,
"ticket_id" : 345,
"events.id" :6675,
"events.type":"abc",
"events.value": "sample value"
"events.field_name":"subject"
}
{
"id" : 123,
"ticket_id" : 345,
"events.id" :9988,
"events.type":"abc",
"events.value": "[ "text_file", "json_file" ]"
"events.field_name":"tags"
}
I want to know can we do it using splitjson? I mean can splitjson split the json based on the array of json objects present inside the json?
Please let me know if there is a way to achieve this.

Answer 1

If you want 3 different flow files, each containing one JSON object from the array, you should be able to do it with SplitJson using a JSONPath of $ and/or $.*

Answer 2

Using reduce function:
function split(json) {
return json.reduce((acc, item) => {
const events = item.events.map((evt) => {
const obj = {id: item.id, ticket_id: item.ticket_id};
for (const k in evt) {
obj[`events.${k}`] = evt[k];
}
return obj;
});
return [...acc, ...events];
}, []);
}
const input = [{"id":123,"ticket_id":345,"events":[{"id":3322,"type":"xyz"},{"id":6675,"type":"abc","value":"sample value","field_name":"subject"},{"id":9988,"type":"abc","value":["text_file","json_file"],"field_name":"tags"}]}];
const res = split(input);
console.log(res);