How to transform a json to flat using JOLT? - apache-nifi

Question

I just need to make the attributes element to be on the same level with the id.
I am just having an issue to copy the attributes to be on the same level.
This is my sample JSON
{
"data" : [ {
"type" : "types",
"id" : "CYY7",
"attributes" : {
"description" : null,
"color" : "#dfc12d",
"duration" : 15,
"created_at" : "2017-01-10T04:51:22Z",
"updated_at" : "2017-01-10T04:51:22Z",
"slug" : "15min",
"active" : false,
"location" : null
}
}, {
"type" : "types",
"id" : "BGER",
"attributes" : {
"description" : null,
"color" : "#8989fc",
"duration" : 30,
"created_at" : "2017-01-10T04:51:22Z",
"updated_at" : "2017-01-10T04:51:22Z",
"slug" : "30min",
"active" : true,
"location" : null
}
}
This is my sample transformation.
[{
"operation": "shift",
"spec": {
"data": {
"*": {
"id": "event_type[&1].id",
"type": "event_type[&1].type",
"attributes": "event_type[&1].attributes[&1].description"
}
}
}
}]
The desired output would be
{
"event_type" : [ {
"type" : "types",
"id" : "CYY7",
"description" : null,
"color" : "#dfc12d",
"duration" : 15,
}, {
"type" : "types",
"id" : "BGER",
"description" : null,
"color" : "#8989fc",
"duration" : 30,
}]
}

Answer 1

Try with this Jolt Spec:
[{
"operation": "shift",
"spec": {
"data": {
"*": {
"id": "event_type[&1].id",
"type": "event_type[&1].type",
"attributes": {
"description": "event_type[&2].description",
"color": "event_type[&2].color",
"duration": "event_type[&2].duration"
}
}
}
}
}]
Output:
{
"event_type" : [ {
"id" : "CYY7",
"type" : "types",
"description" : null,
"color" : "#dfc12d",
"duration" : 15
}, {
"id" : "BGER",
"type" : "types",
"description" : null,
"color" : "#8989fc",
"duration" : 30
} ]
}