Elasticsearch aggregations, get additional field in bucket - elasticsearch

Question

I query ES index to filter results and get aggregations by selected terms. A sample query is like this:
GET buyer_requests/vehicle_requests/_search
{
"query": {
"filtered": {
"filter": {
"and": [
{
"terms": {
"vehicle.make.raw": [
"Audi",
"BMW",
"Chevrolet"
]
}
},
{
"range": {
"style.price": {
"gte": 15000,
"lte": 20000
}
}
},
{
"geo_distance": {
"distance": "20000km",
"info.pin": {
"lat": 42,
"lon": 21
}
}
}
]
}
}
},
"aggs": {
"makes": {
"filter": {
"range": {
"style.price": {
"gte": 5000,
"lte": 40000
}
}
},
"aggs": {
"makes": {
"terms": {
"field": "vehicle.make.raw",
"order": {
"_term": "asc"
}
}
}
}
},
"model": {
"filter": {
"and": [
{
"terms": {
"vehicle.make.raw": [
"Audi",
"BMW",
"Chevrolet"
]
}
}
]
},
"aggs": {
"models": {
"terms": {
"field": "vehicle.model.raw",
"size": 10,
"order": {
"_term": "asc"
}
}
}
}
}
}
}
The result I get is something like:
How can I get in "buckets" section on "models" terms another field from result set. I want to get reference to Makes so the result would look like this:
"model": {
"doc_count": 7,
"models": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 0,
"buckets": [
{
"key": "3 Series",
"make": "bmw", <----------- this key
"doc_count": 3
},
{
"key": "4 Series",
"make": "bmw", <----------- this key
"doc_count": 4
},
{
"key": "Camaro",
"make": "chevrolet", <----------- this key
"doc_count": 2
}
]
}
}

Answer 1

You need to move your models aggregation as a sub-aggregation of the make aggregation and re-arrange the filter aggregation a bit. The result won't be syntactically like you expect, but semantically you'll get the data you need.
GET buyer_requests/vehicle_requests/_search
{
"query": {
"filtered": {
"filter": {
"and": [
{
"terms": {
"vehicle.make.raw": [
"Audi",
"BMW",
"Chevrolet"
]
}
},
{
"range": {
"style.price": {
"gte": 15000,
"lte": 20000
}
}
},
{
"geo_distance": {
"distance": "20000km",
"info.pin": {
"lat": 42,
"lon": 21
}
}
}
]
}
}
},
"aggs": {
"makes": {
"filter": {
"and": [
{
"terms": {
"vehicle.make.raw": [
"Audi",
"BMW",
"Chevrolet"
]
}
},
{
"range": {
"style.price": {
"gte": 5000,
"lte": 40000
}
}
}
]
},
"aggs": {
"makes": {
"terms": {
"field": "vehicle.make.raw",
"order": {
"_term": "asc"
}
},
"aggs": {
"models": {
"terms": {
"field": "vehicle.model.raw",
"size": 10,
"order": {
"_term": "asc"
}
}
}
}
}
}
}
}
}