Combine inner hits in elasticsearch? - elasticsearch

Question

I currently have a dataset that features a nested datatype in products, these are all listed within different vendors. I have various queries that check for search terms within the nested products array, ideally I want to be able to combine all the inner hits so that I can sort on such things as score rankings and price. At the moment the search results come back on a per document basis. Is it possible to combine inner hits in elasticsearch so that I get just a list of all the matching products?
Example Query
{
"_source": {
"includes": [ "*" ],
"excludes": [ "products" ]
},
"query": {
"nested": {
"path": "products",
"inner_hits": {
"size": 10,
"_source": [
"title"
]
},
"query": {
"bool": {
"must": [
{
"match": {
"products.title" : {
"query": "Dress",
"fuzziness" : 0
}
}
}
]
}
}
}
}
}
Example output
{
"took": 477,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 2,
"max_score": 2.9072125,
"hits": [
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a806c7af36d28314de953ff",
"_score": 2.9072125,
"_source": {
"name": "Argos",
"locations": [
{
"lon": -2.242797,
"lat": 53.482952
}
]
},
"inner_hits": {
"products": {
"hits": {
"total": 3,
"max_score": 3.0782251,
"hits": [
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a806c7af36d28314de953ff",
"_nested": {
"field": "products",
"offset": 3348
},
"_score": 3.0782251,
"_source": {
"title": "HOME Set of 2 Dress Covers - White"
}
},
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a806c7af36d28314de953ff",
"_nested": {
"field": "products",
"offset": 2599
},
"_score": 3.0782251,
"_source": {
"title": "Chad Valley Designabear Spotty Dress Outfit"
}
},
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a806c7af36d28314de953ff",
"_nested": {
"field": "products",
"offset": 771
},
"_score": 2.5651875,
"_source": {
"title": "Melissa and Doug Abby & Emma Magnetic Wooden Dress Up"
}
}
]
}
}
}
},
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a5c3beb734d1d3471839b1d",
"_score": 2.3227787,
"_source": {
"name": "Superdry",
"locations": [
{
"lon": -2.241703,
"lat": 53.483469
}
]
},
"inner_hits": {
"products": {
"hits": {
"total": 186,
"max_score": 2.378731,
"hits": [
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a5c3beb734d1d3471839b1d",
"_nested": {
"field": "products",
"offset": 6420
},
"_score": 2.378731,
"_source": {
"title": "Alexia Off Shoulder Dress"
}
},
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a5c3beb734d1d3471839b1d",
"_nested": {
"field": "products",
"offset": 6417
},
"_score": 2.378731,
"_source": {
"title": "Erin Festival Skater Dress "
}
},
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a5c3beb734d1d3471839b1d",
"_nested": {
"field": "products",
"offset": 6416
},
"_score": 2.378731,
"_source": {
"title": "Erin Racer Dress "
}
},
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a5c3beb734d1d3471839b1d",
"_nested": {
"field": "products",
"offset": 6415
},
"_score": 2.378731,
"_source": {
"title": "Alice Knot Dress"
}
},
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a5c3beb734d1d3471839b1d",
"_nested": {
"field": "products",
"offset": 6412
},
"_score": 2.378731,
"_source": {
"title": "Alice Knot Dress"
}
},
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a5c3beb734d1d3471839b1d",
"_nested": {
"field": "products",
"offset": 6389
},
"_score": 2.378731,
"_source": {
"title": "Lagoon Logo Midi Dress"
}
},
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a5c3beb734d1d3471839b1d",
"_nested": {
"field": "products",
"offset": 6388
},
"_score": 2.378731,
"_source": {
"title": "50's Boardwalk Dress "
}
},
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a5c3beb734d1d3471839b1d",
"_nested": {
"field": "products",
"offset": 6386
},
"_score": 2.378731,
"_source": {
"title": "50's Boardwalk Dress "
}
},
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a5c3beb734d1d3471839b1d",
"_nested": {
"field": "products",
"offset": 6385
},
"_score": 2.378731,
"_source": {
"title": "Graphic Sweat Dress"
}
},
{
"_index": "shopit",
"_type": "businesses",
"_id": "5a5c3beb734d1d3471839b1d",
"_nested": {
"field": "products",
"offset": 6382
},
"_score": 2.378731,
"_source": {
"title": "Breton Bardot Stripe Dress"
}
}
]
}
}
}
}
]
}
}

Answer 1

Nevermind, I should of paid better attention to the elasticsearch documentation which states:
Search requests return the whole document, not just the matching
nested documents. Although there are plans afoot to support returning
the best -matching nested documents with the root document, this is
not yet supported.
I think parent-child relationships are probably the way to go with this.