Elasticsearch - terms lookup - filter - elasticsearch

Question

I have two indices: users and cars
users contains user_id and car ratings of the user.
ratings objects represent car ratings (by the user)
"user_id": 3,
"ratings": [
{
"score": 10.0,
"car_id": "xxx"
},
{
"score": 50.0,
"car_id": "yyy"
}
]
I'm trying to build a query that fetches cars, rated by user 3 with score higher than 20.
That means, the query would return "yyy" car only (based on the document above) as user 3 has two ratings, but only of them has score greater than 20.
I've managed to build a query that returns all cars rated by a given user.
GET _search
{
"query": {
"bool": {
"filter": [
{
"terms": {
"car_id": {
"index": "users",
"type": "_doc",
"id": "3",
"path": "ratings.car_id"
}
}
}
]
}
}
}
The problem is that I can't figure out how to filter ratings by the ratings.score.
This query is not returning any car even if there are two cars rated by the user 3 with score greater than 20:
GET _search
{
"query": {
"bool": {
"filter": [
{
"terms": {
"car_id": {
"index": "users",
"type": "_doc",
"id": "3",
"path": "ratings.car_id"
}
}
},
{
"range": {
"ratings.score": {
"gte": 20
}
}
}
]
}
}
}
Can you tell me what's wrong and how to make it work?
MAPPINGS
users
{
"mappings": {
"_doc": {
"properties": {
"ratings": {
"type": "nested",
"properties": {
"car_id": {
"type": "text"
},
"score": {
"type": "float"
},
"type": {
"type": "text",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above": 256
}
}
}
}
},
"user_id": {
"type": "integer"
}
}
}
}
}
cars
{
"mappings": {
"_doc": {
"properties": {
"name": {
"type": "text"
},
"color": {
"type": "boolean"
},
....

Answer 1

The field "ratings" is nested. Recommend use Nested Query.
I couldnt test this query:
"filter": [
{
"terms": {
"car_id": {
"index": "users",
"id": "3",
"path": "user_id"
}
}
},
{
"nested": {
"path": "ratings",
"query": {
"range": {
"ratings.score": {
"gte": 20
}
}
}
}
}
]