Query ElasticSearch by array filter length - arrays

Question

I have a prop containing an array of integers:
_source: {
counts: [
11,
7,
18,
3,
22
]
}
From another post I know that I can filter by a range using:
{
"query": {
"bool": {
"must": {
"match_all": {}
},
"filter": {
"range": {
"counts": {
"gte": 10,
"lte": 20
}
}
}
}
}
}
However, I need to additionally know if the range match count is greater than a certain number. For instance, I only want records back which have less than 3 counts matching between 10 and 20.

Answer 1

Mapping used:
{
"properties" : {
"counts" : {
"type" : "integer"
}
}
}
These are the docs I indexed:
{
"took": 4,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 3,
"max_score": 1,
"hits": [
{
"_index": "test_index",
"_type": "test",
"_id": "2",
"_score": 1,
"_source": {
"counts": [
13,
17
]
}
},
{
"_index": "test_index",
"_type": "test",
"_id": "1",
"_score": 1,
"_source": {
"counts": [
11,
7,
18,
3,
22
]
}
},
{
"_index": "test_index",
"_type": "test",
"_id": "3",
"_score": 1,
"_source": {
"counts": [
11,
19
]
}
}
]
}
}
Now try this query:
{
"query": {
"bool": {
"must": {
"match_all": {}
},
"filter": [
{"script" : { "script" : "doc['counts'].values.size() < 4" }},
{"range": { "counts": { "gte": 10, "lte": 20 } }}
]
}
}
}
Results: Only doc id 2 and 3 are returned. Doc 1 is not returned.
{
"took": 29,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 2,
"max_score": 1,
"hits": [
{
"_index": "test_index",
"_type": "test",
"_id": "2",
"_score": 1,
"_source": {
"counts": [
13,
17
]
}
},
{
"_index": "test_index",
"_type": "test",
"_id": "3",
"_score": 1,
"_source": {
"counts": [
11,
19
]
}
}
]
}
}
Is this what you are trying to do?