give more score to specific document in elasticsearch query - elasticsearch

Question

consider I have this full text query :
GET /test/_search
{
"query": {
"match": {
"title": "blue"
}
}
}
and I got this result :
{
"took": 1,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 4,
"relation": "eq"
},
"max_score": 0.32156613,
"hits": [
{
"_index": "test",
"_id": "rQ5WIYYBUZECFnMRbIo6",
"_score": 0.32156613,
"_source": {
"title": "blue chair blue desk"
}
},
{
"_index": "test",
"_id": "qg5VIYYBUZECFnMRrorJ",
"_score": 0.29879427,
"_source": {
"title": "blue bird"
}
},
{
"_index": "test",
"_id": "qw5VIYYBUZECFnMR8IpD",
"_score": 0.29879427,
"_source": {
"title": "blue sky"
}
},
{
"_index": "test",
"_id": "rg5WIYYBUZECFnMRsoqo",
"_score": 0.29879427,
"_source": {
"title": "blue automobile"
}
}
]
}
}
you see scoring is completely working fine, but I want to specifically give more score to the document with title:"blue sky" whenever the search is blue so it would be my top result.
Is there any way to specifically increase the score of some documents while querying in Elasticsearch ?
I think it could be done by combining match and positive boost query but and I couldn't do that

Answer 1

An option is using boosting query. You can decrease the scoring document that you do not want.
I applied a negative boost to documents without the term sky in the example.
{
"query": {
"boosting": {
"positive": {
"match": {
"title": "blue"
}
},
"negative": {
"bool": {
"must_not": [
{
"match": {
"title": "sky"
}
}
]
}
},
"negative_boost": 0.1
}
}
}