Trying to implement ElasticSearch sorting conditionally - php

Question

Here is my mapping :-
{
"test": {
"aliases": {
},
"mappings": {
"courses": {
"properties": {
"is_sponsored": {
"type": "long"
},
"sponsored_end_date": {
"type": "date",
"format": "yyyy-MM-dd HH:mm:ss"
},
"sponsored_start_date": {
"type": "date",
"format": "yyyy-MM-dd HH:mm:ss"
},
"settings": {
"index": {
"creation_date": "1609945591003",
"number_of_shards": "5",
"number_of_replicas": "1",
"uuid": "3S6mwaIbSFuTKPtuj8sSWw",
"version": {
"created": "6070199"
},
"provided_name": "test"
}
}
}
}
}
}
}
I want to show those courses at the top whose "is_sponsored" value is true and current date lies between "sponsored_start_date" and "sponsored_end_date". Once the "sponsored_end_date" is passed it should show at the normal position. I'm new in ElasticSearch so kindly suggest a way to do this. I'm using php.
Thanks

Answer 1

You can use function_score to boost certain documents
Query
{
"query": {
"function_score": {
"query": {
"match_all": {}
},
"functions": [
{
"filter": {
"bool": {
"must": [
{
"term": {
"is_sponsored": 1
}
},
{
"range": {
"sponsored_start_date": {
"lte": "now"
}
}
},
{
"range": {
"sponsored_end_date": {
"gte": "now"
}
}
}
]
}
},
"weight": 10
}
],
"score_mode": "sum"
}
}
}
Result
"hits" : [
{
"_index" : "index45",
"_type" : "_doc",
"_id" : "sdb6L3wBJ0n9LhX2J02r",
"_score" : 10.0,
"_source" : {
"is_sponsored" : 1,
"sponsored_start_date" : "2021-09-01",
"sponsored_end_date" : "2021-09-30"
}
},
{
"_index" : "index45",
"_type" : "_doc",
"_id" : "stb6L3wBJ0n9LhX2PE0c",
"_score" : 1.0,
"_source" : {
"is_sponsored" : 0,
"sponsored_start_date" : "2021-09-01",
"sponsored_end_date" : "2021-09-30"
}
},
{
"_index" : "index45",
"_type" : "_doc",
"_id" : "s9b6L3wBJ0n9LhX2Z00v",
"_score" : 1.0,
"_source" : {
"is_sponsored" : 1,
"sponsored_start_date" : "2021-10-01",
"sponsored_end_date" : "2021-10-30"
}
}
]
Documents which satisfy all three condition will get higher weight. Rest of the documents will have normal scoring.