Elasticsearch plugin which scores documents by computing the distance between payload values and input values for each term.
Setting up the index for payloads:
curl -XPUT 'http://localhost:9200/items' -d '{
"settings": {
"analysis": {
"analyzer": {
"payloads": {
"type": "custom",
"tokenizer": "whitespace",
"filter": [
"lowercase",
"delimited_payload_filter"
]
}
}
}
},
"mappings": {
"outfit": {
"properties": {
"simterms": {
"type": "text",
"analyzer": "payloads",
"term_vector": "with_positions_offsets_payloads"
},
"colors": {
"type": "text",
"analyzer": "payloads",
"term_vector": "with_positions_offsets_payloads"
}
}
}
}
}'
Indexing some documents
curl -XPUT 'http://localhost:9200/items/outfit/1' -d '{
"name": "flowing dress",
"simterms": "a|100.0 b|100.0 c|100.0",
"colors": "blue|100.0"
}'
curl -XPUT 'http://localhost:9200/items/outfit/2' -d '{
"name": "blue dress",
"simterms": "a|200.0 b|100.0 c|50.0",
"colors": "green|100.0"
}'
curl -XPUT 'http://localhost:9200/items/outfit/3' -d '{
"name": "moo dress bing",
"simterms": "a|300.0 b|100.0 c|50.0",
"colors": "red|100.0"
}'
Querying
curl -XGET 'http://localhost:9200/items/_search?pretty' -d '{
"query": {
"function_score": {
"query": {
"match": {
"name": "dress"
}
},
"script_score": {
"script": {
"lang": "native",
"inline": "payload_distance_score",
"params": {
"fields": [
{
"field": "simterms",
"term_values": {
"a": 300.0,
"b": 100.0,
"d": 100.0
},
"boost": 2.0,
"absent_term_bury": 0.1
},
{
"field": "colors",
"term_values": {
"green": 100.0
},
"boost": 3.0,
"absent_term_bury": 0.2
}
]
}
}
}
}
}
}'
Results
{
"took" : 3,
"timed_out" : false,
"_shards" : {
"total" : 5,
"successful" : 5,
"failed" : 0
},
"hits" : {
"total" : 3,
"max_score" : -0.06452902,
"hits" : [
{
"_index" : "items",
"_type" : "outfit",
"_id" : "2",
"_score" : -0.06452902,
"_source" : {
"name" : "blue dress",
"simterms" : "a|200.0 b|100.0 c|50.0",
"colors" : "green|100"
}
},
{
"_index" : "items",
"_type" : "outfit",
"_id" : "1",
"_score" : -0.10324643,
"_source" : {
"name" : "flowing dress",
"simterms" : "a|100.0 b|100.0 c|100.0",
"colors" : "blue|100"
}
},
{
"_index" : "items",
"_type" : "outfit",
"_id" : "3",
"_score" : -0.12658012,
"_source" : {
"name" : "moo dress bing",
"simterms" : "a|300.0 b|100.0 c|50.0",
"colors" : "red|100"
}
}
]
}
}esVersion=5.4.3 gradle clean assemble
cd /path/to/elasticsearch-5.4.3 && ./bin/elasticsearch-plugin install file:///path/to/elasticsearch-payload-distance-1.0.0_es5.4.3