boosted_syn.mvel

termInfo = _index[field].get(term,_PAYLOADS);
score = 0;
for (pos : termInfo) {
    score = score + pos.payloadAsFloat(0);
}
return score;

gistfile1.ps1

curl -XPUT "http://localhost:9200/syn" -d'
{
  "settings": {
     "index": {
        "analysis": {
           "analyzer": {
             "boosted_syn" : {
               "tokenizer" : "whitespace",
               "filter" : [
                 "lowercase",
                 "syns",
                 "delimited_payload_filter"
                ]
             }
           },
           "filter" : {
             "syns" : {
               "type" : "synonym",
               "synonyms" : [
                  "potato=>vegetable|3",
                  "tomato=>vegetable|2",
                  "carrot=>vegetable|1"
                ]
             }
           }
        }
     }
  },
  "mappings": {
    "data" : {
      "properties": {
        "title" : {
          "type": "string",
          "analyzer": "boosted_syn"
        }
      }
    }
  }
}'

curl -XPOST "http://localhost:9200/syn/data/1" -d'
{
  "title" : "vegetable"
}'

curl -XPOST "http://localhost:9200/syn/data/2" -d'
{
  "title" : "potato"
}'

curl -XPOST "http://localhost:9200/syn/data/3" -d'
{
  "title" : "tomato"
}'

curl -XPOST "http://localhost:9200/syn/data/4" -d'
{
  "title" : "carrot"
}'


curl -XGET "http://localhost:9200/syn/data/_search" -d'
{
  "query": {
    "function_score" : {
      "query" : {
        "match": {
            "title": "vegetable"
          }
      },
      "script_score" : {
        "script" : "boosted_syn",
        "params" : {
          "field" : "title",
          "term" : "vegetable"
        }
      },
      "boost_mode" : "replace"
    }
  }
}'