ElasticSearch Field boosting using java api

elasticsearch, search

Solution

Edit: This has changed and does no longer work in ES 6.x and upwards.

You should also be able to boost a field directly in the Multi-match query:

"The multi_match query supports field boosting via ^ notation in the fields json field.

{
  "multi_match" : {
    "query" : "this is a test",
    "fields" : [ "subject^2", "message" ]
  } 
}

In the above example hits in the subject field are 2 times more important than in the message field."

In the java-api, just use the MultiMatchQueryBuilder:

MultiMatchQueryBuilder builder = 
new MultiMatchQueryBuilder( keyword, "th_name^2", "th_description", "th_show_title", "th_sh_category" );

Disclaimer: Not tested

Problem

I am new to ES and trying to search using java apis. I am unable to figure out how I can provide filed specific boosting using the java apis. Here is the example: My index document looks like: _source": { ``` "th_id": 1, "th_name": "test name", "th_description": "test desc", "th_image": "test-img", "th_slug": "Make-Me-Smart", "th_show_title": "Coast Tech Podcast", "th_sh_category": "Alternative Health ``` } When i search for keywords I want to boost the results higher if they found in the "th_name" compared to they're found in some other fields. Currently I am using below code to do search: ``` QueryBuilder qb1 = QueryBuilders.multiMatchQuery(keyword, "th_name", "th_description", "th_show_title", "th_sh_category"); SearchResponse response = client.prepareSearch("talk").setTypes("themes") .setSearchType(SearchType.DFS_QUERY_THEN_FETCH).setQuery(qb1) .setFrom(start).setSize(maxRows) .setExplain(true).execute().actionGet(); ``` Is there anything I can do at query time to boost the document if the keyword is found in "th_name" field compared to found in other fields?

Original source