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JavaScript lang Plugin for Elasticsearch

The JavaScript language plugin allows to have javascript (or js) as the language of scripts to execute.

In order to install the plugin, simply run: bin/plugin -install elasticsearch/elasticsearch-lang-javascript/2.1.0.

For master elasticsearch versions, look at master branch.
For 1.3.x elasticsearch versions, look at es-1.3 branch.
For 1.2.x elasticsearch versions, look at es-1.2 branch.
For 1.1.x elasticsearch versions, look at es-1.1 branch.
For 1.0.x elasticsearch versions, look at es-1.0 branch.
For 0.90.x elasticsearch versions, look at es-0.90 branch.

JavaScript Lang Plugin	elasticsearch	rhino	Release date
3.0.0-SNAPSHOT	master	1.7R4	XXXX-XX-XX

Please read documentation relative to the version you are using:

3.0.0-SNAPSHOT

Using javascript with function_score

Let's say you want to use function_score API using javascript. Here is a way of doing it:

curl -XDELETE "http://localhost:9200/test"

curl -XPUT "http://localhost:9200/test/doc/1" -d '{
  "num": 1.0
}'

curl -XPUT "http://localhost:9200/test/doc/2?refresh" -d '{
  "num": 2.0
}'

curl -XGET "http://localhost:9200/test/_search?pretty" -d '
{
  "query": {
    "function_score": {
      "script_score": {
        "script": "doc[\"num\"].value",
        "lang": "javascript"
      }
    }
  }
}'

gives

{
   // ...
   "hits": {
      "total": 2,
      "max_score": 4,
      "hits": [
         {
            // ...
            "_score": 4
         },
         {
            // ...
            "_score": 1
         }
      ]
   }
}

Using javascript with script_fields

curl -XDELETE "http://localhost:9200/test"

curl -XPUT "http://localhost:9200/test/doc/1?refresh" -d'
{
  "obj1": {
   "test": "something"
  },
  "obj2": {
    "arr2": [ "arr_value1", "arr_value2" ]
  }
}'

curl -XGET "http://localhost:9200/test/_search" -d'
{
  "script_fields": {
    "s_obj1": {
      "script": "_source.obj1", "lang": "js"
    },
    "s_obj1_test": {
      "script": "_source.obj1.test", "lang": "js"
    },
    "s_obj2": {
      "script": "_source.obj2", "lang": "js"
    },
    "s_obj2_arr2": {
      "script": "_source.obj2.arr2", "lang": "js"
    }
  }
}'