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/2.7.0You need to install a version matching your Elasticsearch version:
| elasticsearch | JavaScript Plugin | Docs |
|---|---|---|
| master | Build from source | See below |
| es-1.7 | 2.7.0 | 2.7.0 |
| es-1.6 | 2.6.0 | 2.6.0 |
| es-1.5 | 2.5.0 | 2.5.0 |
| es-1.4 | 2.4.1 | 2.4.1 |
| es-1.3 | 2.3.1 | 2.3.1 |
| es-1.2 | 2.2.0 | 2.2.0 |
| es-1.1 | 2.1.0 | 2.1.0 |
| es-1.0 | 2.0.0 | 2.0.0 |
| es-0.90 | 1.4.0 | 1.4.0 |
To build a SNAPSHOT version, you need to build it with Maven:
mvn clean install plugin --install lang-javascript \ --url file:target/releases/elasticsearch-lang-javascript-X.X.X-SNAPSHOT.zipLet'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 } ] } }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" } } }'gives
{ // ... "hits": [ { // ... "fields": { "s_obj2_arr2": [ [ "arr_value1", "arr_value2" ] ], "s_obj1_test": [ "something" ], "s_obj2": [ { "arr2": [ "arr_value1", "arr_value2" ] } ], "s_obj1": [ { "test": "something" } ] } } ] }This software is licensed under the Apache 2 license, quoted below. Copyright 2009-2014 Elasticsearch <http://www.elasticsearch.org> Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.