179 lines
4.9 KiB
Markdown
179 lines
4.9 KiB
Markdown
Python lang Plugin for Elasticsearch
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==================================
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The Python (jython) language plugin allows to have `python` as the language of scripts to execute.
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In order to install the plugin, simply run:
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```sh
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bin/plugin install elasticsearch/elasticsearch-lang-python/2.5.0
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```
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You need to install a version matching your Elasticsearch version:
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| elasticsearch | Python Lang Plugin | Docs |
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| master | Build from source | See below |
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| es-1.x | Build from source | [2.6.0-SNAPSHOT](https://github.com/elasticsearch/elasticsearch-lang-python/tree/es-1.x/#version-260-snapshot-for-elasticsearch-1x) |
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| es-1.5 | 2.5.0 | [2.5.0](https://github.com/elastic/elasticsearch-lang-python/tree/v2.5.0/#version-250-for-elasticsearch-15) |
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| es-1.4 | 2.4.1 | [2.4.1](https://github.com/elasticsearch/elasticsearch-lang-python/tree/v2.4.1/#version-241-for-elasticsearch-14) |
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| es-1.3 | 2.3.1 | [2.3.1](https://github.com/elasticsearch/elasticsearch-lang-python/tree/v2.3.1/#version-231-for-elasticsearch-13) |
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| < 1.3.5 | 2.3.0 | [2.3.0](https://github.com/elasticsearch/elasticsearch-lang-python/tree/v2.3.0/#version-230-for-elasticsearch-13) |
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| es-1.2 | 2.2.0 | [2.2.0](https://github.com/elasticsearch/elasticsearch-lang-python/tree/v2.2.0/#python-lang-plugin-for-elasticsearch) |
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| es-1.0 | 2.0.0 | [2.0.0](https://github.com/elasticsearch/elasticsearch-lang-python/tree/v2.0.0/#python-lang-plugin-for-elasticsearch) |
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| es-0.90 | 1.0.0 | [1.0.0](https://github.com/elasticsearch/elasticsearch-lang-python/tree/v1.0.0/#python-lang-plugin-for-elasticsearch) |
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To build a `SNAPSHOT` version, you need to build it with Maven:
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```bash
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mvn clean install
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plugin install lang-python \
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--url file:target/releases/elasticsearch-lang-python-X.X.X-SNAPSHOT.zip
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```
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User Guide
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----------
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Using python with function_score
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--------------------------------
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Let's say you want to use `function_score` API using `python`. Here is
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a way of doing it:
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```sh
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curl -XDELETE "http://localhost:9200/test"
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curl -XPUT "http://localhost:9200/test/doc/1" -d '{
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"num": 1.0
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}'
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curl -XPUT "http://localhost:9200/test/doc/2?refresh" -d '{
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"num": 2.0
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}'
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curl -XGET "http://localhost:9200/test/_search?pretty" -d'
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{
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"query": {
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"function_score": {
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"script_score": {
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"script": "doc[\"num\"].value * _score",
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"lang": "python"
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}
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}
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}
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}'
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```
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gives
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```javascript
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{
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// ...
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"hits": {
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"total": 2,
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"max_score": 2,
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"hits": [
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{
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// ...
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"_score": 2
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},
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{
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// ...
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"_score": 1
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}
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]
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}
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}
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```
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Using python with script_fields
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-------------------------------
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```sh
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curl -XDELETE "http://localhost:9200/test"
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curl -XPUT "http://localhost:9200/test/doc/1?refresh" -d'
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{
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"obj1": {
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"test": "something"
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},
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"obj2": {
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"arr2": [ "arr_value1", "arr_value2" ]
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}
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}'
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curl -XGET "http://localhost:9200/test/_search" -d'
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{
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"script_fields": {
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"s_obj1": {
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"script": "_source[\"obj1\"]", "lang": "python"
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},
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"s_obj1_test": {
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"script": "_source[\"obj1\"][\"test\"]", "lang": "python"
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},
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"s_obj2": {
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"script": "_source[\"obj2\"]", "lang": "python"
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},
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"s_obj2_arr2": {
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"script": "_source[\"obj2\"][\"arr2\"]", "lang": "python"
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}
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}
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}'
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```
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gives
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```javascript
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{
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// ...
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"hits": [
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{
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// ...
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"fields": {
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"s_obj2_arr2": [
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[
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"arr_value1",
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"arr_value2"
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]
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],
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"s_obj1_test": [
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"something"
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],
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"s_obj2": [
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{
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"arr2": [
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"arr_value1",
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"arr_value2"
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]
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}
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],
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"s_obj1": [
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{
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"test": "something"
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}
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]
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}
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}
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]
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}
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```
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License
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-------
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This software is licensed under the Apache 2 license, quoted below.
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Copyright 2009-2014 Elasticsearch <http://www.elasticsearch.org>
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Licensed under the Apache License, Version 2.0 (the "License"); you may not
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use this file except in compliance with the License. You may obtain a copy of
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the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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License for the specific language governing permissions and limitations under
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the License.
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