es-painless-fields

es-painless-fields

Helpers for bulk update Elasticsearch documents by query using Painless scripts

Install

$ yarn add es-painless-fields

Features & Motivation

The main purpose is to utilize _update_by_query Elasticsearch API most efficiently. API is limited to updating documents in-place by scripts, so you cannot rely on ES to replace document by passing partial parameters. This package aims to ease partial bulk document updates.

• In-place set values to fields
• In-place replace values in fields
• Zero dependencies!
• ... to be done

Usage

const esClient = require('elasticsearch').Client();
const painlessFields = require('es-painless-fields');

const script = painlessFields.set({a: 1, b: 2});

esClient.updateByQuery({
  conflicts: 'proceed',
  body: {
    query: {match_all: {}},
    script
  }
});

API

.set(fieldsMap)

fieldsMap

Type: Object

Object fields which you would like to set. Example: {a: 1, b: 2}

Also can be in a flat form, like {'a.b.c': 1}

.replace(fieldsReplacements)

fieldsReplacements

Type: Array

Array of objects describing what to replace. Example:

const fieldsReplacements = [
  {field: 'a', pattern: 'foo', substring: 'bar'},
  {field: 'b', pattern: 'hello', substring: 'world'},
];

Returns a script which replaces fields by pattern with substrings. Example:

{
	"lang": "painless",
	"source": "ctx._source.a = ctx._source.a.replace(params.patterns[0], params.substrings[0]); ctx._source.b = ctx._source.b.replace(params.patterns[1], params.substrings[1]);",
	"params": {
		"patterns": ["foo", "hello"],
		"substrings": ["bar", "world"]
	}
}

License

MIT © Vlad Holubiev