60 lines
1.2 KiB
Plaintext
60 lines
1.2 KiB
Plaintext
[[update_by_query_examples]]
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== Update By Query
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The simplest usage of _update_by_query just performs an update on every document in the index without changing the source. This is useful to pick up a new property or some other online mapping change.
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[source,js]
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---------
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'use strict'
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const { Client } = require('@elastic/elasticsearch')
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const client = new Client({ node: 'http://localhost:9200' })
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async function run () {
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await client.index({
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index: 'game-of-thrones',
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body: {
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character: 'Ned Stark',
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quote: 'Winter is coming.'
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}
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})
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await client.index({
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index: 'game-of-thrones',
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refresh: true,
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body: {
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character: 'Arya Stark',
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quote: 'A girl is Arya Stark of Winterfell. And I\'m going home.'
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}
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})
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await client.updateByQuery({
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index: 'game-of-thrones',
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refresh: true,
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body: {
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script: {
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lang: 'painless',
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source: 'ctx._source["house"] = "stark"'
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},
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query: {
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match: {
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character: 'stark'
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}
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}
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}
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})
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const { body } = await client.search({
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index: 'game-of-thrones',
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body: {
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query: { match_all: {} }
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}
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})
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console.log(body.hits.hits)
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}
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run().catch(console.log)
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---------
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