80 lines
1.8 KiB
Plaintext
80 lines
1.8 KiB
Plaintext
[[reindex_examples]]
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=== Reindex
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The `reindex` API extracts the document source from the source index and indexes
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the documents into the destination index. You can copy all documents to the
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destination index, reindex a subset of the documents or update the source before
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to reindex it.
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In the following example we have a `game-of-thrones` index which contains
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different quotes of various characters, we want to create a new index only for
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the house Stark and remove the `house` field from the document source.
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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({
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cloud: { id: '<cloud-id>' },
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auth: { apiKey: 'base64EncodedKey' }
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})
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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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document: {
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character: 'Ned Stark',
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quote: 'Winter is coming.',
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house: 'stark'
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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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document: {
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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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house: 'stark'
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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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document: {
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character: 'Tyrion Lannister',
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quote: 'A Lannister always pays his debts.',
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house: 'lannister'
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}
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})
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await client.reindex({
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wait_for_completion: true,
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refresh: true,
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source: {
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index: 'game-of-thrones',
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query: {
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match: { character: 'stark' }
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}
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},
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dest: {
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index: 'stark-index'
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},
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script: {
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lang: 'painless',
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source: 'ctx._source.remove("house")'
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}
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})
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const result = await client.search({
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index: 'stark-index',
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query: { match_all: {} }
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})
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console.log(result.hits.hits)
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}
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run().catch(console.log)
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----
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