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更新

更新 API 允许使用给定的脚本更新特定文档。在下面的示例中，我们将索引一个文档，该文档还跟踪某个角色说过某个引号的次数，然后我们将更新times字段。

'use strict'

const { Client } = require('@elastic/elasticsearch')
const client = new Client({
  cloud: { id: '<cloud-id>' },
  auth: { apiKey: 'base64EncodedKey' }
})

async function run () {
  await client.index({
    index: 'game-of-thrones',
    id: '1',
    document: {
      character: 'Ned Stark',
      quote: 'Winter is coming.',
      times: 0
    }
  })

  await client.update({
    index: 'game-of-thrones',
    id: '1',
    script: {
      lang: 'painless',
      source: 'ctx._source.times++'
      // you can also use parameters
      // source: 'ctx._source.times += params.count',
      // params: { count: 1 }
    }
  })

  const document = await client.get({
    index: 'game-of-thrones',
    id: '1'
  })

  console.log(document)
}

run().catch(console.log)

使用更新 API，您还可以对文档进行部分更新。

'use strict'

const { Client } = require('@elastic/elasticsearch')
const client = new Client({
  cloud: { id: '<cloud-id>' },
  auth: { apiKey: 'base64EncodedKey' }
})

async function run () {
  await client.index({
    index: 'game-of-thrones',
    id: '1',
    document: {
      character: 'Ned Stark',
      quote: 'Winter is coming.',
      isAlive: true
    }
  })

  await client.update({
    index: 'game-of-thrones',
    id: '1',
    doc: {
      isAlive: false
    }
  })

  const document = await client.get({
    index: 'game-of-thrones',
    id: '1'
  })

  console.log(document)
}

run().catch(console.log)

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