dyngoose/src/query/transact-write.ts

Elegant DynamoDB object modeling for Typescript

import { type DynamoDB, type TransactWriteItemsOutput, type TransactWriteItem } from '@aws-sdk/client-dynamodb'
import { chunk } from 'lodash'
import { HelpfulError } from '../errors'

// this is limit of dynamoDB
const MAX_ITEMS = 25

export async function transactWrite(
  documentClient: DynamoDB,
  requests: TransactWriteItem[],
): Promise<TransactWriteItemsOutput> {
  const chunks = chunk(requests, MAX_ITEMS)
  await Promise.all(
    chunks.map(async (transactItems) => {
      try {
        return await documentClient.transactWriteItems({
          TransactItems: transactItems,
        })
      } catch (ex) {
        throw new HelpfulError(ex, undefined, { TransactItems: transactItems })
      }
    }),
  )

  // there is nothing to merge because we do not ask for ConsumedCapacity or ItemCollectionMetrics
  const output: TransactWriteItemsOutput = {}
  return output
}