AWS dynamodb batch write helper

dynamodb-batch-write.js

function breakArrayIntoGroups(data, maxPerGroup) {
  const groups = [];

  for (let index = 0; index < data.length; index += maxPerGroup) {
    groups.push(data.slice(index, index + maxPerGroup));
  }

  return groups;
}

const dyn = (items, table) =>
  new Promise(async res => {
    try {
      const datagr = breakArrayIntoGroups(items, 25);

      for (let i = 0; i < datagr.length; i += 1) {
        const po = [];

        for (let i2 = 0; i2 < datagr[i].length; i2 += 1) {
          const item = datagr[i][i2];

          po.push({ PutRequest: { Item: item } });
        }

        const params = { RequestItems: { [`${table}`]: po } };
        const db = new AWS.DynamoDB({ apiVersion: "2012-10-08" });

        try {
          // eslint-disable-next-line no-await-in-loop
          await db.batchWriteItem(params).promise();
        } catch (e) {
          console.error(`failed with:${po.length} on:${e}`);
        }
      }
    } catch (e) {
      console.error(`failed:${e}`);
    }

    res();
  });

//eg
var items = [{ id: 1 }];
await dyn(items, "testtable");