Utils for AWS SDK

Installation

# NPM
npm install aws-sdk-utils --save

DynamoDB Utils for DocumentClient

ddbFind(client, params)

Like query or scan but managing the LastEvaluatedKey value. Furthermore filter, map and reduce funtions over Items results.

ddbBatchGet(client, params)

Like batchGet but managing the UnprocessedKeys values.

ddbBatchGets(client, params)

Like ddbBatchGet but without limit of RequestItems.

ddbBatchWrite(client. params)

Like batchWrite but managing the UnprocessedKeys values.

ddbBatchWrites(client, params)

Like ddbBatchWrite but without limit of RequestItems.

Example

Get and Delete 1000 Items from dynamodb table with hash 'JobId' and range 'Id'.

const { ddbFind, ddbBatchWrites } = require('aws-sdk-utils');
const AWS = require('aws-sdk');

const client = new AWS.DynamoDB.DocumentClient();

// Some code ...

const TableName = 'JobsTasksTable';
let params = {
    TableName,
    KeyConditionExpression: '#JobId = :JobId',
    ExpressionAttributeNames: { '#JobId': 'JobId' },
    ExpressionAttributeValues: { ':JobId': 'some value' },
    Limit: 1000,
    Map: item => ({ JobId: item.JobId, Id: item.Id }) // Map Items into Item Key
};

const { Items: Keys } = await ddbFind(client, params);

// Delete Items
params = { RequestItems: {} };
params.RequestItems[TableName] = Keys.map(Key => ({ DeleteRequest: { Key } }));

await ddbBatchWrites(client, params);