aws-lambda-dynamodb-connector

This utility helps connect aws lambda to dynamodb and fetch data using promise and call back

Node.js Utility to fetch data from dynamodb for a given id to a lambda function.

How to use:

Create utils.js file and copy the contents of the file change table name and keyname as necessary

go to file where you want to get dynamodb values and import utils.js const Utils = require('utils.js'); let value = await Utils.readUserData(id); value contains dynamodb values for id

The dynamodb table should have trigger lambda function.

const Utils = {}

Download promise and aws-sdk modules in node_modules. git bash to node_modules folder npm install --save promise npm install --save aws-sdk

var Promise = require('promise'); var AWS = require('aws-sdk');

The document client simplifies working with items in Amazon DynamoDB by abstracting away the notion of attribute values. var docClient = new AWS.DynamoDB.DocumentClient();

The Promise.resolve() method returns a Promise object that is resolved with a given value. pass id as a paramter to fetch values for the primary key (id) you are looking for in dynamodb.

Utils.readUserData = function (id){ return new Promise((resolve, reject) => { loadUserData(id, (res) => { resolve(res); }); }); }

TableName : 'enter your table name from dynamodb' Key : { 'enter your key name from table within quotes' : id } use callback to send back data to promise

function loadUserData(id, callback) { let params = { TableName: 'yourtablename', Key: { 'yourkeynameindynamodb': id } };

docClient.get(params, function (error, data) {
    if (error) {
        return 'error occured';
    } 
    else { 
        callback(data.Item);
    }
});

} module.exports = Utils