Connecting Node.js app to DynamoDB

Question

So I have searched the past 2 days for documentation, examples, or anything that can specifically show me how to successively set a connection between my node.js app and AWS DynamoDB. I'm fairly new to both but it appears there's a lot more documentation for Java, PHP, and .NET.

Even after following all the directions on the documentation AWS provides, I cannot seem to get my application to work. To test if I configured everything correctly, I tried uploading a text file to S3, which worked just fine.

Any thoughts why this may happen? I don't get any errors or successes so I feel like it's not connected but not sure if anyone else out there is familiar with this issue? Thanks!

Don't use DynamoDB, if you can't do it yourself. It's very raw... — vp_arth
– vp_arth, Commented Jul 24, 2015 at 17:20

Nayan Patel · Accepted Answer · 2019-01-03 12:08:59Z

You need to first login to aws account, create a group and a user, after that you will get the Access key ID and Secret access key, which you can download in a csv file.

Then make a table and insert records into that table,and then you can use the below code using your Access key ID, Secret access key, region and the table name.

app.js

let app=require('express')();
let dynamoRoute= require('./dynamo');

app.use('/',dynamoRoute);

app.listen('4000',(err)=>{
    if(err) console.log(err)
    else console.log('server running');
})

module.exports=app;

dynamo.js

let AWS = require('aws-sdk');
let express = require('express');
let router = express.Router();
let config = require('./config/dev');
AWS.config.update({
 "region": "",
 "accessKeyId": "",
 "secretAccessKey": ""
});

let docClient = new AWS.DynamoDB.DocumentClient();
let table = "sports";

router.get('/fetch', (req, res) => {

let spid = '101';
let params = {
    TableName: table,
    Key: {
        spid: spid
    }
};

docClient.get(params, function (err, data) {
    if (err) {
        console.log(err);
        handleError(err, res);
    } else {
        handleSuccess(data.Item, res);
    }
 });
});
function handleError(err, res) {
    res.json({ 'message': 'server side error', statusCode: 500, error: 
    err });
}

function handleSuccess(data, res) {
    res.json({ message: 'success', statusCode: 200, data: data })
}

Jeffrey Nieh · Accepted Answer · 2015-07-24 17:22:42Z

2

You can use the AWS NodeJS SDK to work with DynamoDB (http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB.html). For a mid-level SDK that extracts away some of the complexities, you can also check out https://github.com/awslabs/dynamodb-document-js-sdk.

edited Jul 24, 2015 at 17:22

answered Jul 24, 2015 at 17:16

Jeffrey Nieh

3462 silver badges5 bronze badges

1 Comment

Jeffrey Nieh Over a year ago

If you'd like to try out the mid-level sdk locally, you can use DynamoDB Local with the JavaScript shell (docs.aws.amazon.com/amazondynamodb/latest/gettingstartedguide/…).

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